ci: run artifact-aware module matrix tests

tests/test_release_integration.py

@@ -91,6 +91,14 @@ class ReleaseIntegrationTests(unittest.TestCase):
         self.assertLess(core_tests, module_tests)
         self.assertNotIn('"$PYTHON" -m unittest \\\n  tests.test_module_system', script)
 
+    def test_module_matrix_uses_artifact_aware_core_suite(self) -> None:
+        meta_root = Path(__file__).resolve().parents[1]
+        script = (meta_root / "tools" / "checks" / "check-module-matrix.sh").read_text(encoding="utf-8")
+
+        self.assertIn('"$META_ROOT/tools/checks/release_integration.py" core-tests', script)
+        self.assertIn('--core-root "$ROOT"', script)
+        self.assertNotIn('"$PYTHON" -m unittest tests.test_module_system', script)
+
 
 if __name__ == "__main__":
     unittest.main()