diff --git a/src/tests/test_protectAllClasses.py b/src/tests/test_protectAllClasses.py
new file mode 100644
index 0000000000..17c92722d4
--- /dev/null
+++ b/src/tests/test_protectAllClasses.py
@@ -0,0 +1,20 @@
+
+from Basilisk.moduleTemplates import cModuleTemplate
+from Basilisk.moduleTemplates import cppModuleTemplate
+
+import numpy.testing as npt
+
+def test_protectAllClassesRaises():
+    mod1 = cModuleTemplate.cModuleTemplate()
+    mod2 = cppModuleTemplate.CppModuleTemplate()
+
+    expected_ex = "You tried to add this variable(.*)"
+
+    with npt.assert_raises_regex(ValueError, expected_ex):
+        mod1.error = "error"
+
+    with npt.assert_raises_regex(ValueError, expected_ex):
+        mod2.error = "error"
+
+if __name__ == "__main__":
+    test_protectAllClassesRaises()