diff --git a/grpclog/loggerv2_test.go b/grpclog/loggerv2_test.go
index 756f215f9c86..6961057c5c16 100644
--- a/grpclog/loggerv2_test.go
+++ b/grpclog/loggerv2_test.go
@@ -54,7 +54,7 @@ func TestLoggerV2Severity(t *testing.T) {
 // check if b is in the format of:
 //  WARNING: 2017/04/07 14:55:42 WARNING
 func checkLogForSeverity(s int, b []byte) error {
-	expected := regexp.MustCompile(fmt.Sprintf(`^%s: [0-9]{4}/[0-9]{2}/[0-9]{2} [0-9]{2}:[0-9]{2}:[0-9]{2} %s\n$`, severityName[s], severityName[s]))
+	expected := regexp.MustCompile(fmt.Sprintf(`^[0-9]{4}/[0-9]{2}/[0-9]{2} [0-9]{2}:[0-9]{2}:[0-9]{2} %s: %s\n$`, severityName[s], severityName[s]))
 	if m := expected.Match(b); !m {
 		return fmt.Errorf("got: %v, want string in format of: %v", string(b), severityName[s]+": 2016/10/05 17:09:26 "+severityName[s])
 	}