diff --git a/src/Matcher/ArrayMatcher.php b/src/Matcher/ArrayMatcher.php
index 1cf47187..c811ffbd 100644
--- a/src/Matcher/ArrayMatcher.php
+++ b/src/Matcher/ArrayMatcher.php
@@ -6,13 +6,14 @@
 use Coduo\ToString\StringConverter;
 use Symfony\Component\PropertyAccess\PropertyAccess;
 use Symfony\Component\PropertyAccess\PropertyAccessor;
+use Symfony\Component\PropertyAccess\PropertyPath;
 
 final class ArrayMatcher extends Matcher
 {
     const UNBOUNDED_PATTERN = '@...@';
 
     /**
-     * @var PropertyMatcher
+     * @var ValueMatcher
      */
     private $propertyMatcher;
 
@@ -147,7 +148,7 @@ private function isPatternValid(array $pattern, array $values, $parentPath)
 
             if (count($notExistingKeys) > 0) {
                 $keyNames = array_keys($notExistingKeys);
-                $path = $this->formatFullPath($parentPath,  $this->formatAccessPath($keyNames[0]));
+                $path = $this->formatFullPath($parentPath, $this->formatAccessPath($keyNames[0]));
                 $this->setMissingElementInError('value', $path);
                 return false;
             }
@@ -180,7 +181,33 @@ private function valueMatchPattern($value, $pattern)
      */
     private function valueExist($path, array $haystack)
     {
-        return null !== $this->getPropertyAccessor()->getValue($haystack, $path);
+        $propertyPath = new PropertyPath($path);
+        $length = $propertyPath->getLength();
+        $valueExist = true;
+        for ($i = 0; $i < $length; ++$i) {
+            $property = $propertyPath->getElement($i);
+            $isIndex = $propertyPath->isIndex($i);
+            $propertyExist = $this->arrayPropertyExists($property, $haystack);
+
+            if ($isIndex && !$propertyExist) {
+                $valueExist = false;
+                break;
+            }
+        }
+
+        unset($propertyPath);
+        return $valueExist;
+    }
+
+    /**
+     * @param string $property
+     * @param array $objectOrArray
+     * @return bool
+     */
+    private function arrayPropertyExists($property, array $objectOrArray)
+    {
+        return ($objectOrArray instanceof \ArrayAccess && isset($objectOrArray[$property])) ||
+            (is_array($objectOrArray) && array_key_exists($property, $objectOrArray));
     }
 
     /**
diff --git a/src/Matcher/NullMatcher.php b/src/Matcher/NullMatcher.php
index f6b96038..f3e891d4 100644
--- a/src/Matcher/NullMatcher.php
+++ b/src/Matcher/NullMatcher.php
@@ -26,6 +26,6 @@ public function match($value, $pattern)
      */
     public function canMatch($pattern)
     {
-        return $pattern === null || (is_string($pattern) && 0 !== preg_match(self::MATCH_PATTERN, $pattern));
+        return is_null($pattern) || (is_string($pattern) && 0 !== preg_match(self::MATCH_PATTERN, $pattern));
     }
 }
diff --git a/tests/Matcher/ArrayMatcherTest.php b/tests/Matcher/ArrayMatcherTest.php
index 864b5b86..eb009740 100644
--- a/tests/Matcher/ArrayMatcherTest.php
+++ b/tests/Matcher/ArrayMatcherTest.php
@@ -72,7 +72,7 @@ public function test_error_when_path_in_nested_pattern_does_not_exist()
         $array = array('foo' => array('bar' => array('baz' => 'bar value')));
         $pattern = array('foo' => array('bar' => array('faz' => 'faz value')));
 
-        $this->assertFalse($this->matcher->match($array,$pattern));
+        $this->assertFalse($this->matcher->match($array, $pattern));
 
         $this->assertEquals($this->matcher->getError(), 'There is no element under path [foo][bar][baz] in pattern.');
     }
@@ -124,7 +124,7 @@ public function test_matching_array_to_array_pattern()
 
     public static function positiveMatchData()
     {
-        $simpleArr =  array(
+        $simpleArr = array(
             'users' => array(
                 array(
                     'firstName' => 'Norbert',
@@ -141,7 +141,7 @@ public static function positiveMatchData()
             6.66
         );
 
-        $simpleArrPattern =  array(
+        $simpleArrPattern = array(
             'users' => array(
                 array(
                     'firstName' => '@string@',
@@ -169,7 +169,7 @@ public static function positiveMatchData()
 
     public static function negativeMatchData()
     {
-        $simpleArr =  array(
+        $simpleArr = array(
             'users' => array(
                 array(
                     'firstName' => 'Norbert',
@@ -186,7 +186,7 @@ public static function negativeMatchData()
             6.66
         );
 
-        $simpleDiff =  array(
+        $simpleDiff = array(
             'users' => array(
                 array(
                     'firstName' => 'Norbert',
diff --git a/tests/Matcher/JsonMatcherTest.php b/tests/Matcher/JsonMatcherTest.php
index 68fcff4b..377592ef 100644
--- a/tests/Matcher/JsonMatcherTest.php
+++ b/tests/Matcher/JsonMatcherTest.php
@@ -161,6 +161,10 @@ public static function positiveMatches()
                 '{"null":null}',
                 '{"null":@null@}'
             ),
+            array(
+                '{"username":null,"some_data":"test"}',
+                '{"username":null, "some_data": @string@}'
+            ),
             array(
                 '{"null":null}',
                 '{"null":null}'
@@ -176,7 +180,7 @@ public static function positiveMatches()
             array(
                 '[{"name": "Norbert"},{"name":"Michał"},{"name":"Bob"},{"name":"Martin"}]',
                 '[{"name": "Norbert"},@...@]'
-            ),
+            )
         );
     }