diff --git a/packages/babel-plugin-transform-class-properties/test/fixtures/compile-to-class/constructor-collision-ignores-types/expected.js b/packages/babel-plugin-transform-class-properties/test/fixtures/compile-to-class/constructor-collision-ignores-types/expected.js
index 18cbcb0e7e..7973ee68a0 100644
--- a/packages/babel-plugin-transform-class-properties/test/fixtures/compile-to-class/constructor-collision-ignores-types/expected.js
+++ b/packages/babel-plugin-transform-class-properties/test/fixtures/compile-to-class/constructor-collision-ignores-types/expected.js
@@ -1,7 +1,16 @@
 class C {
   // Output should not use `_initialiseProps`
   constructor(T) {
-    this.y = 0;
+    Object.defineProperty(this, "x", {
+      enumerable: true,
+      writable: true,
+      value: void 0
+    });
+    Object.defineProperty(this, "y", {
+      enumerable: true,
+      writable: true,
+      value: 0
+    });
   }
 
 }