diff --git a/test/compress/issue-2871.js b/test/compress/issue-2871.js
index 2012264e..bca77fe4 100644
--- a/test/compress/issue-2871.js
+++ b/test/compress/issue-2871.js
@@ -7,11 +7,31 @@ comparison_with_undefined: {
         a != undefined
         a === undefined
         a !== undefined
+
+        undefined == a
+        undefined != a
+        undefined === a
+        undefined !== a
+
+        void 0 == a
+        void 0 != a
+        void 0 === a
+        void 0 !== a
     }
     expect: {
         null == a
         null != a
         void 0 === a
         void 0 !== a
+
+        null == a
+        null != a
+        void 0 === a
+        void 0 !== a
+
+        null == a
+        null != a
+        void 0 === a
+        void 0 !== a
     }
 }