diff --git a/.travis.yml b/.travis.yml
index 4e9f813..c30cd41 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,5 @@
 # Config file for automatic testing at travis-ci.org
-
+sudo: false
 language: python
 
 python:
@@ -9,10 +9,12 @@ python:
   - "3.3"
   - "3.4"
   - "3.5"
-  - "3.6"
+  - "3.6.0"
+  - "3.6.1"
 
 # command to install dependencies, e.g. pip install -r requirements.txt --use-mirrors
 install: pip install -r requirements.txt
 
 # command to run tests, e.g. python setup.py test
 script: python setup.py test
+cache: pip
diff --git a/tests/common.py b/tests/common.py
index f930308..fd0a329 100644
--- a/tests/common.py
+++ b/tests/common.py
@@ -293,6 +293,9 @@ def test_joined_str(self):
         self.check_roundtrip('f"{key}={value!s}"')
         self.check_roundtrip('f"{key}={value!r}"')
         self.check_roundtrip('f"{key}={value!a}"')
+
+    @unittest.skipIf(sys.version_info != (3, 6, 0), "Only supported on 3.6.0")
+    def test_joined_str_361(self):
         self.check_roundtrip('f"{key:4}={value!s}"')
         self.check_roundtrip('f"{key:02}={value!r}"')
         self.check_roundtrip('f"{key:6}={value!a}"')