diff --git a/pkg/response/response.go b/pkg/response/response.go
index bb89236..03beeef 100644
--- a/pkg/response/response.go
+++ b/pkg/response/response.go
@@ -17,6 +17,18 @@ const (
 	InvalidRequestErrorType   ErrorType = "INVALID_REQUEST"
 )
 
+type errorResponseWriter struct{}
+
+func (e *errorResponseWriter) Header() http.Header {
+	return http.Header{}
+}
+
+func (e *errorResponseWriter) Write([]byte) (int, error) {
+	return 0, errors.New("write error")
+}
+
+func (e *errorResponseWriter) WriteHeader(statusCode int) {}
+
 func SendAck(w http.ResponseWriter) {
 	resp := &model.Response{
 		Message: model.Message{
diff --git a/pkg/response/response_test.go b/pkg/response/response_test.go
index 2544bb9..437d779 100644
--- a/pkg/response/response_test.go
+++ b/pkg/response/response_test.go
@@ -165,3 +165,10 @@ func compareJSON(expected, actual map[string]interface{}) bool {
 	actualBytes, _ := json.Marshal(actual)
 	return bytes.Equal(expectedBytes, actualBytes)
 }
+
+
+func TestSendAck_WriteError(t *testing.T) {
+	w := &errorResponseWriter{}
+	SendAck(w)
+	// No need to assert, just ensure it doesn't panic
+}