diff --git a/tests/unit/test_events.py b/tests/unit/test_events.py
index 23f3fac2770..97debf74c2a 100644
--- a/tests/unit/test_events.py
+++ b/tests/unit/test_events.py
@@ -193,7 +193,7 @@ def test_event_codes(self):
     types.FinishedRunningStats(stat_line="", execution="", execution_time=0),
     types.ConstraintNotEnforced(constraint="", adapter=""),
     types.ConstraintNotSupported(constraint="", adapter=""),
-    types.TypeCodeNotFound(type_code=""),
+    types.TypeCodeNotFound(type_code=0),
     # I - Project parsing ======================
     types.InputFileDiffError(category="testing", file_id="my_file"),
     types.InvalidValueForField(field_name="test", field_value="test"),