diff --git a/tests/conftest.py b/tests/conftest.py
new file mode 100644
index 0000000..fbd06c3
--- /dev/null
+++ b/tests/conftest.py
@@ -0,0 +1,9 @@
+import pytest
+
+from drf_pydantic.parse import SERIALIZER_REGISTRY
+
+
+@pytest.fixture(autouse=True, scope="function")
+def reset_serializers():
+    SERIALIZER_REGISTRY.clear()
+    assert len(SERIALIZER_REGISTRY) == 0