diff --git a/test-requirements.txt b/test-requirements.txt
index 77daa411..911181a4 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,4 +1,4 @@
-hacking<0.11,>=0.10.0
+hacking>=3.0.1,<3.1.0  # Apache-2.0
 pytz>=2013.6  # MIT
 PyYAML>=3.1.0  # MIT
 requests>=2.10.0  # Apache-2.0
diff --git a/tools/check_chair.py b/tools/check_chair.py
index 3b98ddbd..f6e8e230 100644
--- a/tools/check_chair.py
+++ b/tools/check_chair.py
@@ -59,12 +59,13 @@ A tool that checks a meeting chair matches the canonical format.
     meetings = meeting.load_meetings(args.yaml_dir)
     return_code = 0
     for m in meetings:
-            ok, msg = check_chair(m.chair)
-            if not ok:
-                return_code = 1
-                print(m.filefrom)
-                print(msg.rstrip())
+        ok, msg = check_chair(m.chair)
+        if not ok:
+            return_code = 1
+            print(m.filefrom)
+            print(msg.rstrip())
     return return_code
 
+
 if __name__ == '__main__':
     sys.exit(main())
diff --git a/tools/count_slot_usage.py b/tools/count_slot_usage.py
index 5bbb978a..dbc9601d 100755
--- a/tools/count_slot_usage.py
+++ b/tools/count_slot_usage.py
@@ -123,7 +123,7 @@ def calculate_meeting_counts(meetings):
                 # assumes that we don't have any meetings that are longer than
                 # 60mins)
                 if (mins + duration) > 60:
-                    meeting_counts[(hour+1) % 24][day].append(meeting_info)
+                    meeting_counts[(hour + 1) % 24][day].append(meeting_info)
     return meeting_counts