diff --git a/src/Symfony/Component/PropertyInfo/Tests/Extractor/PhpStanExtractorTest.php b/src/Symfony/Component/PropertyInfo/Tests/Extractor/PhpStanExtractorTest.php
index 8b52433a54fe2..5c1bdaad7e2a1 100644
--- a/src/Symfony/Component/PropertyInfo/Tests/Extractor/PhpStanExtractorTest.php
+++ b/src/Symfony/Component/PropertyInfo/Tests/Extractor/PhpStanExtractorTest.php
@@ -355,7 +355,7 @@ public function constructorTypesProvider()
     /**
      * @dataProvider unionTypesProvider
      */
-    public function testExtractorUnionTypes(string $property, array $types)
+    public function testExtractorUnionTypes(string $property, ?array $types)
     {
         $this->assertEquals($types, $this->extractor->getTypes('Symfony\Component\PropertyInfo\Tests\Fixtures\DummyUnionType', $property));
     }
@@ -368,6 +368,8 @@ public function unionTypesProvider(): array
             ['c', [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, [], [new Type(Type::BUILTIN_TYPE_STRING), new Type(Type::BUILTIN_TYPE_INT)])]],
             ['d', [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, [new Type(Type::BUILTIN_TYPE_STRING), new Type(Type::BUILTIN_TYPE_INT)], [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, [], [new Type(Type::BUILTIN_TYPE_STRING)])])]],
             ['e', [new Type(Type::BUILTIN_TYPE_OBJECT, true, Dummy::class, true, [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, [], [new Type(Type::BUILTIN_TYPE_STRING)])], [new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, [new Type(Type::BUILTIN_TYPE_INT)], [new Type(Type::BUILTIN_TYPE_STRING, false, null, true, [], [new Type(Type::BUILTIN_TYPE_OBJECT, false, DefaultValue::class)])])]), new Type(Type::BUILTIN_TYPE_OBJECT, false, ParentDummy::class)]],
+            ['f', null],
+            ['g', [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, [], [new Type(Type::BUILTIN_TYPE_STRING), new Type(Type::BUILTIN_TYPE_INT)])]],
         ];
     }
 }
diff --git a/src/Symfony/Component/PropertyInfo/Tests/Fixtures/DummyUnionType.php b/src/Symfony/Component/PropertyInfo/Tests/Fixtures/DummyUnionType.php
index 60af596bad3b3..86ddb8a1650eb 100644
--- a/src/Symfony/Component/PropertyInfo/Tests/Fixtures/DummyUnionType.php
+++ b/src/Symfony/Component/PropertyInfo/Tests/Fixtures/DummyUnionType.php
@@ -16,6 +16,9 @@
  */
 class DummyUnionType
 {
+    private const TYPE_A = 'a';
+    private const TYPE_B = 'b';
+
     /**
      * @var string|int
      */
@@ -40,4 +43,14 @@ class DummyUnionType
      * @var (Dummy<array<mixed, string>, (int | (string<DefaultValue>)[])> | ParentDummy | null)
      */
     public $e;
+
+    /**
+     * @var self::TYPE_*|null
+     */
+    public $f;
+
+    /**
+     * @var non-empty-array<string|int>
+     */
+    public $g;
 }
diff --git a/src/Symfony/Component/PropertyInfo/Util/PhpStanTypeHelper.php b/src/Symfony/Component/PropertyInfo/Util/PhpStanTypeHelper.php
index b5ed7bb5732ee..f3812ea0f35f4 100644
--- a/src/Symfony/Component/PropertyInfo/Util/PhpStanTypeHelper.php
+++ b/src/Symfony/Component/PropertyInfo/Util/PhpStanTypeHelper.php
@@ -19,6 +19,7 @@
 use PHPStan\PhpDocParser\Ast\Type\ArrayTypeNode;
 use PHPStan\PhpDocParser\Ast\Type\CallableTypeNode;
 use PHPStan\PhpDocParser\Ast\Type\CallableTypeParameterNode;
+use PHPStan\PhpDocParser\Ast\Type\ConstTypeNode;
 use PHPStan\PhpDocParser\Ast\Type\GenericTypeNode;
 use PHPStan\PhpDocParser\Ast\Type\IdentifierTypeNode;
 use PHPStan\PhpDocParser\Ast\Type\NullableTypeNode;
@@ -102,6 +103,10 @@ private function extractTypes(TypeNode $node, NameScope $nameScope): array
         if ($node instanceof UnionTypeNode) {
             $types = [];
             foreach ($node->types as $type) {
+                if ($type instanceof ConstTypeNode) {
+                    // It's safer to fall back to other extractors here, as resolving const types correctly is not easy at the moment
+                    return [];
+                }
                 foreach ($this->extractTypes($type, $nameScope) as $subType) {
                     $types[] = $subType;
                 }
@@ -160,7 +165,10 @@ private function extractTypes(TypeNode $node, NameScope $nameScope): array
                 case 'integer':
                     return [new Type(Type::BUILTIN_TYPE_INT)];
                 case 'list':
+                case 'non-empty-list':
                     return [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT))];
+                case 'non-empty-array':
+                    return [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true)];
                 case 'mixed':
                     return []; // mixed seems to be ignored in all other extractors
                 case 'parent':
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/ObjectNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/ObjectNormalizerTest.php
index 5870a657a5abb..fa9483ccf6397 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/ObjectNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/ObjectNormalizerTest.php
@@ -12,8 +12,10 @@
 namespace Symfony\Component\Serializer\Tests\Normalizer;
 
 use Doctrine\Common\Annotations\AnnotationReader;
+use PHPStan\PhpDocParser\Parser\PhpDocParser;
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\PropertyInfo\Extractor\PhpDocExtractor;
+use Symfony\Component\PropertyInfo\Extractor\PhpStanExtractor;
 use Symfony\Component\PropertyInfo\Extractor\ReflectionExtractor;
 use Symfony\Component\PropertyInfo\PropertyInfoExtractor;
 use Symfony\Component\Serializer\Exception\LogicException;
@@ -721,6 +723,22 @@ public function testAcceptJsonNumber()
         $this->assertSame(10.0, $serializer->denormalize(['number' => 10], JsonNumber::class, 'jsonld')->number);
     }
 
+    public function testDoesntHaveIssuesWithUnionConstTypes()
+    {
+        if (!class_exists(PhpStanExtractor::class) || !class_exists(PhpDocParser::class)) {
+            $this->markTestSkipped('phpstan/phpdoc-parser required for this test');
+        }
+
+        $extractor = new PropertyInfoExtractor([], [new PhpStanExtractor(), new PhpDocExtractor(), new ReflectionExtractor()]);
+        $normalizer = new ObjectNormalizer(null, null, null, $extractor);
+        $serializer = new Serializer([new ArrayDenormalizer(), new DateTimeNormalizer(), $normalizer]);
+
+        $this->assertSame('bar', $serializer->denormalize(['foo' => 'bar'], \get_class(new class() {
+            /** @var self::*|null */
+            public $foo;
+        }))->foo);
+    }
+
     public function testExtractAttributesRespectsFormat()
     {
         $normalizer = new FormatAndContextAwareNormalizer();