diff --git a/src/Symfony/Component/DependencyInjection/Tests/Loader/XmlFileLoaderTest.php b/src/Symfony/Component/DependencyInjection/Tests/Loader/XmlFileLoaderTest.php
index 0561c5f233..2a9ac68e97 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Loader/XmlFileLoaderTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Loader/XmlFileLoaderTest.php
@@ -635,9 +635,9 @@ class XmlFileLoaderTest extends TestCase
         $resources = $container->getResources();
 
         $fixturesDir = \dirname(__DIR__).\DIRECTORY_SEPARATOR.'Fixtures'.\DIRECTORY_SEPARATOR;
-        $this->assertContains(new FileResource($fixturesDir.'xml'.\DIRECTORY_SEPARATOR.'services_prototype.xml'), $resources);
-        $this->assertContains(new GlobResource($fixturesDir.'Prototype', '/*', true), $resources);
         $resources = array_map('strval', $resources);
+        $this->assertContains((string) (new FileResource($fixturesDir.'xml'.\DIRECTORY_SEPARATOR.'services_prototype.xml')), $resources);
+        $this->assertContains((string) (new GlobResource($fixturesDir.'Prototype', '/*', true)), $resources);
         $this->assertContains('reflection.Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\Foo', $resources);
         $this->assertContains('reflection.Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\Sub\Bar', $resources);
     }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Loader/YamlFileLoaderTest.php b/src/Symfony/Component/DependencyInjection/Tests/Loader/YamlFileLoaderTest.php
index dbd5f8ed3c..d8b329a560 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Loader/YamlFileLoaderTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Loader/YamlFileLoaderTest.php
@@ -394,9 +394,9 @@ class YamlFileLoaderTest extends TestCase
         $resources = $container->getResources();
 
         $fixturesDir = \dirname(__DIR__).\DIRECTORY_SEPARATOR.'Fixtures'.\DIRECTORY_SEPARATOR;
-        $this->assertContains(new FileResource($fixturesDir.'yaml'.\DIRECTORY_SEPARATOR.'services_prototype.yml'), $resources);
-        $this->assertContains(new GlobResource($fixturesDir.'Prototype', '', true), $resources);
         $resources = array_map('strval', $resources);
+        $this->assertContains((string) (new FileResource($fixturesDir.'yaml'.\DIRECTORY_SEPARATOR.'services_prototype.yml')), $resources);
+        $this->assertContains((string) (new GlobResource($fixturesDir.'Prototype', '', true)), $resources);
         $this->assertContains('reflection.Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\Foo', $resources);
         $this->assertContains('reflection.Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\Sub\Bar', $resources);
     }