diff --git a/backend/tests/teachers_test.py b/backend/tests/teachers_test.py
index 74b12a0e..e76d29fa 100644
--- a/backend/tests/teachers_test.py
+++ b/backend/tests/teachers_test.py
@@ -15,7 +15,7 @@ def setUp(self) -> None:
     def test_create_teacher_bad_request(self) -> None:
         response = self.app.post("/teachers", data={})
         assert response.status_code == HTTPStatus.BAD_REQUEST
-        assert "error" in response.text
+        assert "error" in json.loads(response.text)
 
     def test_create_teacher_success(self) -> None:
         teacher_data = {"name": "Bart De Bruyn"}