diff --git a/test/built-ins/Atomics/wait/did-timeout.js b/test/built-ins/Atomics/wait/did-timeout.js
index 337a45bbc90f04686eba89164376f2833010dbdc..908d0382d44678225e1c47f7ff1c7dbfab39d4fb 100644
--- a/test/built-ins/Atomics/wait/did-timeout.js
+++ b/test/built-ins/Atomics/wait/did-timeout.js
@@ -24,10 +24,10 @@ $262.agent.receiveBroadcast(function (sab, id) {
 var ia = new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT));
 
 $262.agent.broadcast(ia.buffer);
+
 assert.sameValue(getReport(), "timed-out");
 assert.sameValue((getReport() | 0) >= 500 - $ATOMICS_MAX_TIME_EPSILON, true);
 
-
 function getReport() {
   var r;
   while ((r = $262.agent.getReport()) == null)
diff --git a/test/built-ins/Atomics/wait/negative-timeout.js b/test/built-ins/Atomics/wait/negative-timeout.js
index 84ce5ce1901acb0457deb0cff68a982bb9f359ec..6b91448211bbb8bcda6b87456f2f6e2ec38f0ed8 100644
--- a/test/built-ins/Atomics/wait/negative-timeout.js
+++ b/test/built-ins/Atomics/wait/negative-timeout.js
@@ -28,3 +28,5 @@ function getReport() {
     $262.agent.sleep(100);
   return r;
 }
+
+assert.sameValue(Atomics.wake(ia, 0), 0);
diff --git a/test/built-ins/Atomics/wait/poisoned-object-for-timeout-throws.js b/test/built-ins/Atomics/wait/poisoned-object-for-timeout-throws.js
index 0ca369b12a882b49a1fef92fc6322e4ddc3d73f6..2145a37be05be503db3c4f28757cdb79384da163 100644
--- a/test/built-ins/Atomics/wait/poisoned-object-for-timeout-throws.js
+++ b/test/built-ins/Atomics/wait/poisoned-object-for-timeout-throws.js
@@ -31,21 +31,20 @@ function getReport() {
 $262.agent.start(
   `
 $262.agent.receiveBroadcast(function (sab) {
- 
-  var int32Array = new Int32Array(sab);  
+  
+  var int32Array = new Int32Array(sab);
+
   var poisoned = {
     valueOf: false,
     toString: false
   };
-  var err;
   
   try {
     Atomics.wait(int32Array, 0, 0, poisoned);
   } catch(e) {
-    err = e.name;
+    $262.agent.report(e.name);
   }
-  
-  $262.agent.report(err);
+
   $262.agent.leaving();
 })
 `);
@@ -55,6 +54,8 @@ var int32Array = new Int32Array(sab);
 
 $262.agent.broadcast(int32Array.buffer);
 
+$262.agent.sleep(150);
+
 assert.sameValue(getReport(), 'TypeError');
 
 assert.sameValue(Atomics.wake(int32Array, 0), 0);
diff --git a/test/built-ins/Atomics/wait/symbol-for-timeout-throws.js b/test/built-ins/Atomics/wait/symbol-for-timeout-throws.js
index dd003bf5e7da749404a078ed8750c49f8f8fc74e..9a46c15fb297d79c975f84ab9d4870a07c891803 100644
--- a/test/built-ins/Atomics/wait/symbol-for-timeout-throws.js
+++ b/test/built-ins/Atomics/wait/symbol-for-timeout-throws.js
@@ -27,15 +27,13 @@ $262.agent.start(
 $262.agent.receiveBroadcast(function (sab) {  
 
   var int32Array = new Int32Array(sab);
-  var err;
   
   try {
     Atomics.wait(int32Array, 0, 0, Symbol('foo'));
   } catch(e) {
-    err = e.name;
+   $262.agent.report(e.name);
   }
   
-  $262.agent.report(err);
   $262.agent.leaving();
 })
 `);
@@ -45,4 +43,8 @@ var int32Array = new Int32Array(sab);
 
 $262.agent.broadcast(int32Array.buffer);
 
+$262.agent.sleep(150);
+
 assert.sameValue(getReport(), 'TypeError');
+
+assert.sameValue(Atomics.wake(int32Array, 0), 0);
diff --git a/test/built-ins/Atomics/wait/true-for-timeout.js b/test/built-ins/Atomics/wait/true-for-timeout.js
index fd4f4e62ce724731e2d745ebef781fd9e43c35ac..8fc9d331f36b57aa075b7b1a2568cba677bcac08 100644
--- a/test/built-ins/Atomics/wait/true-for-timeout.js
+++ b/test/built-ins/Atomics/wait/true-for-timeout.js
@@ -38,7 +38,7 @@ var int32Array = new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEME
 
 $262.agent.broadcast(int32Array.buffer);
 
-$262.agent.sleep(2);
+$262.agent.sleep(150);
 
 var r1 = getReport();
 var r2 = getReport();
diff --git a/test/built-ins/Atomics/wait/wait-index-value-not-equal.js b/test/built-ins/Atomics/wait/wait-index-value-not-equal.js
index b40986abc99fa6ec18cd76f75b95564101f237b9..23484d79702b93bb79396432333c8e7e0be1e469 100644
--- a/test/built-ins/Atomics/wait/wait-index-value-not-equal.js
+++ b/test/built-ins/Atomics/wait/wait-index-value-not-equal.js
@@ -17,9 +17,8 @@ features: [ Atomics, SharedArrayBuffer, TypedArray ]
 
 function getReport() {
   var r;
-  while ((r = $262.agent.getReport()) == null) {
+  while ((r = $262.agent.getReport()) == null)
     $262.agent.sleep(100);
-  }
   return r;
 }