diff --git a/eox_nelp/api_clients/__init__.py b/eox_nelp/api_clients/__init__.py
index e845964a..637263f1 100644
--- a/eox_nelp/api_clients/__init__.py
+++ b/eox_nelp/api_clients/__init__.py
@@ -93,7 +93,10 @@ def make_post(self, path, data):
             response.status_code,
         )
 
-        return {}
+        return {
+            "error": True,
+            "message": f"Invalid response with status {response.status_code}"
+        }
 
     def make_get(self, path, payload):
         """This method uses the session attribute to perform a GET request based on the
@@ -120,4 +123,7 @@ def make_get(self, path, payload):
             response.status_code,
         )
 
-        return {}
+        return {
+            "error": True,
+            "message": f"Invalid response with status {response.status_code}"
+        }
diff --git a/eox_nelp/api_clients/tests/__init__.py b/eox_nelp/api_clients/tests/__init__.py
index 2ee3ef21..8cb11cd7 100644
--- a/eox_nelp/api_clients/tests/__init__.py
+++ b/eox_nelp/api_clients/tests/__init__.py
@@ -108,7 +108,7 @@ def test_failed_post(self, auth_mock, requests_mock):
         with self.assertLogs(api_clients.__name__, level="ERROR") as logs:
             response = api_client.make_post("fake/path", data)
 
-        self.assertDictEqual(response, {})
+        self.assertDictEqual(response, {'error': True, 'message': 'Invalid request with status 400'})
         requests_mock.Session.return_value.post.assert_called_with(
             url=f"{api_client.base_url}/fake/path",
             json=data,
@@ -169,7 +169,7 @@ def test_failed_get(self, auth_mock, requests_mock):
         with self.assertLogs(api_clients.__name__, level="ERROR") as logs:
             response = api_client.make_get("fake/path", params)
 
-        self.assertDictEqual(response, {})
+        self.assertDictEqual(response, {'error': True, 'message': 'Invalid request with status 404'})
         requests_mock.Session.return_value.get.assert_called_with(
             url=f"{api_client.base_url}/fake/path",
             params=params,
diff --git a/eox_nelp/api_clients/tests/tests_futurex.py b/eox_nelp/api_clients/tests/tests_futurex.py
index a9104ca3..01276806 100644
--- a/eox_nelp/api_clients/tests/tests_futurex.py
+++ b/eox_nelp/api_clients/tests/tests_futurex.py
@@ -41,7 +41,7 @@ def test_enrollment_progress(self, auth_mock, post_mock):
             "enrolledAt": "2012-12-30",
             "isCompleted": False,
         }
-        api_client = FuturexApiClient()
+        api_client = self.api_class()
 
         response = api_client.enrollment_progress(data)
 
@@ -61,6 +61,6 @@ def test_failed_enrollment_progress(self, auth_mock):
             "userId": 52,
             "approxTotalCourseHrs": 5,
         }
-        api_client = FuturexApiClient()
+        api_client = self.api_class()
 
         self.assertRaises(FuturexMissingArguments, api_client.enrollment_progress, data)