diff --git a/tests/run-tests.sh b/tests/run-tests.sh
index 334cfc2..80db2f8 100755
--- a/tests/run-tests.sh
+++ b/tests/run-tests.sh
@@ -40,7 +40,7 @@ do
             && (cd /warcprox && git diff HEAD) | patch -p1 \
             && virtualenv -p $python /tmp/venv \
             && source /tmp/venv/bin/activate \
-            && pip --log-file /tmp/pip.log install . pytest requests warcio \
+            && pip --log-file /tmp/pip.log install . pytest mock requests warcio \
             && py.test -v tests \
             && py.test -v --rethinkdb-servers=localhost tests \
             && py.test -v --rethinkdb-servers=localhost --rethinkdb-big-table tests"