diff --git a/.travis.yml b/.travis.yml
index a706b27..bc007f2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,27 +7,37 @@ python:
   - "3.4"
   - "pypy"
 
-env:
-  - TWISTED="==13.0.0"
-  - TWISTED="==15.2.0"
-
 # We have to pin Jinja2 < 2.7  for Python 3.2 because 2.7 drops/breaks support:
 # http://jinja.pocoo.org/docs/changelog/#version-2-7
-# And Spinx to < 1.3 for pypy3 and python 3.2 similarly.
+# And Sphinx to < 1.3 for pypy3 and python 3.2 similarly.
 #
 # See also:
 # http://stackoverflow.com/questions/18252804/syntax-error-in-jinja-2-library
+#
+# Twisted tests currently only work on Python 2.
 matrix:
   include:
+    - python: "2.6"
+      env:
+        - TWISTED_REQ="Twisted==13.0.0"
+        - TWISTED_REQ="Twisted==15.2.0"
+    - python: "2.7"
+      env:
+        - TWISTED_REQ="Twisted==13.0.0"
+        - TWISTED_REQ="Twisted==15.2.0"
     - python: "3.2"
       env:
         - JINJA_REQ="jinja2<2.7, Pygments<2.0"
         - SPHINX="<1.3"
+    - python: "pypy"
+      env:
+        - TWISTED_REQ="Twisted==13.0.0"
+        - TWISTED_REQ="Twisted==15.2.0"
     - python: "pypy3"
       env: SPHINX="<1.3"
 
 install:
-  - pip install fixtures $JINJA_REQ sphinx$SPHINX Twisted$TWISTED
+  - pip install fixtures $JINJA_REQ sphinx$SPHINX $TWISTED_REQ
   - python setup.py install
 
 script: