PEP8

tests/test_references.py

@@ -1,7 +1,9 b''
 import os
 import io
 import nose.tools as nt
-from nbconvert import *
+from nbconvert import (
+    ConverterLaTeX, ConverterMarkdown, ConverterPy, ConverterHTML
+)
 from nose.tools import nottest
 
 
@@ -29,18 +31,18 b' def test_evens():'
         for conv,ext in converters:
             yield test_conversion, conv,root+'.ipynb',root+'.'+ext
 
+
 @nottest
 def compfiles(stra, strb):
-    nt.assert_equal(map(unicode.strip,stra.split('\n')),map(unicode.strip,strb.split('\n')))
+    nt.assert_equal(map(unicode.strip, stra.split('\n')),
+                    map(unicode.strip, strb.split('\n')))
+
 
 @nottest
 def test_conversion(ConverterClass, ipynb, ref_file):
-
     converter = ConverterClass(ipynb)
     converter.read()
     cv =converter.convert()
     with io.open(ref_file) as ref:
         value = ref.read()
         compfiles(cv,value)
-    
-

tests/test_simple.py

@@ -53,7 +53,8 b' def test_render_heading():'
         # Render to rst
         c = ConverterRST('')
         rst_list = c.render_heading(cell_nb)
-        nt.assert_true(isinstance(rst_list, list))  # render should return a list
+        # render should return a list
+        nt.assert_true(isinstance(rst_list, list))
         rst_str = "".join(rst_list)
         # Confirm rst content
         chk_str = "Test for heading type H{0}\n{1}\n".format(