diff --git a/requirements_continuous_integration.txt b/requirements_continuous_integration.txt
index 06199e95d5dbba7bf58f40abe7e26e54c39078b2..10ec8eb3bf8f80cae3586789fa84feeb7e336d0c 100644
--- a/requirements_continuous_integration.txt
+++ b/requirements_continuous_integration.txt
@@ -16,6 +16,7 @@ pydeps>=1.7.2
 jupyter>=1.0.0
 jupyter-core>=4.5.0
 notebook>=5.7.8
+PyVirtualDisplay==1.1
 pytest-xvfb>=1.2.0
 git+https://github.com/who8mylunch/Jupyter_Canvas_Widget.git@bd151ae1509c50b5809944dd3294f58b7b069c86
 m2r>=0.2.1