diff --git a/zaza/openstack/charm_tests/glance/tests.py b/zaza/openstack/charm_tests/glance/tests.py
index 001f17f..4f25d81 100644
--- a/zaza/openstack/charm_tests/glance/tests.py
+++ b/zaza/openstack/charm_tests/glance/tests.py
@@ -67,6 +67,44 @@ class GlanceTest(test_utils.OpenStackBaseTest):
             {'image_format': {'disk_formats': ['qcow2']}},
             ['glance-api'])
 
+    def test_900_restart_on_config_change(self):
+        """Checking restart happens on config change."""
+        # Expected default and alternate values
+        current_value = openstack_utils.get_application_config_option(
+            'glance', 'debug')
+        # this is bool, not str
+        assert type(current_value) == bool
+        new_value = not current_value
+
+        # convert bool to str
+        current_value = str(current_value)
+        new_value = str(new_value)
+
+        set_default = {'debug': current_value}
+        set_alternate = {'debug': new_value}
+        default_entry = {'DEFAULT': {'debug': [current_value]}}
+        alternate_entry = {'DEFAULT': {'debug': [new_value]}}
+
+        # Config file affected by juju set config change
+        conf_file = '/etc/glance/glance-api.conf'
+
+        # Services which are expected to restart upon config change
+        services = {'glance-api': conf_file}
+        current_release = openstack_utils.get_os_release()
+        bionic_stein = openstack_utils.get_os_release('bionic_stein')
+        if current_release < bionic_stein:
+            services.update({'glance-registry': conf_file})
+
+        # Make config change, check for service restarts
+        logging.info('changing config: {}'.format(set_alternate))
+        self.restart_on_changed(
+            conf_file,
+            set_default,
+            set_alternate,
+            default_entry,
+            alternate_entry,
+            services)
+
     def test_901_pause_resume(self):
         """Run pause and resume tests.