diff --git a/.travis.yml b/.travis.yml
index 7607d306fc..30142cf1de 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,9 +4,6 @@ cache: pip
 python:
     - 2.7
     - 3.7
-matrix:
-    allow_failures:
-        - python: 3.7
 install:
     #- pip install -r requirements.txt
     - pip install flake8  # pytest  # add another testing frameworks later
diff --git a/gyp/pylib/gyp/MSVSNew.py b/gyp/pylib/gyp/MSVSNew.py
index 91fcb413a6..0ec628cc1f 100644
--- a/gyp/pylib/gyp/MSVSNew.py
+++ b/gyp/pylib/gyp/MSVSNew.py
@@ -10,6 +10,11 @@
 
 import gyp.common
 
+try:
+  cmp
+except NameError:
+  def cmp(x, y):
+    return (x > y) - (x < y)
 
 # Initialize random number generator
 random.seed()
diff --git a/gyp/pylib/gyp/simple_copy.py b/gyp/pylib/gyp/simple_copy.py
index 463929386e..94a6f17dab 100644
--- a/gyp/pylib/gyp/simple_copy.py
+++ b/gyp/pylib/gyp/simple_copy.py
@@ -28,8 +28,12 @@ def deepcopy(x):
 def _deepcopy_atomic(x):
   return x
 
-for x in (type(None), int, long, float,
-          bool, str, unicode, type):
+try:
+  types = bool, float, int, str, type, type(None), long, unicode
+except NameError:  # Python 3
+  types = bool, float, int, str, type, type(None)
+
+for x in types:
   d[x] = _deepcopy_atomic
 
 def _deepcopy_list(x):
diff --git a/gyp/pylib/gyp/xcodeproj_file.py b/gyp/pylib/gyp/xcodeproj_file.py
index 9bd582e477..b0385468c5 100644
--- a/gyp/pylib/gyp/xcodeproj_file.py
+++ b/gyp/pylib/gyp/xcodeproj_file.py
@@ -138,21 +138,18 @@
 """
 
 import gyp.common
+import hashlib
 import posixpath
 import re
 import struct
 import sys
 
-# hashlib is supplied as of Python 2.5 as the replacement interface for sha
-# and other secure hashes.  In 2.6, sha is deprecated.  Import hashlib if
-# available, avoiding a deprecation warning under 2.6.  Import sha otherwise,
-# preserving 2.4 compatibility.
 try:
-  import hashlib
-  _new_sha1 = hashlib.sha1
-except ImportError:
-  import sha
-  _new_sha1 = sha.new
+  basestring, cmp, unicode
+except NameError:  # Python 3
+  basestring = unicode = str
+  def cmp(x, y):
+    return (x > y) - (x < y)
 
 
 # See XCObject._EncodeString.  This pattern is used to determine when a string
@@ -324,8 +321,7 @@ def Copy(self):
           that._properties[key] = new_value
         else:
           that._properties[key] = value
-      elif isinstance(value, str) or isinstance(value, unicode) or \
-           isinstance(value, int):
+      elif isinstance(value, (basestring, int)):
         that._properties[key] = value
       elif isinstance(value, list):
         if is_strong:
@@ -422,7 +418,7 @@ def _HashUpdate(hash, data):
       hash.update(data)
 
     if seed_hash is None:
-      seed_hash = _new_sha1()
+      seed_hash = hashlib.sha1()
 
     hash = seed_hash.copy()
 
@@ -788,8 +784,7 @@ def UpdateProperties(self, properties, do_copy=False):
             self._properties[property] = value.Copy()
           else:
             self._properties[property] = value
-        elif isinstance(value, str) or isinstance(value, unicode) or \
-             isinstance(value, int):
+        elif isinstance(value, (basestring, int)):
           self._properties[property] = value
         elif isinstance(value, list):
           if is_strong:
diff --git a/gyp/tools/pretty_vcproj.py b/gyp/tools/pretty_vcproj.py
index da7eb254cc..e1ec7fee76 100755
--- a/gyp/tools/pretty_vcproj.py
+++ b/gyp/tools/pretty_vcproj.py
@@ -22,6 +22,12 @@
 
 __author__ = 'nsylvain (Nicolas Sylvain)'
 
+try:
+  cmp
+except NameError:
+  def cmp(x, y):
+    return (x > y) - (x < y)
+
 REPLACEMENTS = dict()
 ARGUMENTS = None
 
diff --git a/test/fixtures/test-charmap.py b/test/fixtures/test-charmap.py
index b752f0bbbf..b338f915bc 100644
--- a/test/fixtures/test-charmap.py
+++ b/test/fixtures/test-charmap.py
@@ -2,14 +2,21 @@
 import sys
 import locale
 
-reload(sys)
+try:
+  reload(sys)
+except NameError:  # Python 3
+  pass
 
 def main():
   encoding = locale.getdefaultlocale()[1]
   if not encoding:
     return False
 
-  sys.setdefaultencoding(encoding)
+  try:
+    sys.setdefaultencoding(encoding)
+  except AttributeError:  # Python 3
+    pass
+
   textmap = {
     'cp936': u'\u4e2d\u6587',
     'cp1252': u'Lat\u012Bna',