diff --git a/oxr/tests/test_core.py b/oxr/tests/test_core.py
index e69de29..1666a09 100644
--- a/oxr/tests/test_core.py
+++ b/oxr/tests/test_core.py
@@ -0,0 +1,5 @@
+from __future__ import annotations
+
+
+def test_init() -> None:
+    assert True