diff --git a/gio/tests/memory-monitor-dbus.py.in b/gio/tests/memory-monitor-dbus.py.in
index d975e34af..f0b7a2515 100755
--- a/gio/tests/memory-monitor-dbus.py.in
+++ b/gio/tests/memory-monitor-dbus.py.in
@@ -57,6 +57,14 @@ try:
             fcntl.fcntl(self.p_mock.stdout, fcntl.F_SETFL, flags | os.O_NONBLOCK)
             self.last_warning = -1
             self.dbusmock = dbus.Interface(self.obj_lmm, dbusmock.MOCK_IFACE)
+
+            try:
+                self.wait_for_bus_object('org.freedesktop.LowMemoryMonitor',
+                                        '/org/freedesktop/LowMemoryMonitor',
+                                        system_bus=True)
+            except:
+                raise
+
             self.memory_monitor = Gio.MemoryMonitor.dup_default()
             assert("GMemoryMonitorDBus" in str(self.memory_monitor))
             self.memory_monitor.connect("low-memory-warning", self.memory_warning_cb)