diff --git a/.travis.yml b/.travis.yml
index 703b19b..09eb1ed 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,6 +8,7 @@ env:
     - WITH_LIB="requests2.2"
     - WITH_LIB="requests2.3"
     - WITH_LIB="requests2.4"
+    - WITH_LIB="requests2.5"
     - WITH_LIB="requests1.x"
     - WITH_LIB="httplib2"
     - WITH_LIB="boto"
@@ -33,6 +34,7 @@ install:
 - if [ $WITH_LIB = "requests2.2" ] ; then pip install requests==2.2.1; fi
 - if [ $WITH_LIB = "requests2.3" ] ; then pip install requests==2.3.0; fi
 - if [ $WITH_LIB = "requests2.4" ] ; then pip install requests==2.4.0; fi
+- if [ $WITH_LIB = "requests2.5" ] ; then pip install requests==2.5.0; fi
 - if [ $WITH_LIB = "httplib2" ] ; then pip install httplib2; fi
 - if [ $WITH_LIB = "boto" ] ; then pip install boto; fi
 script: python setup.py test
diff --git a/tox.ini b/tox.ini
index 66e300b..2389a92 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = {py26,py27,py33,py34,pypy}-{requests24,requests23,requests22,requests1,httplib2,urllib3,boto}
+envlist = {py26,py27,py33,py34,pypy}-{requests25,requests24,requests23,requests22,requests1,httplib2,urllib3,boto}
 
 [testenv]
 commands =
@@ -16,9 +16,10 @@ deps =
     pytest-localserver
     PyYAML
     requests1: requests==1.2.3
+    requests25: requests==2.5.0
     requests24: requests==2.4.0
     requests23: requests==2.3.0
     requests22: requests==2.2.1
     httplib2: httplib2
     urllib3: urllib3==1.7.1
-    boto: boto
\ No newline at end of file
+    boto: boto
diff --git a/vcr/patch.py b/vcr/patch.py
index 90c6c8a..7e538a9 100644
--- a/vcr/patch.py
+++ b/vcr/patch.py
@@ -237,7 +237,7 @@ class ConnectionRemover(object):
     def __exit__(self, *args):
         for pool, connections in self._connection_pool_to_connections.items():
             readd_connections = []
-            while not pool.pool.empty() and connections:
+            while pool.pool and not pool.pool.empty() and connections:
                 connection = pool.pool.get()
                 if isinstance(connection, self._connection_class):
                     connections.remove(connection)