diff --git a/.travis.yml b/.travis.yml
index 31ffd3fce..b344a7538 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,24 +3,17 @@ python: "2.7"
 sudo: false
 
 env:
-  - TOX_ENV=py26-django14
-  - TOX_ENV=py26-django15
-  - TOX_ENV=py26-django16
-  - TOX_ENV=py27-django14
-  - TOX_ENV=py27-django15
-  - TOX_ENV=py27-django16
   - TOX_ENV=py27-django17
   - TOX_ENV=py27-django18
   - TOX_ENV=py27-django19
-  - TOX_ENV=py33-django15
-  - TOX_ENV=py33-django16
+  - TOX_ENV=py32-django17
+  - TOX_ENV=py32-django18
   - TOX_ENV=py33-django17
   - TOX_ENV=py33-django18
-  - TOX_ENV=py34-django15
-  - TOX_ENV=py34-django16
   - TOX_ENV=py34-django17
   - TOX_ENV=py34-django18
   - TOX_ENV=py34-django19
+  - TOX_ENV=py35-django18
   - TOX_ENV=py35-django19
   - TOX_ENV=docs
 
@@ -28,6 +21,7 @@ matrix:
   # Python 3.5 not yet available on travis, watch this to see when it is.
   fast_finish: true
   allow_failures:
+    - env: TOX_ENV=py35-django18
     - env: TOX_ENV=py35-django19
 
 install:
diff --git a/oauth2_provider/oauth2_validators.py b/oauth2_provider/oauth2_validators.py
index cc669f04f..3b42dad37 100644
--- a/oauth2_provider/oauth2_validators.py
+++ b/oauth2_provider/oauth2_validators.py
@@ -1,5 +1,6 @@
 from __future__ import unicode_literals
 
+import six
 import base64
 import binascii
 import logging
@@ -60,6 +61,11 @@ def _authenticate_basic_auth(self, request):
         except AttributeError:
             encoding = 'utf-8'
 
+        # Encode auth_string to bytes. This is needed for python3.2 compatibility
+        # because b64decode function only supports bytes type in input.
+        if isinstance(auth_string, six.string_types):
+            auth_string = auth_string.encode(encoding)
+
         try:
             b64_decoded = base64.b64decode(auth_string)
         except (TypeError, binascii.Error):
diff --git a/requirements/base.txt b/requirements/base.txt
index 1dd139d74..2a471eb19 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -1,5 +1,5 @@
 Sphinx==1.3.1
 South==1.0
 oauthlib==1.0.1
-django-braces==1.4.0
+django-braces==1.8.1
 six
diff --git a/requirements/testing.txt b/requirements/testing.txt
index 544875e36..fff8bc1f1 100644
--- a/requirements/testing.txt
+++ b/requirements/testing.txt
@@ -1,3 +1,2 @@
 -r optional.txt
-coverage
 mock==1.0.1
diff --git a/tox.ini b/tox.ini
index def45b189..305121091 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,138 +1,22 @@
 [tox]
 envlist =
-    {py26}-django{14,15,16},
-    {py27}-django{14,15,16,17,18,19},
-    {py33}-django{15,16,17,18},
-    {py34}-django{15,16,17,18,19},
-    {py35}-django{19},
+    {py27}-django{17,18,19},
+    {py32}-django{17,18}
+    {py33}-django{17,18},
+    {py34}-django{17,18,19},
+    {py35}-django{18,19},
     docs,
     flake8
 
 [testenv]
-downloadcache = {toxworkdir}/cache/
 commands=coverage run -a runtests.py
 deps =
-    -r{toxinidir}/requirements/testing.txt
-
-[testenv:py26-django14]
-basepython = python2.6
-deps =
-    Django<1.5
-    django-discover-runner
-    {[testenv]deps}
-
-[testenv:py26-django15]
-basepython = python2.6
-deps =
-    Django<1.6
-    django-discover-runner
-    {[testenv]deps}
-
-[testenv:py26-django16]
-basepython = python2.6
-deps =
-    Django<1.7
-    {[testenv]deps}
-
-[testenv:py27-django14]
-basepython = python2.7
-deps =
-    Django<1.5
-    django-discover-runner
-    {[testenv]deps}
-
-[testenv:py27-django15]
-basepython = python2.7
-deps =
-    Django<1.6
-    django-discover-runner
-    {[testenv]deps}
-
-[testenv:py27-django16]
-basepython = python2.7
-deps =
-    Django<1.7
-    {[testenv]deps}
-
-[testenv:py27-django17]
-basepython = python2.7
-deps =
-    Django<1.8
-    {[testenv]deps}
-
-[testenv:py27-django18]
-basepython = python2.7
-deps =
-    Django<1.9
-    {[testenv]deps}
-
-[testenv:py27-django19]
-basepython = python2.7
-deps =
-    git+https://github.com/django/django.git@stable/1.9.x#egg=Django
-    {[testenv]deps}
-
-[testenv:py33-django15]
-basepython = python3.3
-deps =
-    Django<1.6
-    django-discover-runner
-    {[testenv]deps}
-
-[testenv:py33-django16]
-basepython = python3.3
-deps =
-    Django<1.7
-    {[testenv]deps}
-
-[testenv:py33-django17]
-basepython = python3.3
-deps =
-    Django<1.8
-    {[testenv]deps}
-
-[testenv:py33-django18]
-basepython = python3.3
-deps =
-    Django<1.9
-    {[testenv]deps}
-
-[testenv:py34-django15]
-basepython = python3.4
-deps =
-    Django<1.6
-    django-discover-runner
-    {[testenv]deps}
-
-[testenv:py34-django16]
-basepython = python3.4
-deps =
-    Django<1.7
-    {[testenv]deps}
-
-[testenv:py34-django17]
-basepython = python3.4
-deps =
-    Django<1.8
-    {[testenv]deps}
-
-[testenv:py34-django18]
-basepython = python3.4
-deps =
-    Django<1.9
-    {[testenv]deps}
-
-[testenv:py34-django19]
-basepython = python3.4
-deps =
-    git+https://github.com/django/django.git@stable/1.9.x#egg=Django
-    {[testenv]deps}
-
-[testenv:py35-django19]
-basepython = python3.5
-deps =
-    git+https://github.com/django/django.git@stable/1.9.x#egg=Django
-    {[testenv]deps}
+    django17: Django==1.7.10
+    django18: Django==1.8.6
+    django19: https://www.djangoproject.com/download/1.9rc1/tarball/
+    py32: coverage<4
+    py{27,33,34,35}: coverage
+    -rrequirements/testing.txt
 
 [testenv:docs]
 basepython=python