diff --git a/test/language/statements/for-await-of/async-func-dstr-const-ary-init-iter-get-err.js b/test/language/statements/for-await-of/async-func-dstr-const-ary-init-iter-get-err.js
index 9da24dcf7e82884248cad369d60acf3390833c04..7f74d1b2721503ad1941b9d1ded04dc74e8eb00d 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-ary-init-iter-get-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-ary-init-iter-get-err.js
@@ -55,6 +55,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-ary-val-null.js b/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-ary-val-null.js
index bb387d3285d598e9b0eebf8061b87b3d198e49d9..219497ed10e7139eafba832d1e136c151a13e4ab 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-ary-val-null.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-ary-val-null.js
@@ -62,6 +62,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-id-init-throws.js b/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-id-init-throws.js
index bd15ae9270f8fceb0803dfd188efa422bddad581..18831cbb6bdac9de455984f72f9da5e42661dd68 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-id-init-throws.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-id-init-throws.js
@@ -53,6 +53,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-id-init-unresolvable.js b/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-id-init-unresolvable.js
index 699df9e6a7429663782fc81b53bb3e87eff0a03f..958f04ee32bce6a3082019eb4c8f511e9e467e5e 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-id-init-unresolvable.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-id-init-unresolvable.js
@@ -60,6 +60,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, ReferenceError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, ReferenceError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-id-iter-step-err.js b/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-id-iter-step-err.js
index b0f6240e7217d4bcd0a5b8e77f02f48a4ad4dc6a..5c390f79c90f5942548874f515412c0f9e5183ae 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-id-iter-step-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-id-iter-step-err.js
@@ -61,6 +61,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-id-iter-val-err.js b/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-id-iter-val-err.js
index 201883140d551dd4a3e9c0f63e541ec933fbf1fb..d87b1a3bf400e3dc2a2e277790e218dfe73b8076 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-id-iter-val-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-id-iter-val-err.js
@@ -72,6 +72,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-obj-val-null.js b/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-obj-val-null.js
index 5dbb8aae09cf77d3defba1cf9674ed6e1ce18132..1e7c84aaeb6a1d385777ae91f56b65fe0958a345 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-obj-val-null.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-obj-val-null.js
@@ -62,6 +62,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-obj-val-undef.js b/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-obj-val-undef.js
index f57a737bfba6d3c29a643b9ffe0df8130ef026c3..33e86e68a171e8a7ee143dbab99febc15ee56772 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-obj-val-undef.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elem-obj-val-undef.js
@@ -62,6 +62,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elision-step-err.js b/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elision-step-err.js
index fd42bfbe9b6fa00e2287199fd30ab76615dd3b70..b249fd2eeffb402d632557b79c09041375fbab70 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elision-step-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-elision-step-err.js
@@ -66,7 +66,7 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-rest-id-elision-next-err.js b/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-rest-id-elision-next-err.js
index 331420049841884c9ebfd2eb219c732574ee4325..d73910b70a1867c4911d38e64108dae1d323af9d 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-rest-id-elision-next-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-rest-id-elision-next-err.js
@@ -55,6 +55,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-rest-id-iter-step-err.js b/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-rest-id-iter-step-err.js
index 5c428cb60bedfc085998d77dd020e4ae8f1116dc..c29c514b9f7d67a92c433a06f34c2867c86ca8d4 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-rest-id-iter-step-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-rest-id-iter-step-err.js
@@ -62,7 +62,7 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-rest-id-iter-val-err.js b/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-rest-id-iter-val-err.js
index 3e8d5d7a67b1c8c766c578ebd8082c5af97d2290..1392aa2984cb2f27daa09957666d455e8858284f 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-rest-id-iter-val-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-ary-ptrn-rest-id-iter-val-err.js
@@ -68,6 +68,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-const-obj-init-null.js b/test/language/statements/for-await-of/async-func-dstr-const-obj-init-null.js
index ea28e8223a1ef6fe259e8a61ef2f3c655c24a094..8b0a89b79c8044ec86c5bb487c892441f8f8b8d0 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-obj-init-null.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-obj-init-null.js
@@ -49,6 +49,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-const-obj-init-undefined.js b/test/language/statements/for-await-of/async-func-dstr-const-obj-init-undefined.js
index 60afada464b24126d65a7e8e28bf6794a7ec40e1..4fb0ea48bf2a59d29523caf89eba4c1f513d4756 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-obj-init-undefined.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-obj-init-undefined.js
@@ -49,6 +49,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-id-get-value-err.js b/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-id-get-value-err.js
index e5f578fd105c120c851ec765eef72ac4435beedf..0a50226a403da778454913dd1bef1445fb9f1865 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-id-get-value-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-id-get-value-err.js
@@ -56,6 +56,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-id-init-throws.js b/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-id-init-throws.js
index acf8199fc58d428c3fb436d0f27711864ba70d2e..829dffe76d47539e8fed0b8c9e6c6cb2599e6183 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-id-init-throws.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-id-init-throws.js
@@ -56,6 +56,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-id-init-unresolvable.js b/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-id-init-unresolvable.js
index 160c8fd48e58e4e3a8d3ec14fabefc76dcb09c19..d98d28f2c65e3c8faeff211d186cb399f220e3b0 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-id-init-unresolvable.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-id-init-unresolvable.js
@@ -60,6 +60,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, ReferenceError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, ReferenceError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-list-err.js b/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-list-err.js
index 1354691d8e042b1abf29fbd837538ad67aa53662..e37bcbdfc20c9b3b61ba0d1c112d1398b7f6e83b 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-list-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-list-err.js
@@ -55,7 +55,7 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-ary-value-null.js b/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-ary-value-null.js
index 1bfc8b26af0f728c7362126390b906bc0c248911..5f4e98d1283dbf1c223db5459f28e3b0506382d9 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-ary-value-null.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-ary-value-null.js
@@ -51,6 +51,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-eval-err.js b/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-eval-err.js
index 560b7b727ffa4b825e2f44fc21876ab4725ab4c9..3bdd7c6fd1de4405d689dda3f2d99beb7df6443b 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-eval-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-eval-err.js
@@ -53,6 +53,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-id-get-value-err.js b/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-id-get-value-err.js
index 2dd96d03bfe1a50df73de2913cf2ef1a2b29cec1..ab2ef7c4618c03c3d2a0b4b49e5729686ec4be37 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-id-get-value-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-id-get-value-err.js
@@ -56,7 +56,7 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-id-init-throws.js b/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-id-init-throws.js
index 9b3445c284c51565c4626d7bb985feac401e1b38..9a9fffe76a3627b90689de57a7a89a5f16df7c1a 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-id-init-throws.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-id-init-throws.js
@@ -56,6 +56,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-id-init-unresolvable.js b/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-id-init-unresolvable.js
index f8b2c3f3aed8bdacd079f6393aa3bd1701d0249f..2ec54e3ce9e8355e8cee01883dfae9c04ecec3c1 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-id-init-unresolvable.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-id-init-unresolvable.js
@@ -60,6 +60,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, ReferenceError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, ReferenceError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-obj-value-null.js b/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-obj-value-null.js
index fc16686aa5a11e570fb85d60d0b84f43333c5595..899e6709ca0f6b23b1ebb72b42752c588a8a80f4 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-obj-value-null.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-obj-value-null.js
@@ -51,6 +51,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-obj-value-undef.js b/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-obj-value-undef.js
index 90450b19cb719dbf437b8245c3385e4fb0eb84bc..a0d082d80c711e37fa93bc690a6e4d9f3160bc7d 100644
--- a/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-obj-value-undef.js
+++ b/test/language/statements/for-await-of/async-func-dstr-const-obj-ptrn-prop-obj-value-undef.js
@@ -51,6 +51,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-ary-init-iter-get-err.js b/test/language/statements/for-await-of/async-func-dstr-let-ary-init-iter-get-err.js
index 12b62c47722bba713dce4df4a65f8f8c92b8d66b..53356d8e5838d0b5bc4147009963ebe115607ad0 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-ary-init-iter-get-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-ary-init-iter-get-err.js
@@ -55,6 +55,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-ary-val-null.js b/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-ary-val-null.js
index b87926ec433ea88fb6230793457c45b861b9683d..c4e8a5b56a00bce653a9ad5ff73cf0b854a865de 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-ary-val-null.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-ary-val-null.js
@@ -62,6 +62,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-id-init-throws.js b/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-id-init-throws.js
index f9b468dac18b2e44a8f2125552ef4f7ea0a5b8f5..88da5ae80781bde442ab503edcea0f0886cbd488 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-id-init-throws.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-id-init-throws.js
@@ -53,6 +53,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-id-init-unresolvable.js b/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-id-init-unresolvable.js
index d683743e9cb0d806f6ea0bcb5824936463e2cf24..4dd930c0371616f708abc576fdfc32b1a659793b 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-id-init-unresolvable.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-id-init-unresolvable.js
@@ -60,6 +60,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, ReferenceError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, ReferenceError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-id-iter-step-err.js b/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-id-iter-step-err.js
index 42e47aa5bdc579d5cc7201581bae43981b20bd28..383d37d27a3b135ad5de2a25faaad232e670daa1 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-id-iter-step-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-id-iter-step-err.js
@@ -61,6 +61,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-id-iter-val-err.js b/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-id-iter-val-err.js
index ebf0dbe427a0b9c38336e2b5e65d126119b20396..8473eb939f4ab3ca0925bf2a4eb1605e99df0eb8 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-id-iter-val-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-id-iter-val-err.js
@@ -72,6 +72,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-obj-val-null.js b/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-obj-val-null.js
index 3e9dcbe7cd029bc85b4c0d36ba3a6ea78285df83..ce125433de6926b02bae729ed420d896b378f11d 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-obj-val-null.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-obj-val-null.js
@@ -62,6 +62,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-obj-val-undef.js b/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-obj-val-undef.js
index 10178b11e8823949d16e69207412c57c33b9108e..262a572a4ad25b8d3c5ccaa931c7080f26a77065 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-obj-val-undef.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elem-obj-val-undef.js
@@ -62,6 +62,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elision-step-err.js b/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elision-step-err.js
index 1cf324585cfcbee9b3683b97da69c5606ea52135..7abaa288e678691abb0448b524de6bd6e38b38a4 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elision-step-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-elision-step-err.js
@@ -66,7 +66,7 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-rest-id-elision-next-err.js b/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-rest-id-elision-next-err.js
index 73ccf728c44c00522dbd68718318d4ff07204973..32bad54f2a47e6775505aeaea5028818b913a2fa 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-rest-id-elision-next-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-rest-id-elision-next-err.js
@@ -55,6 +55,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-rest-id-iter-step-err.js b/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-rest-id-iter-step-err.js
index 9bc64fa0088e04555f1ee7fabb28dccb07b456f6..3d8c48099906c616f0bc954e2f45b892c2497a58 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-rest-id-iter-step-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-rest-id-iter-step-err.js
@@ -62,7 +62,7 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-rest-id-iter-val-err.js b/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-rest-id-iter-val-err.js
index 511fa2bb478f320919316daa3df745a478958891..a45531ed320ca7458f12ec64956331f0f4a0543e 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-rest-id-iter-val-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-ary-ptrn-rest-id-iter-val-err.js
@@ -68,6 +68,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-obj-init-null.js b/test/language/statements/for-await-of/async-func-dstr-let-obj-init-null.js
index 955bd17e8371a2f9ae82306225c015815dd15930..dbdab0a47dd28f5d048d80bd10d86d383a14a3fe 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-obj-init-null.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-obj-init-null.js
@@ -49,6 +49,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-obj-init-undefined.js b/test/language/statements/for-await-of/async-func-dstr-let-obj-init-undefined.js
index 450b7227f29a4948d6bc7ab8612e7afb59d446eb..0ecf2b2ffbb753c400f352e4d679ba0728656382 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-obj-init-undefined.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-obj-init-undefined.js
@@ -49,6 +49,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-id-get-value-err.js b/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-id-get-value-err.js
index 1e77d91be6e9dcd51426939365ca35811c95e49d..be24e507c00192a694890d014a96447374cb05d2 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-id-get-value-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-id-get-value-err.js
@@ -56,6 +56,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-id-init-throws.js b/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-id-init-throws.js
index 3fbf30fb2de54ae8fb520d75297fed1cc48446a3..b0afd151cd2aa078087fc594fe31c752ce624c5d 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-id-init-throws.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-id-init-throws.js
@@ -56,6 +56,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-id-init-unresolvable.js b/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-id-init-unresolvable.js
index 180a4bf7657881a45a0410bedd24e51883a689cf..f64640d0e04674837b3c21abe5c51561927cda69 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-id-init-unresolvable.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-id-init-unresolvable.js
@@ -60,6 +60,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, ReferenceError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, ReferenceError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-list-err.js b/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-list-err.js
index e52ef1ce70600d4d7272a5c900814fa167c91571..43ebe82541648234fe73214c1e35a612793d6b1e 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-list-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-list-err.js
@@ -55,7 +55,7 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-ary-value-null.js b/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-ary-value-null.js
index 9e5b06c3f9f218f26fc1365851b02b0ffc130645..65e7fc5a5cf8d134d1dc6b677cdef9e73c692120 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-ary-value-null.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-ary-value-null.js
@@ -51,6 +51,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-eval-err.js b/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-eval-err.js
index 783753532ded8480dbc7a8bb9fd78a82809d98bb..2c0586bfafac9a0c1b7338fa1dbd8144e45afd32 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-eval-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-eval-err.js
@@ -53,6 +53,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-id-get-value-err.js b/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-id-get-value-err.js
index 426855dcace6cbac88971053cbbd8651874dd0f4..3c538f1690eaea9500a33351b15601ee27b0ee60 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-id-get-value-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-id-get-value-err.js
@@ -56,7 +56,7 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-id-init-throws.js b/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-id-init-throws.js
index 9c769ad08e77f14add1daca657112c34a1dc0154..825458c4e2ab60700bdc5a823ac1cb0a2df2bb70 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-id-init-throws.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-id-init-throws.js
@@ -56,6 +56,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-id-init-unresolvable.js b/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-id-init-unresolvable.js
index 31ecf590f729841a85445e77e9de606bc2877cfc..cf8464d69d9e9a57c1bb36f585dd83e5c15abb72 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-id-init-unresolvable.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-id-init-unresolvable.js
@@ -60,6 +60,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, ReferenceError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, ReferenceError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-obj-value-null.js b/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-obj-value-null.js
index 214ab9ad23a739fc7c6380f3f162cce612fe90cd..144919852e60e3d4d50b0f42d70bca37d9eb4fec 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-obj-value-null.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-obj-value-null.js
@@ -51,6 +51,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-obj-value-undef.js b/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-obj-value-undef.js
index 83d4fe737b5c99da036738b6f67b5d27d19a94af..81f32098370d3bb69ba915fa30496fa111558e2d 100644
--- a/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-obj-value-undef.js
+++ b/test/language/statements/for-await-of/async-func-dstr-let-obj-ptrn-prop-obj-value-undef.js
@@ -51,6 +51,6 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-ary-init-iter-get-err.js b/test/language/statements/for-await-of/async-func-dstr-var-ary-init-iter-get-err.js
index cfa5cb4bfe4f3d63d3c7eaa65d77f6d302c2ac2a..c09e0e152c89006f483ea1ae33d8584abeac3047 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-ary-init-iter-get-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-ary-init-iter-get-err.js
@@ -55,5 +55,5 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-ary-val-null.js b/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-ary-val-null.js
index 6d255ef275bcb2174f6ffc60ce4bebd82fc9457f..251c81466a0d22a959cc58b9199ba5b4ef2928dd 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-ary-val-null.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-ary-val-null.js
@@ -62,5 +62,5 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-id-init-throws.js b/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-id-init-throws.js
index 50dfb1f4a4a3e4be54516db0afe64b8bceb89666..0a15bf6c94c66b69ec8f951f2583c7cfb9284a3c 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-id-init-throws.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-id-init-throws.js
@@ -53,5 +53,5 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-id-init-unresolvable.js b/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-id-init-unresolvable.js
index 8843287483ea22279a58a05bd01d8f559940107c..4d90195ec8916bbfa5a970eeeadacdf4b9c4ff1d 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-id-init-unresolvable.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-id-init-unresolvable.js
@@ -60,5 +60,5 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, ReferenceError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, ReferenceError))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-id-iter-step-err.js b/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-id-iter-step-err.js
index 6ec536b76c067bffe9e62ec09ef84e54e97e7873..7a7e676931ff836335d232015850d11595b36d66 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-id-iter-step-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-id-iter-step-err.js
@@ -61,5 +61,5 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-id-iter-val-err.js b/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-id-iter-val-err.js
index e9ffc53df2d87068615a62d8befc5ca7bec50d8c..a80a43a4d74a004f2078b1fbf7046d3800ff4e79 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-id-iter-val-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-id-iter-val-err.js
@@ -72,5 +72,5 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-obj-val-null.js b/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-obj-val-null.js
index 441e5083d3d336dea8bcfcc1abfc98542502b869..b0c0d748c5d62f624e4c01df5f03b84a45c3a310 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-obj-val-null.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-obj-val-null.js
@@ -62,5 +62,5 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-obj-val-undef.js b/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-obj-val-undef.js
index f0c5f2a395d8a4ff26daebf061e1b77c6921bd50..63dde3d756b1bd9ff497db833b8461ff7887d742 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-obj-val-undef.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elem-obj-val-undef.js
@@ -62,5 +62,5 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elision-step-err.js b/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elision-step-err.js
index e479c083047097d3ca9fcfbc078dfe1f5dc8828e..838aafc87c8bfffd6b7df21376ed43b52bf1edae 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elision-step-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-elision-step-err.js
@@ -66,7 +66,7 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
 iter.next();
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-rest-id-elision-next-err.js b/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-rest-id-elision-next-err.js
index 11d946d86b5d0bf00d2decb0c6413a50fcb9e477..27a1c063fa88a80e807eb30acfb841d85fa46cc2 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-rest-id-elision-next-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-rest-id-elision-next-err.js
@@ -55,5 +55,5 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-rest-id-iter-step-err.js b/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-rest-id-iter-step-err.js
index 0505025f6376e297da1cdeee30dab108bbcbbd33..fcf8a39f445eefb267ee9f6f62cc0136cf7f157d 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-rest-id-iter-step-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-rest-id-iter-step-err.js
@@ -62,7 +62,7 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
 iter.next();
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-rest-id-iter-val-err.js b/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-rest-id-iter-val-err.js
index db39511b8a6753d6ba5f52c8af11dccbd879fc8f..48332e26bbbee77e2336be0ab818db877df667f9 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-rest-id-iter-val-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-ary-ptrn-rest-id-iter-val-err.js
@@ -68,5 +68,5 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-obj-init-null.js b/test/language/statements/for-await-of/async-func-dstr-var-obj-init-null.js
index 09d1a4ecce15636bd11785e8ae15937f5c7d773b..ab9469b3d5dcd9fee8485ae66196c577b9e3b6b5 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-obj-init-null.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-obj-init-null.js
@@ -49,5 +49,5 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-obj-init-undefined.js b/test/language/statements/for-await-of/async-func-dstr-var-obj-init-undefined.js
index c088bb341c55555469f112fa368fd2c4bf9a17da..d2026d788d2083777c71ffe4ab2e4a90326a4ec1 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-obj-init-undefined.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-obj-init-undefined.js
@@ -49,5 +49,5 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-id-get-value-err.js b/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-id-get-value-err.js
index 5c5902f2443ab0b2552f7e852f744310ec8c6d1b..59a250c047a6fec9c5b75bda2a106882d135ceb6 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-id-get-value-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-id-get-value-err.js
@@ -56,5 +56,5 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-id-init-throws.js b/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-id-init-throws.js
index 4b220333edfa9065d8a327e55f323920839457e6..546834c49acef41caa093bbcb9055e9240d98571 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-id-init-throws.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-id-init-throws.js
@@ -56,5 +56,5 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-id-init-unresolvable.js b/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-id-init-unresolvable.js
index 291a8cc4da1fcbf708bda2da374e0a871383745b..c502db56581c0268df499b297aeb1070596aeb15 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-id-init-unresolvable.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-id-init-unresolvable.js
@@ -60,5 +60,5 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, ReferenceError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, ReferenceError))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-list-err.js b/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-list-err.js
index bcf36faf02c4f08e107412d8f0d0e6448cda54d3..f8c8473f5f9825c958349cc107cb60f45fce0761 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-list-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-list-err.js
@@ -55,7 +55,7 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
 assert.sameValue(initCount, 0);
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-ary-value-null.js b/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-ary-value-null.js
index 93646baf3d65f7cbd949778b706cf80e5a61295e..c28b7f0f3888ccd6debf1a61dcba81207a81afa1 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-ary-value-null.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-ary-value-null.js
@@ -51,5 +51,5 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-eval-err.js b/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-eval-err.js
index d680fe914d8985d2f5269b1640247d950fa9456e..6163b5943b1db43209b2c4d77a9382f84520da07 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-eval-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-eval-err.js
@@ -53,5 +53,5 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-id-get-value-err.js b/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-id-get-value-err.js
index e23a739d4061021d81367b9b633db3fe15c67769..efd46c54a41da341a054fa92e5fbddc7e825e06c 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-id-get-value-err.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-id-get-value-err.js
@@ -56,7 +56,7 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
 assert.sameValue(initEvalCount, 0);
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-id-init-throws.js b/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-id-init-throws.js
index 8c7240cde4a0fa76483eb3892c8dffd157d9c5e9..fdbba6ad72466073366e897570c46722ae8d1252 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-id-init-throws.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-id-init-throws.js
@@ -56,5 +56,5 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-id-init-unresolvable.js b/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-id-init-unresolvable.js
index a31720a485b9213f10b40542bc6d9d32fa92fdcf..3992c982de2cda9e56c639fa53e0d7699c7536b6 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-id-init-unresolvable.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-id-init-unresolvable.js
@@ -60,5 +60,5 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, ReferenceError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, ReferenceError))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-obj-value-null.js b/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-obj-value-null.js
index 6f90b6939592e96db15bb356940a20159b3e30d3..ac04f8bbe72da4436841c53898509af6a50efe14 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-obj-value-null.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-obj-value-null.js
@@ -51,5 +51,5 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-obj-value-undef.js b/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-obj-value-undef.js
index 8c8036684bfac3a90954428b45459e9c4dcc85d6..0938b4455016dc94dedf86a69be35354298d6232 100644
--- a/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-obj-value-undef.js
+++ b/test/language/statements/for-await-of/async-func-dstr-var-obj-ptrn-prop-obj-value-undef.js
@@ -51,5 +51,5 @@ async function fn() {
 }
 
 fn()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-ary-init-iter-get-err.js b/test/language/statements/for-await-of/async-gen-dstr-const-ary-init-iter-get-err.js
index 1862861721f1f29e9e04262929db3708ebb02732..d9409274ff2d739c61dbcc4786f95f8984ea646f 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-ary-init-iter-get-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-ary-init-iter-get-err.js
@@ -55,6 +55,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-ary-val-null.js b/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-ary-val-null.js
index a3a90b88fa67fa7c11bfe6761f558a7a374a34fc..08b0984ce5d7a7bd5160ae90ce65a5b8de0d5ec0 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-ary-val-null.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-ary-val-null.js
@@ -62,6 +62,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-id-init-throws.js b/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-id-init-throws.js
index 8c0e96fba64f03c00c6481aa9b192eb7d43d594e..06bb647b07f3a940a1bf75d6554c3c1616de31ff 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-id-init-throws.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-id-init-throws.js
@@ -53,6 +53,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-id-init-unresolvable.js b/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-id-init-unresolvable.js
index a2d02f2c1696a2c027904a37dea5abf6f18b3f0b..49ebff0aec6a11450eae8882d677da4631b656fc 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-id-init-unresolvable.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-id-init-unresolvable.js
@@ -60,6 +60,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, ReferenceError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, ReferenceError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-id-iter-step-err.js b/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-id-iter-step-err.js
index eb45be31ce41c232d60da3328905f2e189bf252d..56503b9946fde4ef7c29cd92de0589f224c469ab 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-id-iter-step-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-id-iter-step-err.js
@@ -61,6 +61,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-id-iter-val-err.js b/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-id-iter-val-err.js
index f22a8b721e6da4f75a1ee3d39857d7fbc3e4b212..8be2a16a104686e16d057469d9a25db1c9f0db44 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-id-iter-val-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-id-iter-val-err.js
@@ -72,6 +72,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-obj-val-null.js b/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-obj-val-null.js
index 72157c912bf1719d5c5b597cfa15ba5f4e03d872..ebda36b6a7b8c3fc92516ba6dd099f9024bd93aa 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-obj-val-null.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-obj-val-null.js
@@ -62,6 +62,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-obj-val-undef.js b/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-obj-val-undef.js
index 60ea181ceed0b34c824abc0eada31afc6a1d8a00..7f30dcac7a5d851f435ae0a037b7cbb976ad4055 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-obj-val-undef.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elem-obj-val-undef.js
@@ -62,6 +62,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elision-step-err.js b/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elision-step-err.js
index d4704ce5ec9103b46406762c553f8f65f81b300b..cea351065b9753494756bd027f47dc6f4bb50869 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elision-step-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-elision-step-err.js
@@ -66,7 +66,7 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-rest-id-elision-next-err.js b/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-rest-id-elision-next-err.js
index 58ffcd6f641a70c4726ec79a80f97331cc6f45ae..ed6ab32edb2cdd76791da528c0f04b1f3c60074b 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-rest-id-elision-next-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-rest-id-elision-next-err.js
@@ -55,6 +55,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-rest-id-iter-step-err.js b/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-rest-id-iter-step-err.js
index 57dd0e59cdb86678e9e00802fe99c4633f8aab36..a8d4e2584dcebe2c24562914b0a16dfe8180a49b 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-rest-id-iter-step-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-rest-id-iter-step-err.js
@@ -62,7 +62,7 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-rest-id-iter-val-err.js b/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-rest-id-iter-val-err.js
index 182e1242b13dd98835de6204655f5d74f74a94d1..deb85fcb547925efe3f98e58db16c4e006a33ea6 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-rest-id-iter-val-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-ary-ptrn-rest-id-iter-val-err.js
@@ -68,6 +68,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-obj-init-null.js b/test/language/statements/for-await-of/async-gen-dstr-const-obj-init-null.js
index f033632b8a15e91d6e81ef4aa6cf31195e45aa36..6f1aaf9fec0bf233f900bad3dbd6c8d337f3a549 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-obj-init-null.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-obj-init-null.js
@@ -49,6 +49,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-obj-init-undefined.js b/test/language/statements/for-await-of/async-gen-dstr-const-obj-init-undefined.js
index 122c83a14050f6ecf4716e38c8167ce7dbc73165..911c21a52370bc7adf4316a3c45c4e8b50282fdb 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-obj-init-undefined.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-obj-init-undefined.js
@@ -49,6 +49,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-id-get-value-err.js b/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-id-get-value-err.js
index 7453f3c16631ed38386c20337e2e5f0e3d81025d..2e158d68c89ea93103028ce30ca89d6ac6995a5e 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-id-get-value-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-id-get-value-err.js
@@ -56,6 +56,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-id-init-throws.js b/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-id-init-throws.js
index 3ddbba3de5464a896b2163a613fc9204f2431394..7ce139cb16d084be652dee96732817923ede5286 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-id-init-throws.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-id-init-throws.js
@@ -56,6 +56,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-id-init-unresolvable.js b/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-id-init-unresolvable.js
index e608f96f3902d1c82c80a646df3b91cc61350f87..14839e6f1ca600dd9a66cfd54672425280db9fa3 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-id-init-unresolvable.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-id-init-unresolvable.js
@@ -60,6 +60,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, ReferenceError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, ReferenceError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-list-err.js b/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-list-err.js
index c902df24b8809ad0c6c878201f71415e2a14a0d9..b1390a8e5239dd1cea7d009d350f8609948d530c 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-list-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-list-err.js
@@ -55,7 +55,7 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-ary-value-null.js b/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-ary-value-null.js
index 08361ef67ad59d3f662e07a95dae026d557ee79a..dd0be9ae3327fa8baeac2b3726a182b32a02f6d3 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-ary-value-null.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-ary-value-null.js
@@ -51,6 +51,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-eval-err.js b/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-eval-err.js
index 39e7585c8d7122e9448eb61ad662c7c87ac26a18..05bd8c2f750cd594b8cab07d2efe5f766bd32400 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-eval-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-eval-err.js
@@ -53,6 +53,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-id-get-value-err.js b/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-id-get-value-err.js
index ac75fdbaac1af875e6a69b3adcc625c9e353982e..fe9f3e29fbcb25f3ec29a869b9109cc5b98dd8ce 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-id-get-value-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-id-get-value-err.js
@@ -56,7 +56,7 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-id-init-throws.js b/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-id-init-throws.js
index ec2c87bd53994c6c5e73bdd41e6086caf000db6c..6b3e5569d4638455714bfecd832349553ad941c0 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-id-init-throws.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-id-init-throws.js
@@ -56,6 +56,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-id-init-unresolvable.js b/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-id-init-unresolvable.js
index 1e579b0266d5fff119cf5f0f2a3b39def79f61e7..60b8d6f3e2e4b859bc85e3e7000ee23f18218aed 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-id-init-unresolvable.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-id-init-unresolvable.js
@@ -60,6 +60,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, ReferenceError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, ReferenceError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-obj-value-null.js b/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-obj-value-null.js
index e1870cbe3d7670c0ca3208b2bea9d9f6a84608d6..8d06d6c94c40488da5027b8b2530e48806ffa89b 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-obj-value-null.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-obj-value-null.js
@@ -51,6 +51,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-obj-value-undef.js b/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-obj-value-undef.js
index db09efb8f6b249621c568f8413c45ae409abef26..f255baac2557f5362e89929017770c096eb598a5 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-obj-value-undef.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-const-obj-ptrn-prop-obj-value-undef.js
@@ -51,6 +51,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-ary-init-iter-get-err.js b/test/language/statements/for-await-of/async-gen-dstr-let-ary-init-iter-get-err.js
index 46741b80e08f0aeb5d051ff37e97c00df4019313..b5430dee8c3850d0cf174ff0c25696f0edba285f 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-ary-init-iter-get-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-ary-init-iter-get-err.js
@@ -55,5 +55,5 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-ary-val-null.js b/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-ary-val-null.js
index 8cb11d7d936f39128dda8dc4dc1efd78d503e5f8..58eef04c7f5a525acdac26ea9c6cce9b969f479d 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-ary-val-null.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-ary-val-null.js
@@ -62,5 +62,5 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-id-init-throws.js b/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-id-init-throws.js
index d5cd68a9d6cd6b157a0bbe9aa26c13c323901b7c..9d186db3cc8eae5f2a2c24628431384ae4a15471 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-id-init-throws.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-id-init-throws.js
@@ -53,5 +53,5 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-id-init-unresolvable.js b/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-id-init-unresolvable.js
index 9c2d1f4e0c4ec6a0f347bd24b0aece95ec970820..ad09d560f4794ad269bdffca4f3cb48ba51065a7 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-id-init-unresolvable.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-id-init-unresolvable.js
@@ -60,5 +60,5 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, ReferenceError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, ReferenceError))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-id-iter-step-err.js b/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-id-iter-step-err.js
index 1329aeb034608a4f2016014062cd230ec22f3fb0..54920fc28034d78b7692229ff5ed8fae45700021 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-id-iter-step-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-id-iter-step-err.js
@@ -61,5 +61,5 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-id-iter-val-err.js b/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-id-iter-val-err.js
index ac90a30a4f534c87d1a4d87d784b2bdf69ded503..f953460b6e98f6a7b4959807ff2cadc52c1aeeb4 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-id-iter-val-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-id-iter-val-err.js
@@ -72,5 +72,5 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-obj-val-null.js b/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-obj-val-null.js
index 01423ae1553c7bb362511f8981b127ad84173282..99e52283e100ca4a44956f285d29a6a1c4aa57f5 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-obj-val-null.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-obj-val-null.js
@@ -62,5 +62,5 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-obj-val-undef.js b/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-obj-val-undef.js
index 6af6d06f5570252a7b3f0591e697069a72bfcd3c..b3d2ecbd6734ea12985cd16b92c58aebfa65b2d9 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-obj-val-undef.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elem-obj-val-undef.js
@@ -62,5 +62,5 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elision-step-err.js b/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elision-step-err.js
index b5a858877c7524c11544f5e264a93cd503e6c521..ef7ee3686127b4dd5c6fb181ac1315a453290de9 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elision-step-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-elision-step-err.js
@@ -66,7 +66,7 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
 iter.next();
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-rest-id-elision-next-err.js b/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-rest-id-elision-next-err.js
index fba96bfa78acd9b4dc908da5b4c6c4abd3594807..be6b5fd3caaf9e12652c96d4368cc30242c0af72 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-rest-id-elision-next-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-rest-id-elision-next-err.js
@@ -55,5 +55,5 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-rest-id-iter-step-err.js b/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-rest-id-iter-step-err.js
index cadf333daba6d109e010312451b605673eb10e1a..1c4fa51cd7fe136dfcc1b057b4497dddb7472661 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-rest-id-iter-step-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-rest-id-iter-step-err.js
@@ -62,7 +62,7 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
 iter.next();
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-rest-id-iter-val-err.js b/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-rest-id-iter-val-err.js
index 251a49afb769dba66e701dd97c088a647196fed5..634306e0c8951de909edebfbde14774711d8c185 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-rest-id-iter-val-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-ary-ptrn-rest-id-iter-val-err.js
@@ -68,5 +68,5 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-obj-init-null.js b/test/language/statements/for-await-of/async-gen-dstr-let-obj-init-null.js
index 4c1b77e1a782d488648e1e6115871618504279da..34dde4ad402ffb8023d8d3f5aca14222d157d343 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-obj-init-null.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-obj-init-null.js
@@ -49,5 +49,5 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-obj-init-undefined.js b/test/language/statements/for-await-of/async-gen-dstr-let-obj-init-undefined.js
index 31254fe61c83340fab76f6f176548af7add31927..fdac18e5cf96fa395dcebee9bd1d04330a9bff8e 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-obj-init-undefined.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-obj-init-undefined.js
@@ -49,5 +49,5 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-id-get-value-err.js b/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-id-get-value-err.js
index 02e34625eb51666a1f64f8ab75939b315eea98ad..c3a436c71ab65cae830b9fadb3c437800034baef 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-id-get-value-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-id-get-value-err.js
@@ -56,5 +56,5 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-id-init-throws.js b/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-id-init-throws.js
index b769bf10321c6544dbbc06f74b650c2a36e3eb74..c4c4b667ca44e0d8cc8fbea5a666a71ec972566b 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-id-init-throws.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-id-init-throws.js
@@ -56,5 +56,5 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-id-init-unresolvable.js b/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-id-init-unresolvable.js
index 6ef453222a77a498d4db53f0cc65e7f130e4f0c4..f8144bc17435d64cfd2f5b64659e817bdc98ace2 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-id-init-unresolvable.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-id-init-unresolvable.js
@@ -60,5 +60,5 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, ReferenceError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, ReferenceError))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-list-err.js b/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-list-err.js
index c4fa1f25ae59de80ee819df18bcb6933c7888da6..bb9a55a527ccc1c8b2ad69861b1c0efaf5f84175 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-list-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-list-err.js
@@ -55,7 +55,7 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
 assert.sameValue(initCount, 0);
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-ary-value-null.js b/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-ary-value-null.js
index 3c32db5539f5ae26d22f52566a7160dfe5dbbcbe..36873e5b13a00947cde618fa58894c9152e8e5bc 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-ary-value-null.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-ary-value-null.js
@@ -51,5 +51,5 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-eval-err.js b/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-eval-err.js
index 3cf4177b6ad10547507e1d7565aa966b4f90a770..11b33ff65f453c9a23a9e36741330dadda5f2b55 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-eval-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-eval-err.js
@@ -53,5 +53,5 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-id-get-value-err.js b/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-id-get-value-err.js
index 1692345a6660975a0c697f5926a12780bcf30b94..7ee5d99b6d71b440b7430af7c761cb0af81bf07d 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-id-get-value-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-id-get-value-err.js
@@ -56,7 +56,7 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
 assert.sameValue(initEvalCount, 0);
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-id-init-throws.js b/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-id-init-throws.js
index 3271a5dfa99bf6f43c6e6281905ac5dbbad86d57..7888a773d623ee6a1cb9dd0a76c5e83ae10adf40 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-id-init-throws.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-id-init-throws.js
@@ -56,5 +56,5 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-id-init-unresolvable.js b/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-id-init-unresolvable.js
index e831ea42e6019699ab2754d024ab2c2d425ce266..2bcbb2f3abfa5b30e874dd65ee0f00cdf06e5852 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-id-init-unresolvable.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-id-init-unresolvable.js
@@ -60,5 +60,5 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, ReferenceError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, ReferenceError))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-obj-value-null.js b/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-obj-value-null.js
index e23a1bb9e978b20f371db54006bcd7ac9dacdc26..ee2d6245d2ea7ed1a221745b3d3716a36e436a7b 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-obj-value-null.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-obj-value-null.js
@@ -51,5 +51,5 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-obj-value-undef.js b/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-obj-value-undef.js
index 82e71ea931bb3f5c3d1e505c2cc8d124943a2887..8cf6ea33ae03e2d5786442e4d8231ff8dfec84f3 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-obj-value-undef.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-let-obj-ptrn-prop-obj-value-undef.js
@@ -51,5 +51,5 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-ary-init-iter-get-err.js b/test/language/statements/for-await-of/async-gen-dstr-var-ary-init-iter-get-err.js
index a74a3b5d965c2faf0d4033563635864340cc0816..53f66b170e18d3459479bb547fb70e6e5576844f 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-ary-init-iter-get-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-ary-init-iter-get-err.js
@@ -55,6 +55,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-ary-val-null.js b/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-ary-val-null.js
index a8ab29bbccef99a2a29a914f4f04e9a1bad78ae9..0676e7df694ebb3b4362fd7fd8b936c13c5db5c9 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-ary-val-null.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-ary-val-null.js
@@ -62,6 +62,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-id-init-throws.js b/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-id-init-throws.js
index 267d3362e0997d72eb4b3827005d8121248cda99..e7c78ecaa59281b8dbf0d6fac7c2b498dd18048c 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-id-init-throws.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-id-init-throws.js
@@ -53,6 +53,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-id-init-unresolvable.js b/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-id-init-unresolvable.js
index ac20681ef8a3326b08d2b0cd0bc25ffd3a4c1a19..174882ee590c40ef9efcd0c3095e2e6dcc77ea07 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-id-init-unresolvable.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-id-init-unresolvable.js
@@ -60,6 +60,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, ReferenceError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, ReferenceError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-id-iter-step-err.js b/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-id-iter-step-err.js
index 1a0c0ce0c2bc557e9db9714794426f6bdb55dfa2..9c0461c2e824678137d759eeb2438bb8627e343b 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-id-iter-step-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-id-iter-step-err.js
@@ -61,6 +61,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-id-iter-val-err.js b/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-id-iter-val-err.js
index 9d764066f41558a07a4a5c7e9fd432f4f07f5c14..01dfb67cfdbb5ac5609c8bf037d001cf5fc927f2 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-id-iter-val-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-id-iter-val-err.js
@@ -72,6 +72,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-obj-val-null.js b/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-obj-val-null.js
index 7ca17a4126ff4a4245891cccf88bc3ba17772813..f35a0f6936357d0eaae0f2e3acbb2c2c3256556e 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-obj-val-null.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-obj-val-null.js
@@ -62,6 +62,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-obj-val-undef.js b/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-obj-val-undef.js
index a2ef24f31c7387386ffff558f9789ded7d146454..81ba2fd0fcc6af13344fa3361702244b84be1193 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-obj-val-undef.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elem-obj-val-undef.js
@@ -62,6 +62,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elision-step-err.js b/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elision-step-err.js
index 27b0231dbef6996739029fc9522fdfe6ecfa70d9..e3853f3bd23ab692345c145f5f8587ddca5adfb0 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elision-step-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-elision-step-err.js
@@ -66,7 +66,7 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-rest-id-elision-next-err.js b/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-rest-id-elision-next-err.js
index cde00838d2dedc54a0c9b152f6140e6c551f7bbf..63a3b6137f1af620652db6c59aeebc5ae4d6b97d 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-rest-id-elision-next-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-rest-id-elision-next-err.js
@@ -55,6 +55,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-rest-id-iter-step-err.js b/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-rest-id-iter-step-err.js
index 63e8ed66d71413685f9ca2036af74989fbf40dc6..3469341af921398fcaeab727fc3d3372a46c82f6 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-rest-id-iter-step-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-rest-id-iter-step-err.js
@@ -62,7 +62,7 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-rest-id-iter-val-err.js b/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-rest-id-iter-val-err.js
index a68cc731283b270bf27097c279d9aa5bf988a69a..c50287ea69825649a149ef5dc7d6d00126f176e0 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-rest-id-iter-val-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-rest-id-iter-val-err.js
@@ -68,6 +68,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-obj-init-null.js b/test/language/statements/for-await-of/async-gen-dstr-var-obj-init-null.js
index db7e73ba92a29eeebd7000515c52fa390f38bd48..fc7ba6fd7b638426877799817b22ca4556d71a21 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-obj-init-null.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-obj-init-null.js
@@ -49,6 +49,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-obj-init-undefined.js b/test/language/statements/for-await-of/async-gen-dstr-var-obj-init-undefined.js
index 21b565b2bbdb70640be04b965815270d3cc0c063..6dbb142f45b1d32a6b5aa7a8962ccc407e6bdc66 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-obj-init-undefined.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-obj-init-undefined.js
@@ -49,6 +49,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-id-get-value-err.js b/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-id-get-value-err.js
index 20a44666812669e9460de2de6580ee21fcf866fc..78a5187a4ee9897d974dca98cf0669c969d960e1 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-id-get-value-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-id-get-value-err.js
@@ -56,6 +56,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-id-init-throws.js b/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-id-init-throws.js
index b24aac79e7e66d34e71479764a88352b7b008126..be7c673a1f9a72e24d4604a9d077317ed6a1766f 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-id-init-throws.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-id-init-throws.js
@@ -56,6 +56,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-id-init-unresolvable.js b/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-id-init-unresolvable.js
index 36c561c4d1f74ae8233f59613eb06d0a2efb7261..5d3f986cffc6840e1685def4edab4b56bc3ad12c 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-id-init-unresolvable.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-id-init-unresolvable.js
@@ -60,6 +60,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, ReferenceError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, ReferenceError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-list-err.js b/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-list-err.js
index ce5ff77d4738e15348b25e3142b924c1eb54fe48..c47cc288c02e2db2857a7b631b8ee9fca730806f 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-list-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-list-err.js
@@ -55,7 +55,7 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-ary-value-null.js b/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-ary-value-null.js
index be9556f0f8dd5bc799f08ff503c7b6f35913987e..a212dc8673a7b09e78d20f106ce42d014a4808c0 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-ary-value-null.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-ary-value-null.js
@@ -51,6 +51,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-eval-err.js b/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-eval-err.js
index 0f682cbaf59b35b61680fc41584ad2665eaa2adf..58a568c33d61d6edd179b2fe8da484332fd9a6e0 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-eval-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-eval-err.js
@@ -53,6 +53,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-id-get-value-err.js b/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-id-get-value-err.js
index 496b7fb325682fef0268061032e16941c2aad0fe..03eb78ef3877260c4f042068c4b12e8ff083b998 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-id-get-value-err.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-id-get-value-err.js
@@ -56,7 +56,7 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-id-init-throws.js b/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-id-init-throws.js
index a03dcad4f3995ff89e7b6501eadc642cdec9549a..cbdafa9390e59ec8ecc458a3e7cd61a4b958dc8e 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-id-init-throws.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-id-init-throws.js
@@ -56,6 +56,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, Test262Error))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, Test262Error))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-id-init-unresolvable.js b/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-id-init-unresolvable.js
index 2da010c1591c19ab5806ef6e692460dcef85d423..5d2f42a843a08c4a0d00d5bfcc4c51f98562232c 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-id-init-unresolvable.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-id-init-unresolvable.js
@@ -60,6 +60,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, ReferenceError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, ReferenceError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-obj-value-null.js b/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-obj-value-null.js
index 17ad2d3f61f4b87e16ea9457f76037200ce822af..b273cd5454ab1cb66b8693afa0761ab0592ec894 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-obj-value-null.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-obj-value-null.js
@@ -51,6 +51,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);
 
diff --git a/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-obj-value-undef.js b/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-obj-value-undef.js
index 20a1a2213ee287f6746571e8ac7b939d13975d8f..60ccd93a752305d26e038a7c0b5eb71929672e57 100644
--- a/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-obj-value-undef.js
+++ b/test/language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-obj-value-undef.js
@@ -51,6 +51,6 @@ async function * gen() {
 }
 
 gen().next()
-  .then(_ => throw new Test262Error("Expected async function to reject, but resolved."), ({ constructor }) => assert.sameValue(constructor, TypeError))
+  .then(_ => { throw new Test262Error("Expected async function to reject, but resolved."); }, ({ constructor }) => assert.sameValue(constructor, TypeError))
   .then($DONE, $DONE);