diff --git a/src/M6Web/Component/RedisMock/RedisMock.php b/src/M6Web/Component/RedisMock/RedisMock.php
index 5b4597c..b5261af 100644
--- a/src/M6Web/Component/RedisMock/RedisMock.php
+++ b/src/M6Web/Component/RedisMock/RedisMock.php
@@ -910,7 +910,7 @@ protected function zrangebyscoreHelper($key, $min, $max, array $options = array(
         if ($min == '-inf' && $max == '+inf') {
             $slice = array_slice(self::$dataValues[$this->storage][$key], $options['limit'][0], $options['limit'][1], true);
             if (isset($options['withscores']) && $options['withscores']) {
-                return $this->returnPipedInfo($slice);
+                return $this->returnPipedInfo(array_map('strval', $slice));
             } else {
                 return $this->returnPipedInfo(array_keys($slice));
             }
@@ -947,14 +947,12 @@ protected function zrangebyscoreHelper($key, $min, $max, array $options = array(
 
         $slice = array_slice($results, $options['limit'][0], $options['limit'][1], true);
         if (isset($options['withscores']) && $options['withscores']) {
-            return $this->returnPipedInfo($slice);
+            return $this->returnPipedInfo(array_map('strval', $slice));
         } else {
             return $this->returnPipedInfo(array_keys($slice));
         }
     }
 
-
-
     public function zrangebyscore($key, $min, $max, array $options = array())
     {
         return $this->zrangebyscoreHelper($key, $min, $max, $options, false);
@@ -965,7 +963,6 @@ public function zrevrangebyscore($key, $max, $min, array $options = array())
         return $this->zrangebyscoreHelper($key, $min, $max, $options, true);
     }
 
-
     public function zadd($key, ...$args) {
         if (count($args) === 1) {
             if (count($args[0]) > 1) {
@@ -1010,7 +1007,7 @@ public function zscore($key, $member)
             return $this->returnPipedInfo(null);
         }
 
-        return $this->returnPipedInfo(self::$dataValues[$this->storage][$key][$member]);
+        return $this->returnPipedInfo((string) self::$dataValues[$this->storage][$key][$member]);
     }
 
     public function zcard($key)
diff --git a/tests/units/RedisMock.php b/tests/units/RedisMock.php
index 4726bb6..8b6b17c 100644
--- a/tests/units/RedisMock.php
+++ b/tests/units/RedisMock.php
@@ -717,11 +717,11 @@ public function testZScore()
         $redisMock->zadd('test', 15, 'test2');
 
         $this->assert
-            ->integer($redisMock->zscore('test', 'test4'))
+            ->string($redisMock->zscore('test', 'test4'))
             ->isEqualTo(1);
 
         $this->assert
-            ->integer($redisMock->zscore('test', 'test2'))
+            ->string($redisMock->zscore('test', 'test2'))
             ->isEqualTo(15);
 
         $this->assert
@@ -960,10 +960,10 @@ public function testZRevRange()
                     'test6',
                 ))
             ->array($redisMock->zrevrange('test', 1, -3, true))
-                ->isEqualTo(array(
-                    'test2' => 15,
-                    'test3' => 2,
-                    'test4' => 1,
+                ->isIdenticalTo(array(
+                    'test2' => '15',
+                    'test3' => '2',
+                    'test4' => '1',
                 ))
             ->integer($redisMock->del('test'))
                 ->isEqualTo(6)
@@ -1058,10 +1058,10 @@ public function testZRangeByScore()
                     'test3',
                 ))
             ->array($redisMock->zrangebyscore('test', '-inf', '15', array('limit' => array(1, 3), 'withscores' => true)))
-                ->isEqualTo(array(
-                    'test1' => 1,
-                    'test4' => 1,
-                    'test3' => 2,
+                ->isIdenticalTo(array(
+                    'test1' => '1',
+                    'test4' => '1',
+                    'test3' => '2',
                 ))
             ->integer($redisMock->del('test'))
                 ->isEqualTo(6)
@@ -1155,10 +1155,10 @@ public function testZRevRangeByScore()
                     'test1',
                 ))
             ->array($redisMock->zrevrangebyscore('test', '15', '-inf', array('limit' => array(1, 3), 'withscores' => true)))
-                ->isEqualTo(array(
-                    'test3' => 2,
-                    'test4' => 1,
-                    'test1' => 1,
+                ->isIdenticalTo(array(
+                    'test3' => '2',
+                    'test4' => '1',
+                    'test1' => '1',
                 ))
             ->integer($redisMock->del('test'))
                 ->isEqualTo(6)
@@ -1171,7 +1171,7 @@ public function testZRevRangeByScore()
         sleep(2);
         $this->assert
             ->array($redisMock->zrevrangebyscore('test', '1', '0'))
-                ->isEmpty();;
+                ->isEmpty();
     }
 
     public function testHSetHMSetHGetHDelHExistsHKeysHLenHGetAll()