diff --git a/runTests b/runTests
index 0eaafbc24..9c553494e 100755
--- a/runTests
+++ b/runTests
@@ -37,7 +37,7 @@ openssl req -x509 -newkey rsa:2048 -keyout platformdata/nginx/cert/host.key -out
 # clear out any containers if FAST is unset
 if [[ -z ${FAST+x} ]]; then
     echo "=> Delete all docker containers first"
-    docker ps -qa --filter \'label=isCloudronManaged\' | xargs --no-run-if-empty docker rm -f
+    docker ps -qa --filter "label=isCloudronManaged" | xargs --no-run-if-empty docker rm -f
     docker rm -f mysql-server
     echo "==> To skip this run with: FAST=1 ./runTests"
 else