diff --git a/requirements/test.txt b/requirements/test.txt
--- a/requirements/test.txt
+++ b/requirements/test.txt
@@ -22,11 +22,12 @@ markupsafe==1.0           # via jinja2
 mock==1.3.0
 palette==0.2
 pbr==3.1.1                # via mock
-pydot==1.2.3
+pydot==1.2.4
 pygments==2.2.0           # via sphinx
 pyparsing==2.2.0          # via pydot
 pytz==2017.3
 requests==2.18.4          # via sphinx
+selenium==3.8.0
 six==1.11.0               # via mock, sphinx
 snowballstemmer==1.2.1    # via sphinx
 sphinx==1.6.5