diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 7c437c5075..4904e42d39 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -258,7 +258,7 @@ jobs:
     - name: Run Playwright tests
       id: playwright-run
       continue-on-error: true
-      run: npx playwright test --workers 6
+      run: ./script/run-playwright
     - id: auto-commit
       uses: stefanzweifel/git-auto-commit-action@v5
       with:
diff --git a/Procfile b/Procfile
index 50265a63ec..a23064be9c 100644
--- a/Procfile
+++ b/Procfile
@@ -1,3 +1,3 @@
-vite: cd demo; bin/vite dev
-css: cd demo; npm run build:css -- --watch
+vite: cd demo; script/start-vite
+css: cd demo; script/start-css
 web: cd demo; bin/rails s -p 4000
diff --git a/demo/script/start-css b/demo/script/start-css
new file mode 100755
index 0000000000..c4db313b6a
--- /dev/null
+++ b/demo/script/start-css
@@ -0,0 +1,4 @@
+#! /bin/bash
+
+echo $$ > tmp/pids/css.pid
+exec npm run build:css -- --watch
diff --git a/demo/script/start-vite b/demo/script/start-vite
new file mode 100755
index 0000000000..0c2772a96c
--- /dev/null
+++ b/demo/script/start-vite
@@ -0,0 +1,4 @@
+#! /bin/bash
+
+echo $$ > tmp/pids/vite.pid
+exec bin/vite dev
diff --git a/playwright.config.ts b/playwright.config.ts
index f187f55fe8..bd56e88eeb 100644
--- a/playwright.config.ts
+++ b/playwright.config.ts
@@ -23,15 +23,15 @@ const config: PlaywrightTestConfig = {
     baseURL: 'http://127.0.0.1:4000',
     browserName: 'chromium',
     headless: true,
-    screenshot: 'only-on-failure'
+    screenshot: 'only-on-failure',
   },
   expect: {
     toHaveScreenshot: {
-      animations: 'disabled'
+      animations: 'disabled',
     },
     toMatchSnapshot: {
-      threshold: 0.1
-    }
+      threshold: 0.1,
+    },
   },
   /* Retry on CI only */
   retries: process.env.CI ? 2 : 0,
@@ -39,13 +39,13 @@ const config: PlaywrightTestConfig = {
   reporter: [
     ['line'],
     ['html', {open: 'never', outputFolder: path.join(__dirname, '.playwright/report')}],
-    ['json', {outputFile: path.join(__dirname, '.playwright', 'results.json')}]
+    ['json', {outputFile: path.join(__dirname, '.playwright', 'results.json')}],
   ],
 
   webServer: {
-    command: 'overmind start',
-    port: 4000
-  }
+    command: 'script/dev',
+    port: 4000,
+  },
 }
 
 export default config
diff --git a/script/dev b/script/dev
index c3f85063ef..1114755fbc 100755
--- a/script/dev
+++ b/script/dev
@@ -18,6 +18,8 @@ bundle check || bundle install
 npm install --ignore-scripts
 popd
 
+./script/stop-existing-processes
+
 while [[ "$#" > 0 ]]; do case $1 in
   -d|--debug) debug="1"; shift;;
 esac; done
diff --git a/script/run-playwright b/script/run-playwright
new file mode 100755
index 0000000000..3c0e2d04c9
--- /dev/null
+++ b/script/run-playwright
@@ -0,0 +1,4 @@
+#! /bin/bash
+
+./script/stop-existing-processes
+exec npx playwright test --workers 6
diff --git a/script/stop-existing-processes b/script/stop-existing-processes
new file mode 100755
index 0000000000..7ac8b5472a
--- /dev/null
+++ b/script/stop-existing-processes
@@ -0,0 +1,17 @@
+#! /bin/bash
+
+overmind stop
+rm .overmind.sock
+
+pidfiles=(demo/tmp/pids/css.pid demo/tmp/pids/vite.pid demo/tmp/pids/server.pid)
+
+for pidfile in "${pidfiles[@]}"
+do
+  if [ -f $pidfile ]; then
+    pid=$(cat $pidfile)
+    name=$(basename "$pidfile" .pid)
+    echo "Stopping existing $name process with pid $pid"
+    kill -9 $pid
+    rm $pidfile
+  fi
+done