diff --git a/tests/lib/linter/linter.js b/tests/lib/linter/linter.js
index e61804d3ae7..adce5a39d86 100644
--- a/tests/lib/linter/linter.js
+++ b/tests/lib/linter/linter.js
@@ -3401,7 +3401,6 @@ var a = "test2";
                     return {};
                 });
 
-                linter.defineRule("checker", filenameChecker);
                 linter.defineRule("checker", filenameChecker);
                 linter.verify("foo;", { rules: { checker: "error" } }, { filename: "foo.js" });
                 assert(filenameChecker.calledOnce);