Use in-memory channel layers in tests

src/conftest.py

@@ -0,0 +1,11 @@
+import pytest
+from pytest_django.fixtures import SettingsWrapper
+
+
+@pytest.fixture(autouse=True)
+def in_memory_channel_layers(settings: SettingsWrapper) -> None:
+    settings.CHANNEL_LAYERS = {
+        "default": {
+            "BACKEND": "channels.layers.InMemoryChannelLayer",
+        },
+    }