diff --git a/assets/test/templates/option/function.tmpl b/assets/test/templates/option/function.tmpl
index 78b8bb9e79..ff4876f934 100644
--- a/assets/test/templates/option/function.tmpl
+++ b/assets/test/templates/option/function.tmpl
@@ -2,6 +2,7 @@
 {{- $f := . }}
 
 func {{ .TestName }}(t *testing.T) {
+    // Change interface type to the type of object you are testing
     type T = interface{}
     {{- if .TestParameters }}
     type args struct {