diff --git a/src/Symfony/Component/DomCrawler/Test/Constraint/CrawlerSelectorAttributeValueSame.php b/src/Symfony/Component/DomCrawler/Test/Constraint/CrawlerSelectorAttributeValueSame.php
index 7008779e14203..a198784d448df 100644
--- a/src/Symfony/Component/DomCrawler/Test/Constraint/CrawlerSelectorAttributeValueSame.php
+++ b/src/Symfony/Component/DomCrawler/Test/Constraint/CrawlerSelectorAttributeValueSame.php
@@ -47,7 +47,7 @@ protected function matches($crawler): bool
return false;
}
- return $this->expectedText === trim($crawler->attr($this->attribute));
+ return $this->expectedText === trim($crawler->attr($this->attribute) ?? '');
}
/**
diff --git a/src/Symfony/Component/DomCrawler/Tests/Test/Constraint/CrawlerSelectorAttributeValueSameTest.php b/src/Symfony/Component/DomCrawler/Tests/Test/Constraint/CrawlerSelectorAttributeValueSameTest.php
index ab528ab356443..47ecdc8a04438 100644
--- a/src/Symfony/Component/DomCrawler/Tests/Test/Constraint/CrawlerSelectorAttributeValueSameTest.php
+++ b/src/Symfony/Component/DomCrawler/Tests/Test/Constraint/CrawlerSelectorAttributeValueSameTest.php
@@ -23,6 +23,7 @@ public function testConstraint()
{
$constraint = new CrawlerSelectorAttributeValueSame('input[name="username"]', 'value', 'Fabien');
$this->assertTrue($constraint->evaluate(new Crawler('