Exclude 'tests' instead of 'test'. Sphinx-1.2.3 wheel package includes 'tests' directory. It might be happen by this wrong parameter.

setup.py

@@ -185,7 +185,7 @@ setup(
         'Topic :: Utilities',
     ],
     platforms='any',
-    packages=find_packages(exclude=['custom_fixers', 'test']),
+    packages=find_packages(exclude=['custom_fixers', 'tests']),
     include_package_data=True,
     entry_points={
         'console_scripts': [