Test (and fix) raising error on Django 4.2.

django_filters/filters.py

@@ -491,7 +491,7 @@ def __init__(self, choices=None, filters=None, *args, **kwargs):
             if DJANGO_50:
                 self.choices = normalize_choices(self.choices)
             else:
-                assert not DJANGO_50, "Django 5.0 or later is required for dict choices"
+                raise ValueError("Django 5.0 or later is required for dict choices")
 
         all_choices = list(
             chain.from_iterable(

tests/test_filters.py

@@ -1113,6 +1113,16 @@ def test_grouped_choices_as_dictionary(self):
             choices={"group": {"a": "a", "b": "b"}}, filters={"a": None, "b": None}
         )
 
+    @unittest.skipUnless(django.VERSION <= (4, 2), "Django 5.0 introduced new dictionary choices option")
+    def test_grouped_choices_error(self):
+        with self.assertRaisesMessage(
+            ValueError,
+            "Django 5.0 or later is required for dict choices"
+        ):
+            DateRangeFilter(
+                choices={"group": {"a": "a", "b": "b"}}, filters={"a": None, "b": None}
+            )
+
     def test_filtering_for_this_year(self):
         qs = mock.Mock(spec=["filter"])
         with mock.patch("django_filters.filters.now") as mock_now: