diff --git a/tests/Fixtures/DataFalse.php b/tests/Fixtures/DataFalse.php
index ce3d2632f..5c7301cf8 100644
--- a/tests/Fixtures/DataFalse.php
+++ b/tests/Fixtures/DataFalse.php
@@ -6,8 +6,11 @@
 
 class DataFalse
 {
+    public false $data;
+
     public function __construct(
-        public false $data
+        false $data
     ) {
+        $this->data = $data;
     }
 }
diff --git a/tests/Fixtures/DataTrue.php b/tests/Fixtures/DataTrue.php
index 0bfe05b68..9e3f2b09f 100644
--- a/tests/Fixtures/DataTrue.php
+++ b/tests/Fixtures/DataTrue.php
@@ -7,4 +7,10 @@
 class DataTrue
 {
     public true $data;
+
+    public function __construct(
+        true $data
+    ) {
+        $this->data = $data;
+    }
 }
diff --git a/tests/Serializer/JsonSerializationTest.php b/tests/Serializer/JsonSerializationTest.php
index 7f59ca0d7..b41c771df 100644
--- a/tests/Serializer/JsonSerializationTest.php
+++ b/tests/Serializer/JsonSerializationTest.php
@@ -16,6 +16,7 @@
 use JMS\Serializer\Tests\Fixtures\Author;
 use JMS\Serializer\Tests\Fixtures\AuthorList;
 use JMS\Serializer\Tests\Fixtures\DataFalse;
+use JMS\Serializer\Tests\Fixtures\DataTrue;
 use JMS\Serializer\Tests\Fixtures\DiscriminatedAuthor;
 use JMS\Serializer\Tests\Fixtures\DiscriminatedComment;
 use JMS\Serializer\Tests\Fixtures\FirstClassMapCollection;
@@ -28,6 +29,7 @@
 use JMS\Serializer\Visitor\Factory\JsonSerializationVisitorFactory;
 use JMS\Serializer\Visitor\SerializationVisitorInterface;
 use PHPUnit\Framework\Attributes\DataProvider;
+use TypeError;
 
 class JsonSerializationTest extends BaseSerializationTestCase
 {
@@ -483,10 +485,33 @@ public function testSerializingUnionProperties()
         self::assertEquals(static::getContent('data_string'), $serialized);
     }
 
+    public function testTrueDataType()
+    {
+        if (PHP_VERSION_ID < 80200) {
+            $this->markTestSkipped('True type requires PHP 8.2');
+
+            return;
+        }
+
+        self::assertEquals(
+            static::getContent('data_true'),
+            $this->serialize(new DataTrue(true)),
+        );
+
+        self::assertEquals(
+            new DataTrue(true),
+            $this->deserialize(static::getContent('data_true'), DataTrue::class),
+        );
+
+        $this->expectException(TypeError::class);
+        $this->deserialize(static::getContent('data_false'), DataTrue::class);
+    }
+
     public function testFalseDataType()
     {
         if (PHP_VERSION_ID < 80200) {
             $this->markTestSkipped('False type requires PHP 8.2');
+
             return;
         }
 
@@ -500,11 +525,8 @@ public function testFalseDataType()
             $this->deserialize(static::getContent('data_false'), DataFalse::class),
         );
 
-        //What should we expect here?
-        self::assertEquals(
-            null,
-            $this->deserialize(static::getContent('data_true'), DataFalse::class),
-        );
+        $this->expectException(TypeError::class);
+        $this->deserialize(static::getContent('data_true'), DataFalse::class);
     }
 
     public function testDeserializingComplexDiscriminatedUnionProperties()