| Index: tests/compiler/dart2js/dictionary_types_test.dart
 | 
| diff --git a/tests/compiler/dart2js/dictionary_types_test.dart b/tests/compiler/dart2js/dictionary_types_test.dart
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| index afe9db55249c446174ffa374db61b68ac60c85bc..077250e3b25386e875b539a588f049a8a711358a 100644
 | 
| --- a/tests/compiler/dart2js/dictionary_types_test.dart
 | 
| +++ b/tests/compiler/dart2js/dictionary_types_test.dart
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| @@ -112,7 +112,8 @@ void main() {
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|      });
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|      await compileAndTest("Union.dart", (types, getType, compiler) {
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|        Expect.equals(getType('nullOrInt'), types.uint31Type.nullable());
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| -      Expect.isTrue(getType('aString').containsOnlyString(compiler.world));
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| +      Expect.isTrue(getType('aString').containsOnlyString(
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| +          compiler.closedWorld));
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|        Expect.equals(getType('doubleOrNull'), types.doubleType.nullable());
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|      });
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|      await compileAndTest("ValueType.dart", (types, getType, compiler) {
 | 
| 
 |