diff --git a/plugins/Channel/plugin.py b/plugins/Channel/plugin.py
index 72ab2aa9f..3e1e46583 100644
--- a/plugins/Channel/plugin.py
+++ b/plugins/Channel/plugin.py
@@ -70,8 +70,8 @@ class Channel(callbacks.Plugin):
                                   channel, msg.prefix)
                     irc.sendMsg(networkGroup.channels.join(channel))
             else:
-                self.log.info('Kicked from %s by %s. Not auto-rejoining.' %
-                        (channel, msg.prefix))
+                self.log.info('Kicked from %s by %s. Not auto-rejoining.',
+                        channel, msg.prefix)
 
     def _sendMsg(self, irc, msg):
         irc.queueMsg(msg)
diff --git a/plugins/Dunno/plugin.py b/plugins/Dunno/plugin.py
index f67951aa2..ef96a3d54 100644
--- a/plugins/Dunno/plugin.py
+++ b/plugins/Dunno/plugin.py
@@ -49,7 +49,7 @@ class Dunno(plugins.ChannelIdDatabasePlugin):
                 dunno = dunno.text
                 prefixNick = self.registryValue('prefixNick', channel)
                 env = {'command': tokens[0]}
-                self.log.info('Issuing "dunno" answer, %s is not a command.' %
+                self.log.info('Issuing "dunno" answer, %s is not a command.',
                         tokens[0])
                 dunno = ircutils.standardSubstitute(irc, msg, dunno, env=env)
                 irc.reply(dunno, prefixNick=prefixNick)
diff --git a/plugins/Misc/plugin.py b/plugins/Misc/plugin.py
index bb85ce43d..240fce914 100644
--- a/plugins/Misc/plugin.py
+++ b/plugins/Misc/plugin.py
@@ -171,9 +171,9 @@ class Misc(callbacks.Plugin):
             if tokens:
                 # echo [] will get us an empty token set, but there's no need
                 # to log this in that case anyway, it being a nested command.
-                self.log.info('Not replying to %s in %s, not a command.' %
-                    (tokens[0], channel
-                    if channel != irc.nick else _('private')))
+                self.log.info('Not replying to %s in %s, not a command.',
+                    tokens[0], channel
+                    if channel != irc.nick else _('private'))
             if irc.nested:
                 bracketConfig = conf.supybot.commands.nested.brackets
                 brackets = conf.get(bracketConfig, channel)
diff --git a/plugins/RSS/plugin.py b/plugins/RSS/plugin.py
index 938910bb5..f1a7bbc2a 100644
--- a/plugins/RSS/plugin.py
+++ b/plugins/RSS/plugin.py
@@ -324,7 +324,7 @@ class RSS(callbacks.Plugin):
         for name in announced_feeds:
             feed = self.get_feed(name)
             if not feed:
-                self.log.warning('Feed %s is announced but does not exist.' %
+                self.log.warning('Feed %s is announced but does not exist.',
                         name)
                 continue
             self.update_feed_if_needed(feed)
diff --git a/plugins/Scheduler/plugin.py b/plugins/Scheduler/plugin.py
index 701cc60a2..19c929ab1 100644
--- a/plugins/Scheduler/plugin.py
+++ b/plugins/Scheduler/plugin.py
@@ -87,7 +87,7 @@ class Scheduler(callbacks.Plugin):
             except AssertionError as e:
                 if str(e) == 'An event with the same name has already been scheduled.':
                     # we must be reloading the plugin, event is still scheduled
-                    self.log.info('Event %s already exists, adding to dict.' % (name,))
+                    self.log.info('Event %s already exists, adding to dict.', name)
                     self.events[name] = event
                 else:
                     raise