diff --git a/tests.js b/tests.js
index b8d6fbc..d8a505b 100644
--- a/tests.js
+++ b/tests.js
@@ -333,11 +333,6 @@ var TESTS = [
     css: "null\\0",
     expected: [{type: "IDENT", value: "null\uFFFD"}, {type: "EOF"}],
   },
-  {
-    parser: "",
-    css: "null\\0",
-    expected: [{type: "IDENT", value: "null\uFFFD"}, {type: "EOF"}],
-  },
   {
     parser: "",
     css: "null\\0000",