diff --git a/src/interceptors/response.ts b/src/interceptors/response.ts
index f7e1957..f160c9a 100644
--- a/src/interceptors/response.ts
+++ b/src/interceptors/response.ts
@@ -32,6 +32,18 @@ export function defaultResponseInterceptor(
   };
 
   const onFulfilled: ResponseInterceptor['onFulfilled'] = async (response) => {
+    // When response.config is not present, the response is indeed a error.
+    if (!response.config) {
+      if (__ACI_DEV__) {
+        axios.debug?.({
+          msg: 'Response interceptor received an unknown response.',
+          data: response
+        });
+
+        throw response;
+      }
+    }
+
     const id = (response.id = response.config.id ??= axios.generateKey(response.config));
     response.cached ??= false;
 
diff --git a/test/interceptors/response.test.ts b/test/interceptors/response.test.ts
index f2d3628..1b9c1bf 100644
--- a/test/interceptors/response.test.ts
+++ b/test/interceptors/response.test.ts
@@ -252,4 +252,20 @@ describe('test response interceptor', () => {
     expect(cache.state).not.toBe('loading');
     expect(cache.state).toBe('empty');
   });
+
+  it('expects response interceptor handles non response errors', async () => {
+    const instance = Axios.create();
+
+    const NOT_RESPONSE = { notAResponse: true };
+
+    //@ts-expect-error - this is indeed wrongly behavior
+    instance.interceptors.response.use(() => NOT_RESPONSE);
+
+    const axios = mockAxios(undefined, undefined, instance);
+
+    await expect(
+      // just calls the response interceptor
+      axios.get('url')
+    ).rejects.toBe(NOT_RESPONSE);
+  });
 });