--- a/sat/test/test_plugin_xep_0334.py	Wed Jun 27 07:51:29 2018 +0200
+++ b/sat/test/test_plugin_xep_0334.py	Wed Jun 27 20:14:46 2018 +0200
@@ -27,11 +27,10 @@
 from wokkel.generic import parseXml
 from sat.core import exceptions
 
-HINTS = ('no-permanent-storage', 'no-storage', 'no-copy')
+HINTS = ("no-permanent-storage", "no-storage", "no-copy")
 
 
 class XEP_0334Test(helpers.SatTestCase):
-
     def setUp(self):
         self.host = helpers.FakeSAT()
         self.plugin = XEP_0334(self.host)
@@ -46,20 +45,23 @@
           %s
         </message>
         """
-        original_xml = template_xml % ''
+        original_xml = template_xml % ""
 
         d_list = []
 
         def cb(data, expected_xml):
-            result_xml = data['xml'].toXml().encode("utf-8")
+            result_xml = data["xml"].toXml().encode("utf-8")
             self.assertEqualXML(result_xml, expected_xml, True)
 
-        for key in (HINTS + ('', 'dummy_hint')):
-            mess_data = {'xml': parseXml(original_xml.encode("utf-8")),
-                         'extra': {key: True}
-                         }
+        for key in HINTS + ("", "dummy_hint"):
+            mess_data = {
+                "xml": parseXml(original_xml.encode("utf-8")),
+                "extra": {key: True},
+            }
             treatments = defer.Deferred()
-            self.plugin.messageSendTrigger(self.host.getClient(C.PROFILE[0]), mess_data, defer.Deferred(), treatments)
+            self.plugin.messageSendTrigger(
+                self.host.getClient(C.PROFILE[0]), mess_data, defer.Deferred(), treatments
+            )
             if treatments.callbacks:  # the trigger added a callback
                 expected_xml = template_xml % ('<%s xmlns="urn:xmpp:hints"/>' % key)
                 treatments.addCallback(cb, expected_xml)
@@ -87,16 +89,18 @@
 
         d_list = []
 
-        for key in (HINTS + ('dummy_hint',)):
+        for key in HINTS + ("dummy_hint",):
             message = parseXml(template_xml % ('<%s xmlns="urn:xmpp:hints"/>' % key))
             post_treat = defer.Deferred()
-            self.plugin.messageReceivedTrigger(self.host.getClient(C.PROFILE[0]), message, post_treat)
+            self.plugin.messageReceivedTrigger(
+                self.host.getClient(C.PROFILE[0]), message, post_treat
+            )
             if post_treat.callbacks:
-                assert(key in ('no-permanent-storage', 'no-storage'))
+                assert key in ("no-permanent-storage", "no-storage")
                 post_treat.addCallbacks(cb, eb)
                 post_treat.callback(None)
                 d_list.append(post_treat)
             else:
-                assert(key not in ('no-permanent-storage', 'no-storage'))
+                assert key not in ("no-permanent-storage", "no-storage")
 
         return defer.DeferredList(d_list)