diff --git a/.gitignore b/.gitignore
index 7883b5f..37c4382 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@ composer.phar
 vendor/*
 .idea/*
 /phpunit.xml
+var/cache/*
\ No newline at end of file
diff --git a/.travis.yml b/.travis.yml
index dfd9973..1c47159 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,13 +1,13 @@
 language: php
 
 php:
-  - 7.0
-  - 7.1
   - 7.2
+  - 7.3
+  - 7.4
 
 matrix:
   include:
-    - php: 7.0
+    - php: 7.2
       env: dependencies=lowest
 
 before_script:
diff --git a/composer.json b/composer.json
index 8a05788..21343d1 100644
--- a/composer.json
+++ b/composer.json
@@ -15,17 +15,17 @@
         }
     },
     "require": {
-        "php": "~7.0",
+        "php": "~7.2",
         "php-di/php-di": "~6.0",
-        "symfony/dependency-injection": "~3.3||~4.0",
-        "symfony/http-kernel": "~3.3||~4.0",
-        "symfony/proxy-manager-bridge": "~3.3||~4.0",
-        "symfony/config": "~3.3||~4.0"
+        "symfony/dependency-injection": "~3.4||~4.4||~5.1",
+        "symfony/http-kernel": "~3.4||~4.4||~5.1",
+        "symfony/proxy-manager-bridge": "~3.4||~4.4||~5.1",
+        "symfony/config": "~3.4||~4.4||~5.1"
     },
     "require-dev": {
         "phpunit/phpunit": "^4.8",
-        "symfony/filesystem": "^3.0",
-        "symfony/yaml": "^3.0",
-        "symfony/debug": "^3.0"
+        "symfony/filesystem": "~3.4||~4.4||~5.1",
+        "symfony/yaml": "~3.4||~4.4||~5.1",
+        "symfony/error-handler": "~3.4||~4.4||~5.1"
     }
 }
diff --git a/src/Kernel.php b/src/Kernel.php
index 701f5eb..a482b28 100644
--- a/src/Kernel.php
+++ b/src/Kernel.php
@@ -10,9 +10,10 @@
 namespace DI\Bridge\Symfony;
 
 use Psr\Container\ContainerInterface;
-use Symfony\Component\Debug\DebugClassLoader;
+use Symfony\Component\Debug\DebugClassLoader as LegacyDebugClassLoader;
 use Symfony\Component\DependencyInjection\Compiler\CheckExceptionOnInvalidReferenceBehaviorPass;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\ErrorHandler\DebugClassLoader;
 
 /**
  * Customization of Symfony's kernel to setup PHP-DI.
@@ -78,25 +79,35 @@ protected function initializeContainer()
     private function removeInvalidReferenceBehaviorPass(ContainerBuilder $container)
     {
         $passConfig = $container->getCompilerPassConfig();
-        $compilationPasses = $passConfig->getRemovingPasses();
 
-        foreach ($compilationPasses as $i => $pass) {
-            if ($pass instanceof CheckExceptionOnInvalidReferenceBehaviorPass) {
-                unset($compilationPasses[$i]);
-                break;
+        $compilationPassRemover = static function (array $compilationPasses): array {
+            foreach ($compilationPasses as $i => $pass) {
+                if ($pass instanceof CheckExceptionOnInvalidReferenceBehaviorPass) {
+                    unset($compilationPasses[$i]);
+                    break;
+                }
             }
-        }
 
-        $passConfig->setRemovingPasses($compilationPasses);
+            return $compilationPasses;
+        };
+
+        $passConfig->setRemovingPasses($compilationPassRemover($passConfig->getRemovingPasses()));
+        $passConfig->setAfterRemovingPasses($compilationPassRemover($passConfig->getAfterRemovingPasses()));
     }
 
     private function disableDebugClassLoader()
     {
-        if (!class_exists(DebugClassLoader::class)) {
+        if (class_exists(DebugClassLoader::class)) {
+            DebugClassLoader::disable();
+
+            return;
+        }
+
+        if (!class_exists(LegacyDebugClassLoader::class)) {
             return;
         }
 
-        DebugClassLoader::disable();
+        LegacyDebugClassLoader::disable();
     }
 
     /**
diff --git a/tests/FunctionalTest/ContainerAwareTest.php b/tests/FunctionalTest/ContainerAwareTest.php
index d2163ac..bfcfba0 100644
--- a/tests/FunctionalTest/ContainerAwareTest.php
+++ b/tests/FunctionalTest/ContainerAwareTest.php
@@ -14,7 +14,7 @@
 /**
  * @coversNothing
  */
-class ContainerAwareInterfaceTest extends AbstractFunctionalTest
+class ContainerAwareTest extends AbstractFunctionalTest
 {
     /**
      * @link https://github.com/PHP-DI/Symfony-Bridge/issues/2
diff --git a/tests/FunctionalTest/Fixtures/config/class1.yml b/tests/FunctionalTest/Fixtures/config/class1.yml
index 11d0c80..83fc34a 100644
--- a/tests/FunctionalTest/Fixtures/config/class1.yml
+++ b/tests/FunctionalTest/Fixtures/config/class1.yml
@@ -2,4 +2,4 @@ services:
     class1:
         class: DI\Bridge\Symfony\Test\FunctionalTest\Fixtures\Class1
         public: true
-        arguments: [ '@DI\\Bridge\\Symfony\\Test\\FunctionalTest\\Fixtures\\Class2' ]
+        arguments: [ '@DI\Bridge\Symfony\Test\FunctionalTest\Fixtures\Class2' ]