diff --git a/.travis.yml b/.travis.yml
index 7f0c7dca..7e0e8be8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,9 +15,9 @@ matrix:
     include:
           # Minimum supported dependencies with the latest and oldest PHP version
         - php: 7.2
-          env: COMPOSER_FLAGS="--prefer-stable --prefer-lowest" SYMFONY_DEPRECATIONS_HELPER="weak_vendors"
+          env: COMPOSER_FLAGS="--prefer-stable --prefer-lowest" SYMFONY_DEPRECATIONS_HELPER="max[self]=0"
         - php: 7.0
-          env: COMPOSER_FLAGS="--prefer-stable --prefer-lowest" SYMFONY_DEPRECATIONS_HELPER="weak_vendors"
+          env: COMPOSER_FLAGS="--prefer-stable --prefer-lowest" SYMFONY_DEPRECATIONS_HELPER="max[self]=0"
 
           # Test the latest stable release
         - php: 7.0
diff --git a/composer.json b/composer.json
index b985703c..441b2818 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
     "symfony/console": "^3.3 || ^4.0"
   },
   "require-dev": {
-    "symfony/phpunit-bridge": "^3.4 || ^4.0",
+    "symfony/phpunit-bridge": "^4.3",
     "symfony/yaml": "^3.3 || ^4.0",
     "geoip/geoip": "~1.17",
     "doctrine/cache": "~1.3",
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 3303a0e6..a2164d55 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -8,7 +8,6 @@
          convertWarningsToExceptions="true"
          processIsolation="false"
          stopOnFailure="false"
-         syntaxCheck="false"
          bootstrap="Tests/bootstrap.php"
         >
     <testsuites>