diff --git a/.env.development b/.env.development
index 98937cf..f647dd5 100644
--- a/.env.development
+++ b/.env.development
@@ -6,6 +6,6 @@ NEXT_PUBLIC_USE_MOCK_BACKEND_LOOP_START=false
 NEXT_PUBLIC_EXPORT_STATIC=false
 NEXT_PUBLIC_USE_CGI=false
 # App-Versionsnummer
-NEXT_PUBLIC_APP_VERSION=1.6.785
+NEXT_PUBLIC_APP_VERSION=1.6.787
 NEXT_PUBLIC_CPL_MODE=json   # json (Entwicklungsumgebung) oder jsSimulatedProd (CPL ->CGI-Interface-Simulator) oder production (CPL-> CGI-Interface Platzhalter)
 
diff --git a/.env.production b/.env.production
index 1cfb2c4..e39e33a 100644
--- a/.env.production
+++ b/.env.production
@@ -5,5 +5,5 @@ NEXT_PUBLIC_CPL_API_PATH=/CPL
 NEXT_PUBLIC_EXPORT_STATIC=true
 NEXT_PUBLIC_USE_CGI=true
 # App-Versionsnummer
-NEXT_PUBLIC_APP_VERSION=1.6.785
+NEXT_PUBLIC_APP_VERSION=1.6.787
 NEXT_PUBLIC_CPL_MODE=production
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index fb9da9d..e59ad5a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+## [1.6.787] – 2025-08-31
+
+- fix: Die Konfiguration ist jetzt angepasst:
+Playwright verwendet immer einen bereits laufenden Dev-Server (reuseExistingServer: true).
+Damit gibt es keinen Port-Konflikt mehr,
+
+---
 ## [1.6.785] – 2025-08-29
 
 - fix: playwright ->npm run dev -p 3000
diff --git a/Jenkinsfile b/Jenkinsfile
index 0645b40..4ba3761 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -1,21 +1,19 @@
 pipeline {
-    agent any
-
-    environment {
-        NODE_PATH = '/var/jenkins_home/.npm/node_modules'
-        NPM_CONFIG_CACHE = '/var/jenkins_home/.npm'
+  agent any
+  tools { nodejs 'node20' }
+  stages {
+    stage('Checkout') {
+      steps { checkout scm }
     }
-
-    stages {
-        stage('Install dependencies') {
-            steps {
-                sh 'npm install --prefer-offline --no-audit'
-            }
-        }
-        stage('Run Playwright tests') {
-            steps {
-                sh 'npx playwright test'
-            }
-        }
+    stage('Install dependencies') {
+      steps { sh 'npm ci' }
     }
-}
\ No newline at end of file
+    stage('Playwright tests') {
+      steps {
+        // Installiert Browser & Systemdeps falls nötig
+        sh 'npx playwright install --with-deps'
+        sh 'npx playwright test'
+      }
+    }
+  }
+}
diff --git a/package-lock.json b/package-lock.json
index d1b4d0b..0eb1304 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "cpl-v4",
-  "version": "1.6.785",
+  "version": "1.6.787",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "cpl-v4",
-      "version": "1.6.785",
+      "version": "1.6.787",
       "dependencies": {
         "@fontsource/roboto": "^5.1.0",
         "@headlessui/react": "^2.2.4",
diff --git a/package.json b/package.json
index dafc179..4e2741a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cpl-v4",
-  "version": "1.6.785",
+  "version": "1.6.787",
   "private": true,
   "scripts": {
     "dev": "next dev",