diff --git a/api/internal/plugins/execplugin/execplugin_test.go b/api/internal/plugins/execplugin/execplugin_test.go
index 998229cfa..9d6a3fc60 100644
--- a/api/internal/plugins/execplugin/execplugin_test.go
+++ b/api/internal/plugins/execplugin/execplugin_test.go
@@ -47,7 +47,7 @@ s/$BAR/bar/g
 			"argsFromFile": "sed-input.txt",
 		})
 
-	ldr.AddFile("/app/sed-input.txt", []byte(`
+	fSys.WriteFile("/app/sed-input.txt", []byte(`
 s/$FOO/foo/g
 s/$BAR/bar baz/g
  \ \ \