diff --git a/ribasim_qgis/scripts/run_qgis_tests.py b/ribasim_qgis/scripts/run_qgis_tests.py
index 4257dbd2b..1153b928e 100644
--- a/ribasim_qgis/scripts/run_qgis_tests.py
+++ b/ribasim_qgis/scripts/run_qgis_tests.py
@@ -14,6 +14,7 @@
     stdout=subprocess.PIPE,
     stderr=subprocess.STDOUT,
     text=True,
+    env={"DISPLAY": "0"},
 )
 
 print(qgis_process.stdout)