diff --git a/.travis.yml b/.travis.yml
index c131581..06fa8a3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,6 +14,7 @@ env:
     - TOX_SUFFIX="requests26"
     - TOX_SUFFIX="requests27"
     - TOX_SUFFIX="requests213"
+    - TOX_SUFFIX="requests216"
     - TOX_SUFFIX="requests1"
     - TOX_SUFFIX="httplib2"
     - TOX_SUFFIX="boto"
diff --git a/tox.ini b/tox.ini
index 0d00deb..4b51783 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = {py26,py27,py33,py34,py35,py36,pypy,pypy3}-{flakes,requests213,requests27,requests26,requests25,requests24,requests23,requests22,requests1,httplib2,urllib317,urllib319,urllib3110,tornado3,tornado4,boto,boto3,aiohttp}
+envlist = {py26,py27,py33,py34,py35,py36,pypy,pypy3}-{flakes,requests216,requests213,requests27,requests26,requests25,requests24,requests23,requests22,requests1,httplib2,urllib317,urllib319,urllib3110,tornado3,tornado4,boto,boto3,aiohttp}
 
 [testenv:flakes]
 skipsdist = True
@@ -20,6 +20,7 @@ deps =
     pytest-httpbin
     PyYAML
     requests1: requests==1.2.3
+    requests216: requests==2.16.3
     requests213: requests==2.13.0
     requests27: requests==2.7.0
     requests26: requests==2.6.0