diff --git a/.gitignore b/.gitignore
index 0e22d4b..c7050eb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,8 @@
 /bin
 composer.lock
 composer.phar
+coverage.xml
+test-report.xml
 phpunit.xml
 .idea
 .DS_Store
diff --git a/lib/RetailCrm/Client/AbstractLoader.php b/lib/RetailCrm/Client/AbstractLoader.php
index c9c2905..c021a1a 100755
--- a/lib/RetailCrm/Client/AbstractLoader.php
+++ b/lib/RetailCrm/Client/AbstractLoader.php
@@ -29,8 +29,13 @@ use RetailCrm\Http\Client;
  */
 abstract class AbstractLoader
 {
+    /** @var string|null */
     protected $siteCode;
+
+    /** @var \RetailCrm\Http\Client */
     protected $client;
+
+    /** @var string */
     protected $crmUrl;
 
     /**
diff --git a/lib/RetailCrm/Http/Client.php b/lib/RetailCrm/Http/Client.php
index 3bb043e..f0c2840 100755
--- a/lib/RetailCrm/Http/Client.php
+++ b/lib/RetailCrm/Http/Client.php
@@ -75,7 +75,7 @@ class Client
      *
      * @return ApiResponse
      */
-    public function makeRequest(
+    public function makeRawRequest(
         $path,
         $method,
         array $parameters = [],
@@ -119,7 +119,7 @@ class Client
             curl_setopt($curlHandler, CURLOPT_POST, true);
 
             if ('/files/upload' == $path) {
-                curl_setopt($curlHandler, CURLOPT_POSTFIELDS, $parameters['file']);
+                curl_setopt($curlHandler, CURLOPT_POSTFIELDS, file_get_contents($parameters['file']));
             } else {
                 curl_setopt($curlHandler, CURLOPT_POSTFIELDS, $parameters);
             }
@@ -143,4 +143,29 @@ class Client
 
         return new ApiResponse($statusCode, $responseBody);
     }
+
+    /**
+     * Make HTTP request and deserialize JSON body (throws exception otherwise)
+     *
+     * @param string $path       request url
+     * @param string $method     (default: 'GET')
+     * @param array  $parameters (default: array())
+     * @param bool   $fullPath   (default: false)
+     *
+     * @SuppressWarnings(PHPMD.ExcessiveParameterList)
+     *
+     * @throws \InvalidArgumentException
+     * @throws CurlException
+     * @throws InvalidJsonException
+     *
+     * @return ApiResponse
+     */
+    public function makeRequest(
+        $path,
+        $method,
+        array $parameters = [],
+        $fullPath = false
+    ) {
+        return $this->makeRawRequest($path, $method, $parameters, $fullPath)->asJsonResponse();
+    }
 }
diff --git a/lib/RetailCrm/Methods/V5/Files.php b/lib/RetailCrm/Methods/V5/Files.php
index b891f74..bc711ec 100644
--- a/lib/RetailCrm/Methods/V5/Files.php
+++ b/lib/RetailCrm/Methods/V5/Files.php
@@ -150,7 +150,7 @@ trait Files
     public function fileDownload($id)
     {
         /* @noinspection PhpUndefinedMethodInspection */
-        return $this->client->makeRequest(
+        return $this->client->makeRawRequest(
             sprintf('/files/%s/download', $id),
             "GET"
         );
diff --git a/lib/RetailCrm/Response/ApiResponse.php b/lib/RetailCrm/Response/ApiResponse.php
index f5e6efa..34e6118 100644
--- a/lib/RetailCrm/Response/ApiResponse.php
+++ b/lib/RetailCrm/Response/ApiResponse.php
@@ -51,9 +51,17 @@ class ApiResponse implements \ArrayAccess
     {
         $this->statusCode = (int) $statusCode;
         $this->rawResponse = $responseBody;
+    }
 
-        if (!empty($responseBody)) {
-            $response = json_decode($responseBody, true);
+    /**
+     * Deserialize JSON from raw response body
+     *
+     * @return $this
+     */
+    public function asJsonResponse()
+    {
+        if (!empty($this->rawResponse)) {
+            $response = json_decode($this->rawResponse, true);
 
             if (!$response && JSON_ERROR_NONE !== ($error = json_last_error())) {
                 throw new InvalidJsonException(
@@ -64,6 +72,8 @@ class ApiResponse implements \ArrayAccess
 
             $this->response = $response;
         }
+
+        return $this;
     }
 
     /**
diff --git a/tests/RetailCrm/Tests/Http/ClientTest.php b/tests/RetailCrm/Tests/Http/ClientTest.php
index 5caa9f1..dd68d82 100644
--- a/tests/RetailCrm/Tests/Http/ClientTest.php
+++ b/tests/RetailCrm/Tests/Http/ClientTest.php
@@ -93,6 +93,22 @@ class ClientTest extends TestCase
         $response = $client->makeRequest('/orders', Client::METHOD_GET);
 
         static::assertInstanceOf('RetailCrm\Response\ApiResponse', $response);
+        static::assertNotEmpty($response->getResponseBody());
+        static::assertNotEmpty($response->getResponse());
+        static::assertEquals(200, $response->getStatusCode());
+    }
+
+    /**
+     * @group client
+     */
+    public function testRequestSuccessNoDeserialization()
+    {
+        $client = static::getClient();
+        $response = $client->makeRawRequest('/orders', Client::METHOD_GET);
+
+        static::assertInstanceOf('RetailCrm\Response\ApiResponse', $response);
+        static::assertNotEmpty($response->getResponseBody());
+        static::assertEmpty($response->getResponse());
         static::assertEquals(200, $response->getStatusCode());
     }
 }
diff --git a/tests/RetailCrm/Tests/Methods/Version5/ApiClientCustomersCorporateTest.php b/tests/RetailCrm/Tests/Methods/Version5/ApiClientCustomersCorporateTest.php
index 0587fd7..26bf263 100644
--- a/tests/RetailCrm/Tests/Methods/Version5/ApiClientCustomersCorporateTest.php
+++ b/tests/RetailCrm/Tests/Methods/Version5/ApiClientCustomersCorporateTest.php
@@ -308,7 +308,7 @@ class ApiClientCustomersCorporateTest extends TestCase
     {
         $client = static::getApiClient();
         $response = $client->request->customersCorporateAddresses($ids['externalId'], ['name' => 'name'], 1, 20);
-
+        
         static::assertInstanceOf('RetailCrm\Response\ApiResponse', $response);
         static::assertTrue(
             $response->isSuccessful(),
diff --git a/tests/RetailCrm/Tests/Response/ApiResponseTest.php b/tests/RetailCrm/Tests/Response/ApiResponseTest.php
index d4709bd..8a414f6 100644
--- a/tests/RetailCrm/Tests/Response/ApiResponseTest.php
+++ b/tests/RetailCrm/Tests/Response/ApiResponseTest.php
@@ -40,7 +40,7 @@ class ApiResponseTest extends TestCase
             'Response object created'
         );
 
-        $response = new ApiResponse(201, '{ "success": true }');
+        $response = (new ApiResponse(201, '{ "success": true }'))->asJsonResponse();
         static::assertInstanceOf(
             'RetailCrm\Response\ApiResponse',
             $response,
@@ -54,7 +54,20 @@ class ApiResponseTest extends TestCase
      */
     public function testJsonInvalid()
     {
-        new ApiResponse(400, '{ "asdf": }');
+        (new ApiResponse(400, '{ "asdf": }'))->asJsonResponse();
+    }
+
+    /**
+     * @group response
+     */
+    public function testJsonInvalidNoDeserialize()
+    {
+        $response = new ApiResponse(400, '{ "asdf": }');
+        static::assertInstanceOf(
+            'RetailCrm\Response\ApiResponse',
+            $response,
+            'Response object created'
+        );
     }
 
     /**
@@ -69,7 +82,7 @@ class ApiResponseTest extends TestCase
             'Response object returns the right status code'
         );
 
-        $response = new ApiResponse(460, '{ "success": false }');
+        $response = (new ApiResponse(460, '{ "success": false }'))->asJsonResponse();
         static::assertEquals(
             460,
             $response->getStatusCode(),
@@ -88,7 +101,7 @@ class ApiResponseTest extends TestCase
             'Request was successful'
         );
 
-        $response = new ApiResponse(460, '{ "success": false }');
+        $response = (new ApiResponse(460, '{ "success": false }'))->asJsonResponse();
         static::assertFalse(
             $response->isSuccessful(),
             'Request was failed'
@@ -100,7 +113,7 @@ class ApiResponseTest extends TestCase
      */
     public function testMagicCall()
     {
-        $response = new ApiResponse(201, '{ "success": true }');
+        $response = (new ApiResponse(201, '{ "success": true }'))->asJsonResponse();
         static::assertEquals(
             true,
             $response->isSuccessful(),
@@ -125,7 +138,7 @@ class ApiResponseTest extends TestCase
      */
     public function testMagicCallException2()
     {
-        $response = new ApiResponse(201, '{ "success": true }');
+        $response = (new ApiResponse(201, '{ "success": true }'))->asJsonResponse();
         /* @noinspection PhpUndefinedMethodInspection */
         $response->getSomeSuccess();
     }
@@ -135,7 +148,7 @@ class ApiResponseTest extends TestCase
      */
     public function testMagicGet()
     {
-        $response = new ApiResponse(201, '{ "success": true }');
+        $response = (new ApiResponse(201, '{ "success": true }'))->asJsonResponse();
         static::assertEquals(
             true,
             $response->success,
@@ -160,7 +173,7 @@ class ApiResponseTest extends TestCase
      */
     public function testMagicGetException2()
     {
-        $response = new ApiResponse(201, '{ "success": true }');
+        $response = (new ApiResponse(201, '{ "success": true }'))->asJsonResponse();
         /* @noinspection PhpUndefinedFieldInspection */
         $response->someSuccess;
     }
@@ -170,7 +183,7 @@ class ApiResponseTest extends TestCase
      */
     public function testArrayGet()
     {
-        $response = new ApiResponse(201, '{ "success": true }');
+        $response = (new ApiResponse(201, '{ "success": true }'))->asJsonResponse();
         static::assertEquals(
             true,
             $response['success'],
@@ -194,7 +207,7 @@ class ApiResponseTest extends TestCase
      */
     public function testArrayGetException2()
     {
-        $response = new ApiResponse(201, '{ "success": true }');
+        $response = (new ApiResponse(201, '{ "success": true }'))->asJsonResponse();
         $response['someSuccess'];
     }
 
@@ -203,7 +216,7 @@ class ApiResponseTest extends TestCase
      */
     public function testArrayIsset()
     {
-        $response = new ApiResponse(201, '{ "success": true }');
+        $response = (new ApiResponse(201, '{ "success": true }'))->asJsonResponse();
 
         static::assertTrue(
             isset($response['success']),
@@ -222,7 +235,7 @@ class ApiResponseTest extends TestCase
      */
     public function testArraySetException1()
     {
-        $response = new ApiResponse(201, '{ "success": true }');
+        $response = (new ApiResponse(201, '{ "success": true }'))->asJsonResponse();
         $response['success'] = 'a';
     }
 
@@ -232,7 +245,7 @@ class ApiResponseTest extends TestCase
      */
     public function testArraySetException2()
     {
-        $response = new ApiResponse(201, '{ "success": true }');
+        $response = (new ApiResponse(201, '{ "success": true }'))->asJsonResponse();
         $response['sssssssuccess'] = 'a';
     }
 
@@ -242,7 +255,7 @@ class ApiResponseTest extends TestCase
      */
     public function testArrayUnsetException1()
     {
-        $response = new ApiResponse(201, '{ "success": true }');
+        $response = (new ApiResponse(201, '{ "success": true }'))->asJsonResponse();
         unset($response['success']);
     }
 
@@ -252,7 +265,7 @@ class ApiResponseTest extends TestCase
      */
     public function testArrayUnsetException2()
     {
-        $response = new ApiResponse(201, '{ "success": true }');
+        $response = (new ApiResponse(201, '{ "success": true }'))->asJsonResponse();
         unset($response['sssssssuccess']);
     }
 
@@ -261,7 +274,7 @@ class ApiResponseTest extends TestCase
      */
     public function testMagicIsset()
     {
-        $response = new ApiResponse(201, '{ "success": true }');
+        $response = (new ApiResponse(201, '{ "success": true }'))->asJsonResponse();
 
         static::assertTrue(
             isset($response->success),