--- a
+++ b/tests/functional/test_assure.py
@@ -0,0 +1,9 @@
+from pathlib import Path
+
+
+FIXTURES_PATH = Path(__file__).parents[1] / "fixtures" / "good_definition_files"
+
+
+def test_assure(call_cli):
+    captured = call_cli("assure", FIXTURES_PATH / "assurance.py")
+    assert "All OK" in captured.out