diff --git a/tests/instruments/altimeter/test_altimeter.py b/tests/instruments/altimeter/test_altimeter.py
index fe5a2ec2..8cdc1fa3 100644
--- a/tests/instruments/altimeter/test_altimeter.py
+++ b/tests/instruments/altimeter/test_altimeter.py
@@ -24,4 +24,6 @@ def test_altimeter(fix,qtbot):
     widget.resize(200,200)
     widget.show()
     qtbot.waitExposed(widget)
+    widget.paintEvent(None)
+
     qtbot.wait(3000)