diff --git a/.drone.yml b/.drone.yml
index 97e1315..7e53eb1 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -27,6 +27,7 @@ steps:
 - name: unit tests
   image: ci:latest
   pull: if-not-exists
+  environment: DISPLAY
   commands:
     - env
     - echo ${PATH}