diff --git a/contrib_bots/lib/xkcd.py b/contrib_bots/lib/xkcd.py
index c3286a0..6bb90a9 100644
--- a/contrib_bots/lib/xkcd.py
+++ b/contrib_bots/lib/xkcd.py
@@ -87,7 +87,7 @@ def get_xkcd_bot_response(message):
     except XkcdNotFoundError:
         logging.exception('XKCD server responded 404 when trying to fetch comic with id %s'
                           % (command))
-        return 'Sorry, there is likely no xkcd comic strip with id: #%s' % (command)
+        return 'Sorry, there is likely no xkcd comic strip with id: #%s' % (command,)
     else:
         return ("#%s: **%s**\n[%s](%s)" % (fetched['num'],
                                            fetched['title'],
diff --git a/integrations/google/google-calendar b/integrations/google/google-calendar
index 014b7e4..47b541e 100755
--- a/integrations/google/google-calendar
+++ b/integrations/google/google-calendar
@@ -143,7 +143,7 @@ def send_reminders():
             key = (id, start)
             if key not in sent:
                 if start.hour == 0 and start.minute == 0:
-                    line = '%s is today.' % (summary)
+                    line = '%s is today.' % (summary,)
                 else:
                     line = '%s starts at %s' % (summary, start.strftime('%H:%M'))
                 print('Sending reminder:', line)