diff --git a/LCS/MessageDaemons/ObservationStartListener/test/tObservationStartListener.run b/LCS/MessageDaemons/ObservationStartListener/test/tObservationStartListener.run
index 6b1b33da4137da34b45bb38a908f05b4c06fa707..09334519b07cc898919931804a35f6276d787e56 100755
--- a/LCS/MessageDaemons/ObservationStartListener/test/tObservationStartListener.run
+++ b/LCS/MessageDaemons/ObservationStartListener/test/tObservationStartListener.run
@@ -26,7 +26,7 @@ send_msg $QUEUE "`cat tObservationStartListener.parset.correct.match.msg.xml`"
 # Msg 4: Redo Msg 3
 send_msg $QUEUE "`cat tObservationStartListener.parset.correct.match.msg.xml`"
 
-sleep 2  # wait for executed program triggered by Msg 3 & 4 to finish
+sleep 4  # wait for executed program triggered by Msg 3 & 4 to finish
 kill -s SIGTERM $pid 2>/dev/null
 wait $pid || :  # mask exit status for bash -e
 echo