diff --git a/tests/sentry/issues/action_log/test_types.py b/tests/sentry/issues/action_log/test_types.py
new file mode 100644
index 000000000000..9f6abc1960dd
--- /dev/null
+++ b/tests/sentry/issues/action_log/test_types.py
@@ -0,0 +1,11 @@
+from sentry.issues.action_log.types import GroupAction, GroupActionType
+from sentry.testutils.cases import TestCase
+
+
+class GroupActionRegistrationTest(TestCase):
+    def test_all_types_are_registered(self) -> None:
+        missing = [member for member in GroupActionType if GroupAction.by_type(member) is None]
+        assert missing == [], (
+            f"GroupActionType members without a registered GroupAction subclass: "
+            f"{[m.name for m in missing]}"
+        )