diff --git a/DependencyInjection/SerializerPass.php b/DependencyInjection/SerializerPass.php
index 994f6124..f5f2cc38 100644
--- a/DependencyInjection/SerializerPass.php
+++ b/DependencyInjection/SerializerPass.php
@@ -89,6 +89,10 @@ private function createNamedSerializerTags(ContainerBuilder $container, string $
         foreach ($container->findTaggedServiceIds($tagName) as $serviceId => $tags) {
             $definition = $container->getDefinition($serviceId);
 
+            if (array_any($tags, $closure = fn (array $tag) => (bool) $tag)) {
+                $tags = array_filter($tags, $closure);
+            }
+
             foreach ($tags as $tag) {
                 $names = (array) ($tag['serializer'] ?? []);
 
diff --git a/Tests/DependencyInjection/SerializerPassTest.php b/Tests/DependencyInjection/SerializerPassTest.php
index dc8d0c75..4945eaa5 100644
--- a/Tests/DependencyInjection/SerializerPassTest.php
+++ b/Tests/DependencyInjection/SerializerPassTest.php
@@ -381,6 +381,62 @@ public function testMultipleNamedSerializerTagsAreResolvedCorrectly()
         $this->assertCount(2, $encoderDefinition->getTag('serializer.encoder.api2'));
     }
 
+    /**
+     * @dataProvider provideEmptyTagsData
+     */
+    public function testEmptyTagsAreIgnoredWhenNonEmptyArePresent(
+        array $tagAttributesList,
+        array $expectedDefaultTags,
+        array $expectedApiTags,
+    ) {
+        $container = new ContainerBuilder();
+
+        $container->setParameter('kernel.debug', false);
+        $container->setParameter('.serializer.named_serializers', ['api' => []]);
+
+        $container->register('serializer')->setArguments([null, null]);
+        $container->register('n0')->addTag('serializer.normalizer', ['serializer' => ['default', 'api']]);
+        $container->register('e0')->addTag('serializer.encoder', ['serializer' => ['default', 'api']]);
+
+        $normalizerDefinition = $container->register('n1')->setTags(['serializer.normalizer' => $tagAttributesList]);
+        $encoderDefinition = $container->register('e1')->setTags(['serializer.encoder' => $tagAttributesList]);
+
+        $serializerPass = new SerializerPass();
+        $serializerPass->process($container);
+
+        $this->assertSame($expectedDefaultTags, $normalizerDefinition->getTag('serializer.normalizer.default'));
+        $this->assertSame($expectedApiTags, $normalizerDefinition->getTag('serializer.normalizer.api'));
+        $this->assertSame($expectedDefaultTags, $encoderDefinition->getTag('serializer.encoder.default'));
+        $this->assertSame($expectedApiTags, $encoderDefinition->getTag('serializer.encoder.api'));
+    }
+
+    public static function provideEmptyTagsData(): iterable
+    {
+        yield 'with default name' => [
+            [[], ['serializer' => 'default']],
+            [[]],
+            [],
+        ];
+
+        yield 'with non-default name' => [
+            [[], ['serializer' => 'api']],
+            [],
+            [[]],
+        ];
+
+        yield 'with wildcard' => [
+            [[], ['serializer' => '*']],
+            [[]],
+            [[]],
+        ];
+
+        yield 'with priority and no name' => [
+            [[], ['priority' => 100]],
+            [['priority' => 100]],
+            [],
+        ];
+    }
+
     public function testThrowExceptionWhenNoNormalizersForNamedSerializers()
     {
         $container = new ContainerBuilder();
diff --git a/Tests/Normalizer/DateTimeNormalizerTest.php b/Tests/Normalizer/DateTimeNormalizerTest.php
index 81219652..eed5db06 100644
--- a/Tests/Normalizer/DateTimeNormalizerTest.php
+++ b/Tests/Normalizer/DateTimeNormalizerTest.php
@@ -54,9 +54,9 @@ public function testNormalizeUsingFormatPassedInConstructor()
 
     public function testNormalizeUsingTimeZonePassedInConstructor()
     {
-        $normalizer = new DateTimeNormalizer([DateTimeNormalizer::TIMEZONE_KEY => new \DateTimeZone('Japan')]);
+        $normalizer = new DateTimeNormalizer([DateTimeNormalizer::TIMEZONE_KEY => new \DateTimeZone('Asia/Tokyo')]);
 
-        $this->assertSame('2016-12-01T00:00:00+09:00', $normalizer->normalize(new \DateTimeImmutable('2016/12/01', new \DateTimeZone('Japan'))));
+        $this->assertSame('2016-12-01T00:00:00+09:00', $normalizer->normalize(new \DateTimeImmutable('2016/12/01', new \DateTimeZone('Asia/Tokyo'))));
         $this->assertSame('2016-12-01T09:00:00+09:00', $normalizer->normalize(new \DateTimeImmutable('2016/12/01', new \DateTimeZone('UTC'))));
     }
 
@@ -73,9 +73,9 @@ public function testNormalizeUsingTimeZonePassedInContext($expected, $input, $ti
     public static function normalizeUsingTimeZonePassedInContextProvider()
     {
         yield ['2016-12-01T00:00:00+00:00', new \DateTimeImmutable('2016/12/01', new \DateTimeZone('UTC')), null];
-        yield ['2016-12-01T00:00:00+09:00', new \DateTimeImmutable('2016/12/01', new \DateTimeZone('Japan')), new \DateTimeZone('Japan')];
-        yield ['2016-12-01T09:00:00+09:00', new \DateTimeImmutable('2016/12/01', new \DateTimeZone('UTC')), new \DateTimeZone('Japan')];
-        yield ['2016-12-01T09:00:00+09:00', new \DateTime('2016/12/01', new \DateTimeZone('UTC')), new \DateTimeZone('Japan')];
+        yield ['2016-12-01T00:00:00+09:00', new \DateTimeImmutable('2016/12/01', new \DateTimeZone('Asia/Tokyo')), new \DateTimeZone('Asia/Tokyo')];
+        yield ['2016-12-01T09:00:00+09:00', new \DateTimeImmutable('2016/12/01', new \DateTimeZone('UTC')), new \DateTimeZone('Asia/Tokyo')];
+        yield ['2016-12-01T09:00:00+09:00', new \DateTime('2016/12/01', new \DateTimeZone('UTC')), new \DateTimeZone('Asia/Tokyo')];
     }
 
     /**
@@ -139,7 +139,7 @@ public static function normalizeUsingTimeZonePassedInContextAndExpectedFormatWit
                 '2018-12-01T18:03:06.067634',
                 new \DateTimeZone('UTC')
             ),
-            new \DateTimeZone('Europe/Kiev'),
+            new \DateTimeZone('Europe/Kyiv'),
         ];
 
         yield [
@@ -253,7 +253,7 @@ public function testDenormalize()
 
     public function testDenormalizeUsingTimezonePassedInConstructor()
     {
-        $timezone = new \DateTimeZone('Japan');
+        $timezone = new \DateTimeZone('Asia/Tokyo');
         $expected = new \DateTimeImmutable('2016/12/01 17:35:00', $timezone);
         $normalizer = new DateTimeNormalizer([DateTimeNormalizer::TIMEZONE_KEY => $timezone]);
 
@@ -286,18 +286,18 @@ public static function denormalizeUsingTimezonePassedInContextProvider()
     {
         yield 'with timezone' => [
             '2016/12/01 17:35:00',
-            new \DateTimeImmutable('2016/12/01 17:35:00', new \DateTimeZone('Japan')),
-            new \DateTimeZone('Japan'),
+            new \DateTimeImmutable('2016/12/01 17:35:00', new \DateTimeZone('Asia/Tokyo')),
+            new \DateTimeZone('Asia/Tokyo'),
         ];
         yield 'with timezone as string' => [
             '2016/12/01 17:35:00',
-            new \DateTimeImmutable('2016/12/01 17:35:00', new \DateTimeZone('Japan')),
-            'Japan',
+            new \DateTimeImmutable('2016/12/01 17:35:00', new \DateTimeZone('Asia/Tokyo')),
+            'Asia/Tokyo',
         ];
         yield 'with format without timezone information' => [
             '2016.12.01 17:35:00',
-            new \DateTimeImmutable('2016/12/01 17:35:00', new \DateTimeZone('Japan')),
-            new \DateTimeZone('Japan'),
+            new \DateTimeImmutable('2016/12/01 17:35:00', new \DateTimeZone('Asia/Tokyo')),
+            new \DateTimeZone('Asia/Tokyo'),
             'Y.m.d H:i:s',
         ];
         yield 'ignored with format with timezone information' => [
diff --git a/composer.json b/composer.json
index 1c4d384b..52956625 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,8 @@
     "require": {
         "php": ">=8.2",
         "symfony/deprecation-contracts": "^2.5|^3",
-        "symfony/polyfill-ctype": "~1.8"
+        "symfony/polyfill-ctype": "~1.8",
+        "symfony/polyfill-php84": "^1.30"
     },
     "require-dev": {
         "phpdocumentor/reflection-docblock": "^3.2|^4.0|^5.0",