diff --git a/requirements_dev.txt b/requirements_dev.txt
index cb11e71ae9f86dc4021665dc37172e1d66fda20b..67b2a0e632283c89d07d778f935f0328559ffb8a 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -11,6 +11,7 @@ benchmarker==4.0.1
 
 pytest==3.8.2
 pytest-runner==4.2
+pytest-xvfb==1.2.0
 sphinx-rtd-theme==0.4.3
 
 numpy==1.16.2