diff --git a/cmd/util_test.go b/cmd/util_test.go
index 09514314187..1fc25d17320 100644
--- a/cmd/util_test.go
+++ b/cmd/util_test.go
@@ -63,7 +63,7 @@ func (s *utilsSuite) TestVerifyPdEndpoint(c *check.C) {
 	c.Assert(verifyPdEndpoint(url, false), check.ErrorMatches, ".*PD endpoint should be a valid http or https URL.*")
 
 	// invalid URL.
-	url = "\n hi"
+	url = "\r hi"
 	c.Assert(verifyPdEndpoint(url, false), check.ErrorMatches, ".*invalid control character in URL.*")
 
 	// http URL without host.