diff --git a/test/rhsmlib/dbus/test_register.py b/test/rhsmlib/dbus/test_register.py
index e114a257e6..5556d1fe4f 100644
--- a/test/rhsmlib/dbus/test_register.py
+++ b/test/rhsmlib/dbus/test_register.py
@@ -340,6 +340,13 @@ def setUp(self) -> None:
         get_cmd_line_mock = get_cmd_line_patch.start()
         get_cmd_line_mock.return_value = "unit-test sender"
 
+        pid_of_sender_patch = mock.patch(
+            "rhsmlib.dbus.server.pid_of_sender",
+            autospec=True,
+        )
+        pid_of_sender_mock = pid_of_sender_patch.start()
+        pid_of_sender_mock.return_value = 123456
+
         dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
 
     def tearDown(self) -> None: