diff --git a/Build/Scripts/runTests.sh b/Build/Scripts/runTests.sh
index 7281af0..6179a57 100755
--- a/Build/Scripts/runTests.sh
+++ b/Build/Scripts/runTests.sh
@@ -323,7 +323,7 @@ CONTAINER_INTERACTIVE="-it --init"
 HOST_UID=$(id -u)
 HOST_PID=$(id -g)
 USERSET=""
-SUFFIX=$(echo $RANDOM)
+SUFFIX="$RANDOM"
 NETWORK="friendsoftypo3-tea-${SUFFIX}"
 CI_PARAMS="${CI_PARAMS:-}"
 CONTAINER_HOST="host.docker.internal"