Whoops, forgot to version-gate chardet in the actual code. Thanks Travis!

pdfminer/utils.py

@@ -8,9 +8,9 @@ import struct
 INF = (1<<31) - 1
 
 import six  #Python 2+3 compatibility
-import chardet  # For str encoding detection in Py3
 
 if six.PY3:
+    import chardet  # For str encoding detection in Py3
     unicode = str
 
 def make_compat_bytes(in_str):

tests/test_tools_dumppdf.py

@@ -8,7 +8,6 @@ if six.PY3:
     from tools import dumppdf
 elif six.PY2:
     import os, sys
-#    raise Exception("{}\n{}".format(sys.path, os.path.abspath(os.path.curdir)))
     sys.path.append(os.path.abspath(os.path.curdir))
     import tools.dumppdf as dumppdf