a === b -> identical(a, b)

tests/language/const_nested_test.dart

Index: tests/language/const_nested_test.dart
diff --git a/tests/language/const_nested_test.dart b/tests/language/const_nested_test.dart
index 263aabe5f908b23c895858d86a3d227ea26322c6..962c1eb48dee5a84dbd0aed2a39ba7a0c12b6809 100644
--- a/tests/language/const_nested_test.dart
+++ b/tests/language/const_nested_test.dart
@@ -22,13 +22,13 @@ getClosure() {
     Expect.equals(65535, MASK);
     // Refer to compile time constant local variables in outer scope.
     const s = 'MIN = $MIN  MAX = $MAX  MASK = $MASK';
-    Expect.isTrue(s === 'MIN = $MIN  MAX = $MAX  MASK = $MASK');
+    Expect.isTrue(identical(s, 'MIN = $MIN  MAX = $MAX  MASK = $MASK'));
     Expect.equals("MIN = 1  MAX = 16  MASK = 65535", s);
     var cf1 = const ConstFoo(MASK);
     var cf2 = const ConstFoo(s);
     var cf3 = const ConstFoo('MIN = $MIN  MAX = $MAX  MASK = $MASK');
-    Expect.isTrue(cf2 === cf3);
-    Expect.isFalse(cf2 === cf1);
+    Expect.isTrue(identical(cf2, cf3));
+    Expect.isFalse(identical(cf2, cf1));
   }
 
   return foo;