diff --git a/psalm.xml b/psalm.xml
index 3f12f1331c272..eefa7b1dabbc2 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -17,4 +17,13 @@
             <directory name="vendor" />
         </ignoreFiles>
     </projectFiles>
+
+    <issueHandlers>
+        <UndefinedClass>
+            <errorLevel type="suppress">
+                <!-- Class has been added in PHP 8.1 -->
+                <referencedClass name="ReflectionIntersectionType"/>
+            </errorLevel>
+        </UndefinedClass>
+    </issueHandlers>
 </psalm>
diff --git a/src/Symfony/Component/PropertyInfo/Extractor/ReflectionExtractor.php b/src/Symfony/Component/PropertyInfo/Extractor/ReflectionExtractor.php
index 0af4b9bf1bb36..be22f95855b9e 100644
--- a/src/Symfony/Component/PropertyInfo/Extractor/ReflectionExtractor.php
+++ b/src/Symfony/Component/PropertyInfo/Extractor/ReflectionExtractor.php
@@ -333,8 +333,8 @@ private function extractFromReflectionType(\ReflectionType $reflectionType, \Ref
         $types = [];
         $nullable = $reflectionType->allowsNull();
 
-        foreach ($reflectionType instanceof \ReflectionUnionType ? $reflectionType->getTypes() : [$reflectionType] as $type) {
-            $phpTypeOrClass = $reflectionType instanceof \ReflectionNamedType ? $reflectionType->getName() : (string) $type;
+        foreach (($reflectionType instanceof \ReflectionUnionType || $reflectionType instanceof \ReflectionIntersectionType) ? $reflectionType->getTypes() : [$reflectionType] as $type) {
+            $phpTypeOrClass = $type->getName();
             if ('null' === $phpTypeOrClass || 'mixed' === $phpTypeOrClass || 'never' === $phpTypeOrClass) {
                 continue;
             }
diff --git a/src/Symfony/Component/PropertyInfo/Tests/Extractor/ReflectionExtractorTest.php b/src/Symfony/Component/PropertyInfo/Tests/Extractor/ReflectionExtractorTest.php
index 95e1ca5cda118..2f2449cd1112d 100644
--- a/src/Symfony/Component/PropertyInfo/Tests/Extractor/ReflectionExtractorTest.php
+++ b/src/Symfony/Component/PropertyInfo/Tests/Extractor/ReflectionExtractorTest.php
@@ -256,11 +256,20 @@ public function php80TypesProvider()
     }
 
     /**
+     * @dataProvider php81TypesProvider
      * @requires PHP 8.1
      */
-    public function testExtractPhp81Type()
+    public function testExtractPhp81Type($property, array $type = null)
     {
-        $this->assertNull($this->extractor->getTypes('Symfony\Component\PropertyInfo\Tests\Fixtures\Php81Dummy', 'nothing', []));
+        $this->assertEquals($type, $this->extractor->getTypes('Symfony\Component\PropertyInfo\Tests\Fixtures\Php81Dummy', $property, []));
+    }
+
+    public function php81TypesProvider()
+    {
+        return [
+            ['nothing', null],
+            ['collection', [new Type(Type::BUILTIN_TYPE_OBJECT, false, 'Traversable'), new Type(Type::BUILTIN_TYPE_OBJECT, false, 'Countable')]],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/PropertyInfo/Tests/Fixtures/Php81Dummy.php b/src/Symfony/Component/PropertyInfo/Tests/Fixtures/Php81Dummy.php
index b4e896a434524..1300c3e695f1f 100644
--- a/src/Symfony/Component/PropertyInfo/Tests/Fixtures/Php81Dummy.php
+++ b/src/Symfony/Component/PropertyInfo/Tests/Fixtures/Php81Dummy.php
@@ -8,4 +8,8 @@ public function getNothing(): never
     {
         throw new \Exception('Oops');
     }
+
+    public function getCollection(): \Traversable&\Countable
+    {
+    }
 }