diff --git a/git-codereview/go19_test.go b/git-codereview/go19_test.go
index 784ec41..c2dc46e 100644
--- a/git-codereview/go19_test.go
+++ b/git-codereview/go19_test.go
@@ -9,5 +9,5 @@
 import "testing"
 
 func init() {
-	setHelper = func(t *testing.T) { t.Helper() }
+	setHelper = (*testing.T).Helper
 }