diff --git a/tests/conftest.py b/tests/conftest.py
index 01914ae77..11a079f48 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -15,6 +15,7 @@ def pytest_configure(config):
 
     settings.configure(
         DEBUG_PROPAGATE_EXCEPTIONS=True,
+        DEFAULT_AUTO_FIELD="django.db.models.AutoField",
         DATABASES={
             'default': {
                 'ENGINE': 'django.db.backends.sqlite3',