Index: abp/filters/render_script.py
===================================================================
--- a/abp/filters/render_script.py
+++ b/abp/filters/render_script.py
@@ -45,7 +45,7 @@
     """Entry point for the rendering script (flrender)."""
     sources = {
         'http': WebSource('http'),
-        'https': WebSource('https')
+        'https': WebSource('https'),
     }
     args = parse_args()
 
Index: setup.py
===================================================================
--- a/setup.py
+++ b/setup.py
@@ -52,7 +52,7 @@
     packages=['abp', 'abp.filters'],
     cmdclass={'devenv': DevEnvCommand},
     entry_points={
-        'console_scripts': ['flrender=abp.filters.render_script:main']
+        'console_scripts': ['flrender=abp.filters.render_script:main'],
     },
     include_package_data=True,
     license='GPLv3',
@@ -68,5 +68,5 @@
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
-    ]
+    ],
 )
Index: tests/test_parser.py
===================================================================
--- a/tests/test_parser.py
+++ b/tests/test_parser.py
@@ -90,13 +90,13 @@
     'foo.com#?#aaa :-abp-properties(abc) bbb': {
         'selector': {
             'type': ST.XCSS,
-            'value': 'aaa :-abp-properties(abc) bbb'
+            'value': 'aaa :-abp-properties(abc) bbb',
         },
     },
     '#?#:-abp-properties(|background-image: url(data:*))': {
         'selector': {
             'type': ST.XCSS,
-            'value': ':-abp-properties(|background-image: url(data:*))'
+            'value': ':-abp-properties(|background-image: url(data:*))',
         },
         'options': [],
     },
Index: tox.ini
===================================================================
--- a/tox.ini
+++ b/tox.ini
@@ -25,6 +25,7 @@
 deps =
     flake8
     flake8-docstrings
+    flake8-commas
     pep8-naming
     hg+https://hg.adblockplus.org/codingtools#egg=flake8-eyeo&subdirectory=flake8-eyeo
 commands =