diff --git a/types/dynamic/dynamic_test.go b/types/dynamic/dynamic_test.go
index 425aaf0d07..b6d3e2e476 100644
--- a/types/dynamic/dynamic_test.go
+++ b/types/dynamic/dynamic_test.go
@@ -100,8 +100,8 @@ func (m MyType) MarshalJSON() ([]byte, error) {
 }
 
 func (m *MyType) UnmarshalJSON(p []byte) error {
-	type __ MyType
-	var x __
+	type temporary MyType
+	var x temporary
 	if err := json.Unmarshal(p, &x); err != nil {
 		return err
 	}