diff --git a/Debug/TraceableSerializer.php b/Debug/TraceableSerializer.php
index f3d14a2b..9cf7bad8 100644
--- a/Debug/TraceableSerializer.php
+++ b/Debug/TraceableSerializer.php
@@ -37,7 +37,7 @@ public function __construct(
 
     public function serialize(mixed $data, string $format, array $context = []): string
     {
-        $context[self::DEBUG_TRACE_ID] = $traceId = uniqid();
+        $context[self::DEBUG_TRACE_ID] = $traceId = uniqid('', true);
 
         $startTime = microtime(true);
         $result = $this->serializer->serialize($data, $format, $context);
@@ -52,7 +52,7 @@ public function serialize(mixed $data, string $format, array $context = []): str
 
     public function deserialize(mixed $data, string $type, string $format, array $context = []): mixed
     {
-        $context[self::DEBUG_TRACE_ID] = $traceId = uniqid();
+        $context[self::DEBUG_TRACE_ID] = $traceId = uniqid('', true);
 
         $startTime = microtime(true);
         $result = $this->serializer->deserialize($data, $type, $format, $context);
@@ -67,7 +67,7 @@ public function deserialize(mixed $data, string $type, string $format, array $co
 
     public function normalize(mixed $object, ?string $format = null, array $context = []): array|string|int|float|bool|\ArrayObject|null
     {
-        $context[self::DEBUG_TRACE_ID] = $traceId = uniqid();
+        $context[self::DEBUG_TRACE_ID] = $traceId = uniqid('', true);
 
         $startTime = microtime(true);
         $result = $this->serializer->normalize($object, $format, $context);
@@ -82,7 +82,7 @@ public function normalize(mixed $object, ?string $format = null, array $context
 
     public function denormalize(mixed $data, string $type, ?string $format = null, array $context = []): mixed
     {
-        $context[self::DEBUG_TRACE_ID] = $traceId = uniqid();
+        $context[self::DEBUG_TRACE_ID] = $traceId = uniqid('', true);
 
         $startTime = microtime(true);
         $result = $this->serializer->denormalize($data, $type, $format, $context);
@@ -97,7 +97,7 @@ public function denormalize(mixed $data, string $type, ?string $format = null, a
 
     public function encode(mixed $data, string $format, array $context = []): string
     {
-        $context[self::DEBUG_TRACE_ID] = $traceId = uniqid();
+        $context[self::DEBUG_TRACE_ID] = $traceId = uniqid('', true);
 
         $startTime = microtime(true);
         $result = $this->serializer->encode($data, $format, $context);
@@ -112,7 +112,7 @@ public function encode(mixed $data, string $format, array $context = []): string
 
     public function decode(string $data, string $format, array $context = []): mixed
     {
-        $context[self::DEBUG_TRACE_ID] = $traceId = uniqid();
+        $context[self::DEBUG_TRACE_ID] = $traceId = uniqid('', true);
 
         $startTime = microtime(true);
         $result = $this->serializer->decode($data, $format, $context);
diff --git a/Normalizer/ArrayDenormalizer.php b/Normalizer/ArrayDenormalizer.php
index 1bd6c54b..347030c2 100644
--- a/Normalizer/ArrayDenormalizer.php
+++ b/Normalizer/ArrayDenormalizer.php
@@ -44,7 +44,7 @@ public function getSupportedTypes(?string $format): array
      */
     public function denormalize(mixed $data, string $type, ?string $format = null, array $context = []): array
     {
-        if (null === $this->denormalizer) {
+        if (!isset($this->denormalizer)) {
             throw new BadMethodCallException('Please set a denormalizer before calling denormalize()!');
         }
         if (!\is_array($data)) {
@@ -79,7 +79,7 @@ public function denormalize(mixed $data, string $type, ?string $format = null, a
 
     public function supportsDenormalization(mixed $data, string $type, ?string $format = null, array $context = []): bool
     {
-        if (null === $this->denormalizer) {
+        if (!isset($this->denormalizer)) {
             throw new BadMethodCallException(sprintf('The nested denormalizer needs to be set to allow "%s()" to be used.', __METHOD__));
         }
 
diff --git a/Tests/Mapping/Factory/ClassMetadataFactoryCompilerTest.php b/Tests/Mapping/Factory/ClassMetadataFactoryCompilerTest.php
index 1826d3dc..20b05721 100644
--- a/Tests/Mapping/Factory/ClassMetadataFactoryCompilerTest.php
+++ b/Tests/Mapping/Factory/ClassMetadataFactoryCompilerTest.php
@@ -27,7 +27,7 @@ final class ClassMetadataFactoryCompilerTest extends TestCase
 
     protected function setUp(): void
     {
-        $this->dumpPath = sys_get_temp_dir().\DIRECTORY_SEPARATOR.'php_serializer_metadata.'.uniqid('CompiledClassMetadataFactory').'.php';
+        $this->dumpPath = sys_get_temp_dir().\DIRECTORY_SEPARATOR.'php_serializer_metadata.'.uniqid('CompiledClassMetadataFactory', true).'.php';
     }
 
     protected function tearDown(): void
diff --git a/Tests/Normalizer/ArrayDenormalizerTest.php b/Tests/Normalizer/ArrayDenormalizerTest.php
index be4a30d8..b60f57ba 100644
--- a/Tests/Normalizer/ArrayDenormalizerTest.php
+++ b/Tests/Normalizer/ArrayDenormalizerTest.php
@@ -108,6 +108,22 @@ public function testSupportsNoArray()
             )
         );
     }
+
+    public function testDenormalizeWithoutDenormalizer()
+    {
+        $arrayDenormalizer = new ArrayDenormalizer();
+
+        $this->expectException(\BadMethodCallException::class);
+        $arrayDenormalizer->denormalize([], 'string[]');
+    }
+
+    public function testSupportsDenormalizationWithoutDenormalizer()
+    {
+        $arrayDenormalizer = new ArrayDenormalizer();
+
+        $this->expectException(\BadMethodCallException::class);
+        $arrayDenormalizer->supportsDenormalization([], 'string[]');
+    }
 }
 
 class ArrayDummy