diff --git a/.travis.yml b/.travis.yml
index ff8a1038a..862e963b1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,6 +17,7 @@ env:
     - GOPATH=/tmp/go
     - PATH=$GOPATH/bin:$PATH
   matrix:
+    - TOXENV=py26 BOULDER_INTEGRATION=1
     - TOXENV=py27 BOULDER_INTEGRATION=1
     - TOXENV=lint
     - TOXENV=cover
diff --git a/acme/setup.py b/acme/setup.py
index 59c07d5c8..2495a42ff 100644
--- a/acme/setup.py
+++ b/acme/setup.py
@@ -59,6 +59,9 @@ setup(
         'Programming Language :: Python',
         'Programming Language :: Python :: 2',
         'Programming Language :: Python :: 2.7',
+        'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.3',
+        'Programming Language :: Python :: 3.4',
         'Topic :: Internet :: WWW/HTTP',
         'Topic :: Security',
     ],
diff --git a/letsencrypt/colored_logging.py b/letsencrypt/colored_logging.py
index 170da0b38..443364ddd 100644
--- a/letsencrypt/colored_logging.py
+++ b/letsencrypt/colored_logging.py
@@ -17,7 +17,12 @@ class StreamHandler(logging.StreamHandler):
     """
 
     def __init__(self, stream=None):
-        super(StreamHandler, self).__init__(stream)
+        if sys.version_info < (2, 7):
+            # pragma: no cover
+            # pylint: disable=non-parent-init-called
+            logging.StreamHandler.__init__(self, stream)
+        else:
+            super(StreamHandler, self).__init__(stream)
         self.colored = (sys.stderr.isatty() if stream is None else
                         stream.isatty())
         self.red_level = logging.WARNING
@@ -31,10 +36,10 @@ class StreamHandler(logging.StreamHandler):
         :rtype: str
 
         """
-        output = super(StreamHandler, self).format(record)
+        out = (logging.StreamHandler.format(self, record)
+               if sys.version_info < (2, 7)
+               else super(StreamHandler, self).format(record))
         if self.colored and record.levelno >= self.red_level:
-            return ''.join((le_util.ANSI_SGR_RED,
-                            output,
-                            le_util.ANSI_SGR_RESET))
+            return ''.join((le_util.ANSI_SGR_RED, out, le_util.ANSI_SGR_RESET))
         else:
-            return output
+            return out
diff --git a/letsencrypt/tests/crypto_util_test.py b/letsencrypt/tests/crypto_util_test.py
index f0b8c0e4d..1a9f39572 100644
--- a/letsencrypt/tests/crypto_util_test.py
+++ b/letsencrypt/tests/crypto_util_test.py
@@ -228,9 +228,8 @@ class CertLoaderTest(unittest.TestCase):
     def test_load_invalid_cert(self):
         from letsencrypt.crypto_util import pyopenssl_load_certificate
         bad_cert_data = CERT.replace("BEGIN CERTIFICATE", "ASDFASDFASDF!!!")
-
-        with self.assertRaises(errors.Error):
-            pyopenssl_load_certificate(bad_cert_data)
+        self.assertRaises(
+            errors.Error, pyopenssl_load_certificate, bad_cert_data)
 
 
 class NotBeforeTest(unittest.TestCase):
diff --git a/setup.py b/setup.py
index d4fe1eda0..40c6ac16c 100644
--- a/setup.py
+++ b/setup.py
@@ -99,6 +99,7 @@ setup(
         'Operating System :: POSIX :: Linux',
         'Programming Language :: Python',
         'Programming Language :: Python :: 2',
+        'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
         'Topic :: Internet :: WWW/HTTP',
         'Topic :: Security',
diff --git a/tox.ini b/tox.ini
index febf1a2d0..8ea3e518f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,7 +6,7 @@
 # acme and letsencrypt are not yet on pypi, so when Tox invokes
 # "install *.zip", it will not find deps
 skipsdist = true
-envlist = py27,cover,lint
+envlist = py26,py27,py33,py34,cover,lint
 
 # nosetest -v => more verbose output, allows to detect busy waiting
 # loops, especially on Travis
@@ -48,6 +48,7 @@ commands =
     ./tox.cover.sh
 
 [testenv:lint]
+# recent versions of pylint do not support Python 2.6 (#97, #187)
 basepython = python2.7
 # separating into multiple invocations disables cross package
 # duplicate code checking; if one of the commands fails, others will