diff --git a/cc/testing.go b/cc/testing.go
index 6a655db..992069b 100644
--- a/cc/testing.go
+++ b/cc/testing.go
@@ -739,12 +739,13 @@
 }
 
 func checkOverrides(t *testing.T, ctx *android.TestContext, singleton android.TestingSingleton, jsonPath string, expected []string) {
+	t.Helper()
 	out := singleton.MaybeOutput(jsonPath)
 	content := android.ContentFromFileRuleForTests(t, out)
 
 	var flags snapshotJsonFlags
 	if err := json.Unmarshal([]byte(content), &flags); err != nil {
-		t.Errorf("Error while unmarshalling json %q: %w", jsonPath, err)
+		t.Errorf("Error while unmarshalling json %q: %s", jsonPath, err.Error())
 		return
 	}