diff --git a/ophyd/tests/test_device.py b/ophyd/tests/test_device.py
index afab41855..926bbab53 100644
--- a/ophyd/tests/test_device.py
+++ b/ophyd/tests/test_device.py
@@ -950,7 +950,7 @@ class MyDevice(Device):
     "initial, after",
     [
         [False, True],
-        [0, 0],
+        [0, 1],
         ["", "1!"],
     ],
 )