diff --git a/tests/test_server.py b/tests/test_server.py
index 93d3226f63..3fb388eabb 100644
--- a/tests/test_server.py
+++ b/tests/test_server.py
@@ -99,6 +99,7 @@ def test_simple(self):
     def test_remote_butler(self):
         universe = self.butler.dimensions
         self.assertEqual(universe.namespace, "daf_butler")
+        self.assertFalse(self.butler.isWriteable())
 
     def test_get_dataset_type(self):
         bias_type = self.butler.get_dataset_type("bias")