try running dusk tests without headless flag in travis

.env.testing

@@ -0,0 +1,47 @@
+APP_NAME=local
+APP_ENV=testing
+APP_KEY=base64:t/RoN0Vj+VpQ+K7Le+5WXnErFRa0B1uIToMNltCuvK8=
+APP_DEBUG=true
+APP_URL=http://127.0.0.1:8000
+APP_LOG=daily
+
+LOG_CHANNEL=stack
+
+DB_CONNECTION=mysql
+DB_HOST=127.0.0.1
+DB_PORT=3306
+DB_DATABASE=homestead
+DB_USERNAME=homestead
+DB_PASSWORD=secret
+
+BROADCAST_DRIVER=log
+CACHE_DRIVER=file
+QUEUE_CONNECTION=sync
+SESSION_DRIVER=file
+SESSION_LIFETIME=120
+
+REDIS_HOST=127.0.0.1
+REDIS_PASSWORD=null
+REDIS_PORT=6379
+
+MAIL_DRIVER=smtp
+MAIL_HOST=mailtrap.io
+MAIL_PORT=2525
+MAIL_USERNAME=null
+MAIL_PASSWORD=null
+MAIL_ENCRYPTION=null
+
+AWS_ACCESS_KEY_ID=
+AWS_SECRET_ACCESS_KEY=
+AWS_DEFAULT_REGION=us-east-1
+AWS_BUCKET=
+
+PUSHER_APP_ID=
+PUSHER_APP_KEY=
+PUSHER_APP_SECRET=
+PUSHER_APP_CLUSTER=mt1
+
+MIX_PUSHER_APP_KEY="${PUSHER_APP_KEY}"
+MIX_PUSHER_APP_CLUSTER="${PUSHER_APP_CLUSTER}"
+
+MYSQL_DUMP_PATH=/Applications/MAMP/Library/bin/

.travis.yml

@@ -50,7 +50,7 @@ before_install:
 
 
 install: 
-    - cp .env.example .env
+    - cp .env.testing .env
     - travis_retry composer install --no-interaction --prefer-source
     - php artisan key:generate
     - php artisan dusk:update

tests/DuskTestCase.php

@@ -46,11 +46,16 @@ public static function prepare()
      */
     protected function driver()
     {
-        $options = (new ChromeOptions())->addArguments([
+        $arguments = [
             '--disable-gpu',
-            '--headless',
             '--window-size=1920,1080',
-        ]);
+        ];
+
+        if (!env('APP_ENV') !== 'testing') {
+            $arguments[] = '--headless';
+        }
+
+        $options = (new ChromeOptions())->addArguments($arguments);
 
         return RemoteWebDriver::create(
             'http://localhost:9515',