diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index 3bf7a73..2db2a01 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -52,6 +52,8 @@ jobs:
       -
         name: Install dependencies
         run: composer install --prefer-dist
+      - name: Test cs-fixer
+        run: vendor/bin/php-cs-fixer fix src --dry-run --diff --no-ansi
       - name: Run phpstan
         run: vendor/bin/phpstan analyse src
       - name: Run tests
diff --git a/src/Client/RedisClient.php b/src/Client/RedisClient.php
index 1fe2ea6..43a7d95 100644
--- a/src/Client/RedisClient.php
+++ b/src/Client/RedisClient.php
@@ -15,31 +15,40 @@ public function __construct(protected ?\Redis $redis = null)
         $this->redis = $redis ?? new \Redis($_SERVER['REDIS_HOST'] ? ['host' => $_SERVER['REDIS_HOST']] : null);
     }
 
-    public function hashMultiSet(string $key, array $data): bool|self
+    public function hMSet(string $key, array $data): void
     {
-        return $this->redis->hMSet(RedisClient::convertPrefix($key), $data);
+        $result = $this->redis->hMSet(RedisClient::convertPrefix($key), $data);
+
+        if (!$result) {
+            $this->handleError(__METHOD__, $this->redis->getLastError());
+        }
     }
 
-    public function hashGetAll(string $key): array
+    public function hGetAll(string $key): array
     {
-        return $this->redis->hGetAll(RedisClient::convertPrefix($key));
+        $result = $this->redis->hGetAll(RedisClient::convertPrefix($key));
+
+        if ($result === false) {
+            $this->handleError(__METHOD__, $this->redis->getLastError());
+        }
+
+        return $result;
     }
 
-    public function remove(string $key): false|int|self
+    public function del(string $key): void
     {
-        return $this->redis->del(RedisClient::convertPrefix($key));
+        $result = $this->redis->del(RedisClient::convertPrefix($key));
+        if (!$result) {
+            $this->handleError(__METHOD__, $this->redis->getLastError());
+        }
     }
 
     public function jsonGet(string $key): ?string
     {
         $result = $this->redis->rawCommand(RedisCommands::JSON_GET->value, static::convertPrefix($key));
 
-        if (!$result) {
-            if (($error = $this->redis->getLastError()) === null) {
-                return null;
-            }
-
-            $this->handleError(RedisCommands::JSON_GET->value, $error);
+        if ($result === false) {
+            $this->handleError(RedisCommands::JSON_GET->value, $this->redis->getLastError());
         }
 
         return $result;
diff --git a/src/Client/RedisClientInterface.php b/src/Client/RedisClientInterface.php
index 56ceed9..64695c5 100644
--- a/src/Client/RedisClientInterface.php
+++ b/src/Client/RedisClientInterface.php
@@ -8,9 +8,9 @@
 
 interface RedisClientInterface
 {
-    public function hashMultiSet(string $key, array $data): bool|self;
-    public function hashGetAll(string $key): array;
-    public function remove(string $key): false|int|self;
+    public function hMSet(string $key, array $data): void;
+    public function hGetAll(string $key): array;
+    public function del(string $key): void;
     public function jsonGet(string $key): ?string;
     public function jsonSet(string $key, ?string $path = '$', ?string $value = '{}'): ?bool;
     public function jsonDel(string $key, ?string $path = '$'): ?bool;
diff --git a/src/Om/Persister/AbstractPersister.php b/src/Om/Persister/AbstractPersister.php
index bcf91e8..f49f2b4 100644
--- a/src/Om/Persister/AbstractPersister.php
+++ b/src/Om/Persister/AbstractPersister.php
@@ -21,7 +21,7 @@ public function __construct(private ?KeyGenerator $keyGenerator = null)
     }
 
     /**
-     * @return array<string, string>
+     * @return array<string, ObjectToPersist>
      */
     public function persist(Entity $objectMapper, $object): ObjectToPersist
     {
diff --git a/src/Om/Persister/HashModel/HashPersister.php b/src/Om/Persister/HashModel/HashPersister.php
index 76c2236..bef7136 100644
--- a/src/Om/Persister/HashModel/HashPersister.php
+++ b/src/Om/Persister/HashModel/HashPersister.php
@@ -14,11 +14,11 @@ public function doPersist(string $key, $data): void
             throw new \InvalidArgumentException('Redis hMSet() method #2 argument must be an array.');
         }
 
-        $this->redis->hashMultiSet($key, $data);
+        $this->redis->hMSet($key, $data);
     }
 
     public function doDelete(string $key): void
     {
-        $this->redis->remove($key);
+        $this->redis->del($key);
     }
 }
diff --git a/src/Om/Repository/HashModel/HashRepository.php b/src/Om/Repository/HashModel/HashRepository.php
index e191791..323feee 100644
--- a/src/Om/Repository/HashModel/HashRepository.php
+++ b/src/Om/Repository/HashModel/HashRepository.php
@@ -13,7 +13,7 @@ final class HashRepository extends AbstractObjectRepository
 
     public function find(string $identifier): ?object
     {
-        $data = $this->redisClient->hashGetAll("$this->prefix:$identifier");
+        $data = $this->redisClient->hGetAll("$this->prefix:$identifier");
         if (!$data) {
             return null;
         }
diff --git a/tests/Client/Client.php b/tests/Client/Client.php
index de04e81..4c23ae6 100644
--- a/tests/Client/Client.php
+++ b/tests/Client/Client.php
@@ -11,6 +11,6 @@ class Client extends RedisClient
     public function __construct()
     {
         parent::__construct();
-        $this->redis->pconnect('redis');
+        $this->redis->pconnect($_SERVER['REDIS_HOST']);
     }
 }