diff --git a/test/parallel/test-v8-flags.js b/test/parallel/test-v8-flags.js
index e476c5e3886661..e8129b3406658e 100644
--- a/test/parallel/test-v8-flags.js
+++ b/test/parallel/test-v8-flags.js
@@ -8,11 +8,11 @@ const vm = require('vm');
 // Specifically here, V8 may cache compiled scripts between the flip of the
 // flag. We use a different script each time to work around this problem.
 v8.setFlagsFromString('--allow_natives_syntax');
-assert(eval('%_IsSmi(42)'));
-assert(vm.runInThisContext('%_IsSmi(43)'));
+assert(eval('%IsSmi(42)'));
+assert(vm.runInThisContext('%IsSmi(43)'));
 
 v8.setFlagsFromString('--noallow_natives_syntax');
-assert.throws(function() { eval('%_IsSmi(44)'); },
+assert.throws(function() { eval('%IsSmi(44)'); },
               /^SyntaxError: Unexpected token '%'$/);
-assert.throws(function() { vm.runInThisContext('%_IsSmi(45)'); },
+assert.throws(function() { vm.runInThisContext('%IsSmi(45)'); },
               /^SyntaxError: Unexpected token '%'$/);