diff --git a/src/test/apptask-test.js b/src/test/apptask-test.js
index 4d711daec..24f46ddb6 100644
--- a/src/test/apptask-test.js
+++ b/src/test/apptask-test.js
@@ -31,7 +31,7 @@ var MANIFEST = {
   "contactEmail": "support@cloudron.io",
   "version": "0.1.0",
   "manifestVersion": 1,
-  "dockerImage": "cloudron/test:17.0.0",
+  "dockerImage": "cloudron/test:18.0.0",
   "healthCheckPath": "/",
   "httpPort": 7777,
   "tcpPorts": {
diff --git a/src/test/checkInstall b/src/test/checkInstall
index c99ffd5c8..96b0cbf8e 100755
--- a/src/test/checkInstall
+++ b/src/test/checkInstall
@@ -3,7 +3,7 @@
 set -eu
 
 readonly SOURCE_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
-readonly TEST_IMAGE="cloudron/test:17.0.0"
+readonly TEST_IMAGE="cloudron/test:18.0.0"
 
 # reset sudo timestamp to avoid wrong success
 sudo -k || sudo --reset-timestamp