diff --git a/.travis.yml b/.travis.yml
index 7651c98..7484677 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,5 +10,5 @@ before_script:
 
 # command to run our tests
 script:
-  - flake8 ./ --statistics --show-source --ignore=E501,E722 --exclude=croniter.py,relativedelta.py,*/dropbox/* # check python structure against flake8 tests, ignore long lines
+  - flake8 ./ --statistics --show-source --builtins=sys --ignore=E501,E722 --exclude=croniter.py,relativedelta.py,*/dropbox/* # check python structure against flake8 tests, ignore long lines
   - kodi-addon-checker --branch=matrix --allow-folder-id-mismatch
\ No newline at end of file
diff --git a/resources/lib/advanced_editor.py b/resources/lib/advanced_editor.py
index 23a0885..31acc7a 100644
--- a/resources/lib/advanced_editor.py
+++ b/resources/lib/advanced_editor.py
@@ -181,14 +181,14 @@ class AdvancedBackupEditor:
         while(exitCondition != -1):
             # load the custom paths
             listItem = xbmcgui.ListItem(utils.getString(30126), '')
-            listItem.setArt({'icon': os.path.join(utils.addon_dir(),'resources','images','plus-icon.png')})
+            listItem.setArt({'icon': os.path.join(utils.addon_dir(), 'resources', 'images', 'plus-icon.png')})
             options = [listItem]
 
             for index in range(0, len(customPaths.getSets())):
                 aSet = customPaths.getSet(index)
 
                 listItem = xbmcgui.ListItem(aSet['name'], utils.getString(30121) + ': ' + aSet['set']['root'])
-                listItem.setArt({'icon': os.path.join(utils.addon_dir(),'resources','images','folder-icon.png')})
+                listItem.setArt({'icon': os.path.join(utils.addon_dir(), 'resources', 'images', 'folder-icon.png')})
                 options.append(listItem)
 
             # show the gui
@@ -227,7 +227,7 @@ class AdvancedBackupEditor:
         shouldContinue = self.dialog.yesno(utils.getString(30139), utils.getString(30140), utils.getString(30141))
 
         if(shouldContinue):
-            source = xbmc.translatePath(os.path.join(utils.addon_dir(),'resources','data','default_files.json'))
-            dest = xbmc.translatePath(os.path.join(utils.data_dir(),'custom_paths.json'))
+            source = xbmc.translatePath(os.path.join(utils.addon_dir(), 'resources', 'data', 'default_files.json'))
+            dest = xbmc.translatePath(os.path.join(utils.data_dir(), 'custom_paths.json'))
 
             xbmcvfs.copy(source, dest)
diff --git a/resources/lib/backup.py b/resources/lib/backup.py
index a8b9f46..58b5761 100644
--- a/resources/lib/backup.py
+++ b/resources/lib/backup.py
@@ -522,7 +522,7 @@ class XbmcBackup:
         return result
 
     def _createResumeBackupFile(self):
-        with xbmcvfs.File(xbmc.translatePath(utils.data_dir() + "resume.txt"), 'w') as f: 
+        with xbmcvfs.File(xbmc.translatePath(utils.data_dir() + "resume.txt"), 'w') as f:
             f.write(self.restore_point)
 
     def _readBackupConfig(self, aFile):