diff --git a/.travis.yml b/.travis.yml
index bf433e1..2f0cf88 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -32,14 +32,15 @@ matrix:
     - env: TOX_SUFFIX="boto"
     - env: TOX_SUFFIX="boto3"
   exclude:
-    - env: TOX_SUFFIX="flakes"
-      python: 2.7
+    # Only run flakes on a single Python 2.x and a single 3.x
     - env: TOX_SUFFIX="flakes"
       python: 3.4
     - env: TOX_SUFFIX="flakes"
       python: 3.5
     - env: TOX_SUFFIX="flakes"
       python: pypy
+    - env: TOX_SUFFIX="flakes"
+      python: "pypy3.5-5.9.0"
     - env: TOX_SUFFIX="boto"
       python: 3.6
     - env: TOX_SUFFIX="requests1"