diff --git a/.github/workflows/security-standards.yml b/.github/workflows/security-standards.yml
index 61b240c..445cd42 100644
--- a/.github/workflows/security-standards.yml
+++ b/.github/workflows/security-standards.yml
@@ -31,6 +31,7 @@ jobs:
       enable_postgres_service: true
       enable_mysql_service: true
       enable_scylladb_service: true
+      enable_elasticsearch_service: false
       enable_mongodb_service: true
       service_db_name: "cachelayer"
       service_db_user: "cachelayer"
diff --git a/src/Cache/Adapter/ApcuCacheAdapter.php b/src/Cache/Adapter/ApcuCacheAdapter.php
index cb3fece..fe3685d 100644
--- a/src/Cache/Adapter/ApcuCacheAdapter.php
+++ b/src/Cache/Adapter/ApcuCacheAdapter.php
@@ -169,7 +169,7 @@ protected function supportsItem(CacheItemInterface $item): bool
     private function appendFetchedHit(array &$items, array &$stale, string $key, array $raw): bool
     {
         $mapped = $this->map($key);
-        if (!array_key_exists($mapped, $raw) || !is_string($raw[$mapped])) {
+        if (!isset($raw[$mapped]) || !is_string($raw[$mapped])) {
             return false;
         }
 
diff --git a/src/Memoize/OnceMemoizer.php b/src/Memoize/OnceMemoizer.php
index bed544f..d3ef410 100644
--- a/src/Memoize/OnceMemoizer.php
+++ b/src/Memoize/OnceMemoizer.php
@@ -117,10 +117,6 @@ private function normalizeCallerFunction(string $callerFunction): string
 
     private function trackCacheKey(string $key): void
     {
-        if (in_array($key, $this->order, true)) {
-            return;
-        }
-
         $this->order[] = $key;
         if (count($this->order) <= self::LIMIT) {
             return;
diff --git a/tests/Cache/ApcuCachePoolTest.php b/tests/Cache/ApcuCachePoolTest.php
index a00c4f9..93f2954 100644
--- a/tests/Cache/ApcuCachePoolTest.php
+++ b/tests/Cache/ApcuCachePoolTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * tests/ApcuCachePoolTest.php
  *
diff --git a/tests/Cache/ArrayCachePoolTest.php b/tests/Cache/ArrayCachePoolTest.php
index e048c08..1ca9934 100644
--- a/tests/Cache/ArrayCachePoolTest.php
+++ b/tests/Cache/ArrayCachePoolTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Infocyph\CacheLayer\Cache\Cache;
 use Infocyph\CacheLayer\Cache\Item\GenericCacheItem;
 
diff --git a/tests/Cache/CacheFeaturesTest.php b/tests/Cache/CacheFeaturesTest.php
index 10efc68..fe5239c 100644
--- a/tests/Cache/CacheFeaturesTest.php
+++ b/tests/Cache/CacheFeaturesTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Infocyph\CacheLayer\Cache\Cache;
 use Infocyph\CacheLayer\Cache\Lock\LockHandle;
 use Infocyph\CacheLayer\Cache\Lock\LockProviderInterface;
diff --git a/tests/Cache/CachePayloadCodecSecurityTest.php b/tests/Cache/CachePayloadCodecSecurityTest.php
index 0708b4e..e511bab 100644
--- a/tests/Cache/CachePayloadCodecSecurityTest.php
+++ b/tests/Cache/CachePayloadCodecSecurityTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Infocyph\CacheLayer\Cache\Adapter\CachePayloadCodec;
 
 beforeEach(function () {
diff --git a/tests/Cache/ChainCachePoolTest.php b/tests/Cache/ChainCachePoolTest.php
index 38160ae..915e9e0 100644
--- a/tests/Cache/ChainCachePoolTest.php
+++ b/tests/Cache/ChainCachePoolTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Infocyph\CacheLayer\Cache\Adapter\ArrayCacheAdapter;
 use Infocyph\CacheLayer\Cache\Cache;
 use Infocyph\CacheLayer\Exceptions\CacheInvalidArgumentException;
diff --git a/tests/Cache/FileCachePoolTest.php b/tests/Cache/FileCachePoolTest.php
index 7580e3e..58328b8 100644
--- a/tests/Cache/FileCachePoolTest.php
+++ b/tests/Cache/FileCachePoolTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**  tests/FileCachePoolTest.php  */
 
 use Infocyph\CacheLayer\Cache\Cache;
diff --git a/tests/Cache/MemCachePoolTest.php b/tests/Cache/MemCachePoolTest.php
index 93aae9b..3809f5e 100644
--- a/tests/Cache/MemCachePoolTest.php
+++ b/tests/Cache/MemCachePoolTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * tests/MemCachePoolTest.php
  *
diff --git a/tests/Cache/MongoDbCachePoolTest.php b/tests/Cache/MongoDbCachePoolTest.php
index c3e231a..c6049fc 100644
--- a/tests/Cache/MongoDbCachePoolTest.php
+++ b/tests/Cache/MongoDbCachePoolTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Infocyph\CacheLayer\Cache\Adapter\MongoDbCacheAdapter;
 use Infocyph\CacheLayer\Cache\Cache;
 
diff --git a/tests/Cache/NullCachePoolTest.php b/tests/Cache/NullCachePoolTest.php
index 3cc390b..cfff432 100644
--- a/tests/Cache/NullCachePoolTest.php
+++ b/tests/Cache/NullCachePoolTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Infocyph\CacheLayer\Cache\Cache;
 
 beforeEach(function () {
diff --git a/tests/Cache/PdoCachePoolTest.php b/tests/Cache/PdoCachePoolTest.php
index 48b2902..d693a45 100644
--- a/tests/Cache/PdoCachePoolTest.php
+++ b/tests/Cache/PdoCachePoolTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Infocyph\CacheLayer\Cache\Adapter\PdoCacheAdapter;
 use Infocyph\CacheLayer\Cache\Cache;
 use Infocyph\CacheLayer\Cache\Lock\FileLockProvider;
diff --git a/tests/Cache/PdoMysqlCachePoolTest.php b/tests/Cache/PdoMysqlCachePoolTest.php
index d02c60e..7ee8053 100644
--- a/tests/Cache/PdoMysqlCachePoolTest.php
+++ b/tests/Cache/PdoMysqlCachePoolTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Infocyph\CacheLayer\Cache\Cache;
 
 if (! in_array('mysql', PDO::getAvailableDrivers(), true)) {
diff --git a/tests/Cache/PdoPgsqlCachePoolTest.php b/tests/Cache/PdoPgsqlCachePoolTest.php
index 7b94359..2f010f2 100644
--- a/tests/Cache/PdoPgsqlCachePoolTest.php
+++ b/tests/Cache/PdoPgsqlCachePoolTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Infocyph\CacheLayer\Cache\Cache;
 
 if (! in_array('pgsql', PDO::getAvailableDrivers(), true)) {
diff --git a/tests/Cache/PhpFilesCachePoolTest.php b/tests/Cache/PhpFilesCachePoolTest.php
index 0379b48..5d157af 100644
--- a/tests/Cache/PhpFilesCachePoolTest.php
+++ b/tests/Cache/PhpFilesCachePoolTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Infocyph\CacheLayer\Cache\Cache;
 
 beforeEach(function () {
diff --git a/tests/Cache/RedisCachePoolTest.php b/tests/Cache/RedisCachePoolTest.php
index 7a60364..c6ebf85 100644
--- a/tests/Cache/RedisCachePoolTest.php
+++ b/tests/Cache/RedisCachePoolTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * tests/RedisCachePoolTest.php
  *
diff --git a/tests/Cache/RedisClusterCachePoolTest.php b/tests/Cache/RedisClusterCachePoolTest.php
index 79a0b15..4b19f8a 100644
--- a/tests/Cache/RedisClusterCachePoolTest.php
+++ b/tests/Cache/RedisClusterCachePoolTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Infocyph\CacheLayer\Cache\Cache;
 
 beforeEach(function () {
diff --git a/tests/Cache/ScyllaDbCachePoolTest.php b/tests/Cache/ScyllaDbCachePoolTest.php
index 564da01..14fe080 100644
--- a/tests/Cache/ScyllaDbCachePoolTest.php
+++ b/tests/Cache/ScyllaDbCachePoolTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Infocyph\CacheLayer\Cache\Adapter\ScyllaDbCacheAdapter;
 use Infocyph\CacheLayer\Cache\Cache;
 use Infocyph\CacheLayer\Exceptions\CacheInvalidArgumentException;
diff --git a/tests/Cache/SharedMemoryCachePoolTest.php b/tests/Cache/SharedMemoryCachePoolTest.php
index 8d1001c..69fb5d3 100644
--- a/tests/Cache/SharedMemoryCachePoolTest.php
+++ b/tests/Cache/SharedMemoryCachePoolTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Infocyph\CacheLayer\Cache\Cache;
 
 if (! function_exists('shm_attach')) {
diff --git a/tests/Cache/SqliteCachePoolTest.php b/tests/Cache/SqliteCachePoolTest.php
index 75d2b77..bd1280c 100644
--- a/tests/Cache/SqliteCachePoolTest.php
+++ b/tests/Cache/SqliteCachePoolTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * tests/SqliteCachePoolTest.php
  *
diff --git a/tests/Cache/ValkeyCachePoolTest.php b/tests/Cache/ValkeyCachePoolTest.php
index 14963d5..0763b3a 100644
--- a/tests/Cache/ValkeyCachePoolTest.php
+++ b/tests/Cache/ValkeyCachePoolTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Infocyph\CacheLayer\Cache\Cache;
 
 if (! class_exists(Redis::class)) {
diff --git a/tests/Cache/WeakMapCachePoolTest.php b/tests/Cache/WeakMapCachePoolTest.php
index edb094c..d133f04 100644
--- a/tests/Cache/WeakMapCachePoolTest.php
+++ b/tests/Cache/WeakMapCachePoolTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Infocyph\CacheLayer\Cache\Cache;
 
 beforeEach(function () {
diff --git a/tests/Cluster/ClusterCacheTest.php b/tests/Cluster/ClusterCacheTest.php
index 14e08ad..1e98516 100644
--- a/tests/Cluster/ClusterCacheTest.php
+++ b/tests/Cluster/ClusterCacheTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Infocyph\CacheLayer\Cluster\ClusterCache;
 use Infocyph\CacheLayer\Cluster\ClusterCacheConfig;
 use Infocyph\CacheLayer\Cluster\Event\InvalidationEvent;
diff --git a/tests/Memoize/MemoizeTest.php b/tests/Memoize/MemoizeTest.php
index 7c9e4c6..93b27b2 100644
--- a/tests/Memoize/MemoizeTest.php
+++ b/tests/Memoize/MemoizeTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Infocyph\CacheLayer\Memoize\Memoizer;
 use Infocyph\CacheLayer\Memoize\MemoizeTrait;
 use Infocyph\CacheLayer\Memoize\OnceMemoizer;
diff --git a/tests/Memoize/OnceMemoizerTest.php b/tests/Memoize/OnceMemoizerTest.php
index 93839ee..1230682 100644
--- a/tests/Memoize/OnceMemoizerTest.php
+++ b/tests/Memoize/OnceMemoizerTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Infocyph\CacheLayer\Memoize\OnceMemoizer;
 
 beforeEach(function () {
diff --git a/tests/Node/NodeCacheTest.php b/tests/Node/NodeCacheTest.php
index 46ff831..5b4b202 100644
--- a/tests/Node/NodeCacheTest.php
+++ b/tests/Node/NodeCacheTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Infocyph\CacheLayer\Cache\Adapter\ArrayCacheAdapter;
 use Infocyph\CacheLayer\Cache\Cache;
 use Infocyph\CacheLayer\Cache\Lock\LockHandle;
diff --git a/tests/Serializer/ValueSerializerTest.php b/tests/Serializer/ValueSerializerTest.php
index 490c082..a85f155 100644
--- a/tests/Serializer/ValueSerializerTest.php
+++ b/tests/Serializer/ValueSerializerTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 // tests/Serializer/ValueSerializerTest.php
 
 use Infocyph\CacheLayer\Serializer\ValueSerializer;