diff --git a/src/Functional/BaseTestCase.php b/src/Functional/BaseTestCase.php
index 6e61652..3097d44 100644
--- a/src/Functional/BaseTestCase.php
+++ b/src/Functional/BaseTestCase.php
@@ -178,10 +178,10 @@ protected static function assertResponseSuccess(Response $response)
     {
         libxml_use_internal_errors(true);
 
-        $dom = new \DomDocument();
+        $dom = new \DOMDocument();
         $dom->loadHTML($response->getContent());
 
-        $xpath = new \DOMXpath($dom);
+        $xpath = new \DOMXPath($dom);
         $result = $xpath->query('//div[contains(@class,"text-exception")]/h1');
         $exception = null;
         if ($result->length) {
diff --git a/src/Unit/Constraint/SchemaAcceptsXml.php b/src/Unit/Constraint/SchemaAcceptsXml.php
index 46c1e82..d3913ae 100644
--- a/src/Unit/Constraint/SchemaAcceptsXml.php
+++ b/src/Unit/Constraint/SchemaAcceptsXml.php
@@ -35,7 +35,7 @@ public function matches($schemaFile): bool
                 throw new \InvalidArgumentException(sprintf('Can only test a file if it contains 1 <config> element, %d given', $configElement->length));
             }
 
-            $configDom = new \DomDocument();
+            $configDom = new \DOMDocument();
             $configDom->appendChild($configDom->importNode($configElement->item(0), true));
 
             libxml_use_internal_errors(true);
diff --git a/tests/Functional/BaseTestCaseTest.php b/tests/Functional/BaseTestCaseTest.php
index e063e02..e9c293e 100644
--- a/tests/Functional/BaseTestCaseTest.php
+++ b/tests/Functional/BaseTestCaseTest.php
@@ -122,6 +122,7 @@ public function provideTestDb()
 
     /**
      * @dataProvider provideTestDb
+     *
      * @depends testGetContainer
      */
     public function testDb($dbName, $expected)
diff --git a/tests/Unit/Constraint/SchemaAcceptsXmlTest.php b/tests/Unit/Constraint/SchemaAcceptsXmlTest.php
index 29e8801..898de98 100644
--- a/tests/Unit/Constraint/SchemaAcceptsXmlTest.php
+++ b/tests/Unit/Constraint/SchemaAcceptsXmlTest.php
@@ -53,11 +53,11 @@ public function getAssertingData()
 
         $data = [];
 
-        $dom1 = new \DomDocument();
+        $dom1 = new \DOMDocument();
         $dom1->loadXML('<container><config xmlns="http://cmf.symfony.com/schema/dic/foo" required="f"/></container>');
         $data[] = [[$dom1], $schema1, true];
 
-        $dom2 = new \DomDocument();
+        $dom2 = new \DOMDocument();
         $dom2->loadXML('<container><config xmlns="http://cmf.symfony.com/schema/dic/foo" /></container>');
         $data[] = [[$dom2], $schema1, false];
 
@@ -70,7 +70,7 @@ public function getAssertingData()
 
     public function testFailsIfNoConfigElementIsAvailable()
     {
-        $dom = new \DomDocument();
+        $dom = new \DOMDocument();
         $dom->loadXML('<container></container>');
 
         $constraint = new SchemaAcceptsXml([$dom]);
diff --git a/tests/Unit/XmlSchemaTestCaseTest.php b/tests/Unit/XmlSchemaTestCaseTest.php
index e70678e..d02ea45 100644
--- a/tests/Unit/XmlSchemaTestCaseTest.php
+++ b/tests/Unit/XmlSchemaTestCaseTest.php
@@ -17,14 +17,14 @@ class XmlSchemaTestCaseTest extends XmlSchemaTestCase
 {
     public function testAcceptsSingleDomsWithoutArray()
     {
-        $dom = new \DomDocument();
+        $dom = new \DOMDocument();
         $dom->loadXML('<container><config xmlns="http://cmf.symfony.com/schema/dic/foo" required="f"/></container>');
         $this->assertSchemaAcceptsXml($dom, __DIR__.'/../Fixtures/schema/schema1.xsd');
     }
 
     public function testNegativeAssertion()
     {
-        $dom = new \DomDocument();
+        $dom = new \DOMDocument();
         $dom->loadXML('<container><config xmlns="http://cmf.symfony.com/schema/dic/foo" /></container>');
 
         $this->assertSchemaRefusesXml($dom, __DIR__.'/../Fixtures/schema/schema1.xsd');