diff --git a/test/built-ins/BigInt/asUintN/bits-toindex.js b/test/built-ins/BigInt/asUintN/bits-toindex.js
index 2ef49340ca49bcaeab95b47f96180ca5df0b382d..0d999c242e84412cf4025ef9bb76f0eba0080606 100644
--- a/test/built-ins/BigInt/asUintN/bits-toindex.js
+++ b/test/built-ins/BigInt/asUintN/bits-toindex.js
@@ -17,7 +17,7 @@ testCoercibleToIndexZero(function(zero) {
 });
 
 testCoercibleToIndexOne(function(one) {
-  assert.sameValue(BigInt.asUintN(one, 1n), 0n);
+  assert.sameValue(BigInt.asUintN(one, 1n), 1n);
 });
 
 testCoercibleToIndexFromIndex(3, function(three) {