diff --git a/spec/api-ipc-spec.js b/spec/api-ipc-spec.js
index e98db97107d1..0d9ba0ddeefd 100644
--- a/spec/api-ipc-spec.js
+++ b/spec/api-ipc-spec.js
@@ -37,7 +37,7 @@ describe('ipc module', function () {
       assert.equal(a.bar, 1234)
       assert.equal(a.anonymous.constructor.name, '')
       assert.equal(a.getConstructorName(Object.create(null)), '')
-      assert.equal(a.getConstructorName(new class {}), '')
+      assert.equal(a.getConstructorName(new (class {})), '')
     })
 
     it('should search module from the user app', function () {
diff --git a/spec/fixtures/module/no-prototype.js b/spec/fixtures/module/no-prototype.js
index 4d3268199845..46cc4fe83855 100644
--- a/spec/fixtures/module/no-prototype.js
+++ b/spec/fixtures/module/no-prototype.js
@@ -4,7 +4,7 @@ foo.baz = false
 module.exports = {
   foo: foo,
   bar: 1234,
-  anonymous: new class {},
+  anonymous: new (class {}),
   getConstructorName: function (value) {
     return value.constructor.name
   }