diff --git a/tests/test_cli_security.py b/tests/test_cli_security.py
index ec9a7ea..16ce614 100644
--- a/tests/test_cli_security.py
+++ b/tests/test_cli_security.py
@@ -18,7 +18,10 @@ def load_fpaste_module():
     )
     if spec is None or spec.loader is None:
         pytest.skip("Could not load fpaste module")
+        return None  # unreachable, but helps mypy
 
+    assert spec is not None  # mypy: narrow type after skip
+    assert spec.loader is not None
     fpaste = importlib.util.module_from_spec(spec)
     sys.modules["fpaste"] = fpaste
     spec.loader.exec_module(fpaste)