Django client tests requests wrong path

I am building django REST app with mixins:

ModelViewSet(mixins.RetrieveModelMixin, mixins.CreateModelMixin)
    queryset = Model.objects.all()
    (...)

and retrieve() is visible in localhost:8000/model/<uuid> Then I add a function for counting all Model instances:

    @action(detail=False, methods=["GET"], url_path="count")
    def get_model_count(self, request):
        queryset = self.get_queryset()
        data = {"count": queryset.count()}
        return Response(status=status.HTTP_200_OK, data=data)

Then when I try to test it:

    def test_model_count(self):
        list_size = 10
        for i in range(list_size):
            response = self.create_model()
            self.assertEqual(response.status_code, 200, response.content)
        response = self.client.get(reverse("model-get-model-count"))
        self.assertEqual(response.status_code, 200, response.content)

I get this error: AssertionError: 400 != 200 : b"Invalid parameter robot_id value: 'all' is not a 'uuid'"

Interesting part is that when I use web or curl, everything works fine, I can get count correctly, I can get model details, I can create new model. I tried changing the order, so count is implemented first, before retrieve but the error still exists. Hope I provided enough of information, thanks in advance