diff --git a/src/Bot/HttpClient.php b/src/Bot/HttpClient.php
index a9ce032..491da2e 100644
--- a/src/Bot/HttpClient.php
+++ b/src/Bot/HttpClient.php
@@ -114,16 +114,22 @@ class HttpClient
      */
     public function makeRequest($path, $method, $request = null, $serializeTo = Serializer::S_JSON)
     {
+        $getParameters = '';
+
         $this->validateMethod($method);
 
         if (!is_null($request)) {
             $this->validateRequest($request);
         }
 
+        if ($method == self::METHOD_GET) {
+            $getParameters = Url::buildGetParameters(Serializer::serialize($request, Serializer::S_ARRAY));
+        }
+
         $parameters = is_null($request) ? null : Serializer::serialize($request, $serializeTo);
         $request = new Request(
             $method,
-            \sprintf("%s%s", $this->basePath, $path),
+            \sprintf("%s%s%s", $this->basePath, $path, $getParameters),
             [
                 'Content-Type' => 'application/json',
                 'X-Bot-Token' => $this->token
diff --git a/src/Bot/Model/Response/ListResponse.php b/src/Bot/Model/Response/ListResponse.php
index 6fabeea..488f03b 100644
--- a/src/Bot/Model/Response/ListResponse.php
+++ b/src/Bot/Model/Response/ListResponse.php
@@ -94,6 +94,16 @@ class ListResponse implements \Iterator, \ArrayAccess {
         return $this->errors;
     }
 
+    /**
+     * `count()` alternative for ListResponse
+     *
+     * @return int
+     */
+    public function count(): int
+    {
+        return count($this->items ?: []);
+    }
+
     /**
      * Set offset
      *
diff --git a/src/Url.php b/src/Url.php
index c5423f2..2d82cc9 100644
--- a/src/Url.php
+++ b/src/Url.php
@@ -47,4 +47,28 @@ class Url
 
         return $url;
     }
+
+    /**
+     * Convert request data to GET parameters
+     *
+     * @param array $params
+     *
+     * @return string
+     */
+    public static function buildGetParameters(array $params)
+    {
+        $result = '';
+
+        foreach ($params as $param => $value) {
+            if (!is_array($value)) {
+                $result .= '&' . $param . '=' . $value;
+            } else {
+                foreach ($value as $subvalue) {
+                    $result .= '&' . $param . '=' . $subvalue;
+                }
+            }
+        }
+
+        return count($result) > 0 ? '?' . substr($result, 1) : '';
+    }
 }
diff --git a/tests/Bot/Test/TestCase.php b/tests/Bot/Test/TestCase.php
index 027ae8f..1ede82c 100644
--- a/tests/Bot/Test/TestCase.php
+++ b/tests/Bot/Test/TestCase.php
@@ -16,6 +16,7 @@ namespace RetailCrm\Mg\Bot\Test;
 use PHPUnit\Framework\TestCase as BaseCase;
 use GuzzleHttp\Handler\MockHandler;
 use GuzzleHttp\HandlerStack;
+use GuzzleHttp\Psr7\Response;
 use RetailCrm\Mg\Bot\Client;
 
 /**
@@ -57,4 +58,71 @@ class TestCase extends BaseCase
             empty($response) ? null : HandlerStack::create($mock)
         );
     }
+
+    /**
+     * Returns mocked GuzzleHttp response
+     *
+     * @param string|null $body
+     * @param int $statusCode
+     *
+     * @return Response
+     */
+    public function getResponse(string $body = null, int $statusCode = 200)
+    {
+        return new Response(
+            $statusCode,
+            array_filter(
+                [
+                    'Server' => 'openresty/1.13.6.2',
+                    'Date' => gmdate("D, d M Y H:m:s \G\M\T"),
+                    'Content-Type' => 'application/json; charset=utf-8',
+                    'Content-Length' => is_null($body) ? null : strlen($body),
+                    'Connection' => 'keep-alive',
+                    'Access-Control-Allow-Credentials' => 'true',
+                    'Access-Control-Allow-Headers' => 'X-Requested-With, Content-Type, X-Api-Key, X-Client-Token',
+                    'Access-Control-Allow-Methods' => 'GET, POST, PUT, DELETE, OPTIONS'
+                ]
+            ),
+            $body
+        );
+    }
+
+    /**
+     * Generate and return mocked response.
+     * Response data should be stored in Resources directory as json file.
+     * Only file name (without extension or any other data) should be provided,
+     * e.g. `getJsonResponse('bots', 200)`
+     *
+     * @param string $jsonFile
+     * @param int $statusCode
+     *
+     * @return Response|null
+     */
+    public function getJsonResponse(string $jsonFile, int $statusCode = 200)
+    {
+        $fileName = realpath(join(DIRECTORY_SEPARATOR, [__DIR__, '..', '..', 'Resources', "${jsonFile}.json"]));
+
+        if (file_exists($fileName)) {
+            $json = file_get_contents($fileName);
+            json_decode($json, true);
+
+            if (json_last_error() == JSON_ERROR_NONE) {
+                return $this->getResponse($json, $statusCode);
+            }
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * Generate and return empty response
+     *
+     * @param int $statusCode
+     *
+     * @return Response|null
+     */
+    public function getEmptyResponse(int $statusCode = 200)
+    {
+        return $this->getResponse(null, $statusCode);
+    }
 }
diff --git a/tests/Bot/Tests/ClientListTest.php b/tests/Bot/Tests/ClientListTest.php
index f498e7c..f31604d 100644
--- a/tests/Bot/Tests/ClientListTest.php
+++ b/tests/Bot/Tests/ClientListTest.php
@@ -14,7 +14,11 @@
 namespace RetailCrm\Mg\Bot\Tests;
 
 use RetailCrm\Mg\Bot\Model\Constants;
+use RetailCrm\Mg\Bot\Model\Entity\Channel;
+use RetailCrm\Mg\Bot\Model\Entity\Chat\Chat;
+use RetailCrm\Mg\Bot\Model\Entity\Chat\ChatMember;
 use RetailCrm\Mg\Bot\Model\Entity\Dialog;
+use RetailCrm\Mg\Bot\Model\Entity\Message\Message;
 use RetailCrm\Mg\Bot\Model\Request;
 use RetailCrm\Mg\Bot\Model\Response;
 use RetailCrm\Mg\Bot\Test\TestCase;
@@ -38,15 +42,21 @@ class ClientListTest extends TestCase
      */
     public function testChannels()
     {
-        $client = self::getApiClient();
+        $client = self::getApiClient(
+            null,
+            null,
+            false,
+            $this->getJsonResponse('channels')
+        );
 
         $request = new Request\ChannelsRequest();
         $request->setActive(true);
-        $request->setTypes([Constants::CHANNEL_TYPE_FACEBOOK, Constants::CHANNEL_TYPE_INSTAGRAM]);
+        $request->setTypes([Constants::CHANNEL_TYPE_TELEGRAM, Constants::CHANNEL_TYPE_INSTAGRAM]);
 
         $response = $client->channels($request);
 
-        print_r($response->get(0));
+        static::assertEquals(4, $response->count(), "Incorrect channels count");
+        static::assertTrue($response[0] instanceof Channel\Channel, "Incorrect channel instance");
     }
 
     /**
@@ -55,14 +65,20 @@ class ClientListTest extends TestCase
      */
     public function testChats()
     {
-        $client = self::getApiClient();
+        $client = self::getApiClient(
+            null,
+            null,
+            false,
+            $this->getJsonResponse('chats')
+        );
 
         $request = new Request\ChatsRequest();
-        $request->setChannelType(Constants::CHANNEL_TYPE_FACEBOOK);
+        $request->setChannelType(Constants::CHANNEL_TYPE_TELEGRAM);
 
         $response = $client->chats($request);
 
-        print_r($response);
+        static::assertEquals(2, $response->count(), "Incorrect chats count");
+        static::assertTrue($response[0] instanceof Chat, "Incorrect chat instance");
     }
 
     /**
@@ -71,13 +87,18 @@ class ClientListTest extends TestCase
      */
     public function testMembers()
     {
-        $client = self::getApiClient();
+        $client = self::getApiClient(
+            null,
+            null,
+            false,
+            $this->getJsonResponse('members')
+        );
 
         $request = new Request\MembersRequest();
-
         $response = $client->members($request);
 
-        print_r($response);
+        static::assertEquals(4, $response->count(), "Incorrect members count");
+        static::assertTrue($response[0] instanceof ChatMember, "Incorrect member instance");
     }
 
     /**
@@ -86,7 +107,12 @@ class ClientListTest extends TestCase
      */
     public function testMessages()
     {
-        $client = self::getApiClient();
+        $client = self::getApiClient(
+            null,
+            null,
+            false,
+            $this->getJsonResponse('messages')
+        );
 
         $request = new Request\MessagesRequest();
         $request->setChannelType(Constants::CHANNEL_TYPE_INSTAGRAM);
@@ -94,7 +120,8 @@ class ClientListTest extends TestCase
 
         $response = $client->messages($request);
 
-        print_r($response);
+        static::assertEquals(2, $response->count(), "Incorrect message count");
+        static::assertTrue($response[0] instanceof Message, "Incorrect message instance");
     }
 
     /**
@@ -103,13 +130,17 @@ class ClientListTest extends TestCase
      */
     public function testCommands()
     {
-        $client = self::getApiClient();
+        $client = self::getApiClient(
+            null,
+            null,
+            false,
+            $this->getResponse('[]')
+        );
 
         $request = new Request\CommandsRequest();
-
         $response = $client->commands($request);
 
-        print_r($response);
+        self::assertEquals(0, $response->count(), "Invalid commands count");
     }
 
     /**
@@ -118,7 +149,12 @@ class ClientListTest extends TestCase
      */
     public function testBots()
     {
-        $client = self::getApiClient();
+        $client = self::getApiClient(
+            null,
+            null,
+            false,
+            $this->getJsonResponse('bots')
+        );
 
         $request = new Request\BotsRequest();
         $request->setActive(1);
@@ -126,7 +162,7 @@ class ClientListTest extends TestCase
 
         $data = $client->bots($request);
 
-        print_r($data[0]);
+        static::assertEquals(3, $data->count());
     }
 
     /**
diff --git a/tests/Resources/bots.json b/tests/Resources/bots.json
new file mode 100644
index 0000000..728f667
--- /dev/null
+++ b/tests/Resources/bots.json
@@ -0,0 +1,46 @@
+[
+  {
+    "id": 9,
+    "name": "Помощник",
+    "events": null,
+    "client_id": "identifier_1",
+    "avatar_url": "https://s3-s1.retailcrm.tech/eu-central-1/retailcrm-billing/images/5b927ad342366-bot-logo.svg",
+    "roles": null,
+    "created_at": "2018-09-13T07:38:02.988438Z",
+    "updated_at": "2019-06-13T12:56:36.346811Z",
+    "deactivated_at": null,
+    "is_active": true,
+    "is_self": true,
+    "is_system": false
+  },
+  {
+    "id": 7,
+    "name": "Helper",
+    "events": null,
+    "client_id": "identifier_2",
+    "avatar_url": "https://test.te/static/logo.svg",
+    "roles": null,
+    "created_at": "2018-09-07T07:27:41.87424Z",
+    "updated_at": "2018-10-25T07:43:03.077956Z",
+    "deactivated_at": "2019-10-25T07:43:03.077956Z",
+    "is_active": false,
+    "is_self": false,
+    "is_system": false
+  },
+  {
+    "id": 6,
+    "name": "Mira chat bot",
+    "events": null,
+    "client_id": "identifier_3",
+    "avatar_url": "https://s3.retailcrm.pro/eu-central-1/retailcrm-billing/images/5b97bfd983d2b-bot-logo-2.svg",
+    "roles": [
+      "responsible"
+    ],
+    "created_at": "2018-09-06T13:40:02.956515Z",
+    "updated_at": "2018-09-12T06:15:32.858632Z",
+    "deactivated_at": null,
+    "is_active": true,
+    "is_self": false,
+    "is_system": false
+  }
+]
\ No newline at end of file
diff --git a/tests/Resources/channels.json b/tests/Resources/channels.json
new file mode 100644
index 0000000..c47ec97
--- /dev/null
+++ b/tests/Resources/channels.json
@@ -0,0 +1,178 @@
+[
+  {
+    "id": 72,
+    "type": "telegram",
+    "name": "@testbot",
+    "settings": {
+      "status": {
+        "delivered": "send"
+      },
+      "text": {
+        "creating": "both",
+        "editing": "both",
+        "quoting": "both",
+        "deleting": "receive",
+        "max_chars_count": 4096
+      },
+      "product": {
+        "creating": "receive",
+        "editing": "receive"
+      },
+      "order": {
+        "creating": "receive",
+        "editing": "receive"
+      },
+      "image": {
+        "creating": "both",
+        "editing": "both",
+        "quoting": "both",
+        "deleting": "receive",
+        "max_items_count": 10
+      },
+      "file": {
+        "creating": "both",
+        "editing": "both",
+        "quoting": "both",
+        "deleting": "receive",
+        "max_items_count": 1
+      }
+    },
+    "created_at": "2019-06-11T12:46:48.72241Z",
+    "updated_at": "2019-06-11T12:46:48.72241Z",
+    "activated_at": "2019-06-11T12:46:48.722086Z",
+    "deactivated_at": null,
+    "is_active": true
+  },
+  {
+    "id": 71,
+    "type": "telegram",
+    "name": "@testbot",
+    "settings": {
+      "status": {
+        "delivered": "send"
+      },
+      "text": {
+        "creating": "both",
+        "editing": "both",
+        "quoting": "both",
+        "deleting": "receive",
+        "max_chars_count": 4096
+      },
+      "product": {
+        "creating": "receive",
+        "editing": "receive"
+      },
+      "order": {
+        "creating": "receive",
+        "editing": "receive"
+      },
+      "image": {
+        "creating": "both",
+        "editing": "both",
+        "quoting": "both",
+        "deleting": "receive",
+        "max_items_count": 10
+      },
+      "file": {
+        "creating": "both",
+        "editing": "both",
+        "quoting": "both",
+        "deleting": "receive",
+        "max_items_count": 1
+      }
+    },
+    "created_at": "2019-06-11T12:41:44.660495Z",
+    "updated_at": "2019-06-11T12:46:42.094353Z",
+    "activated_at": "2019-06-11T12:41:44.660204Z",
+    "deactivated_at": "2019-06-11T12:46:42.094135Z",
+    "is_active": true
+  },
+  {
+    "id": 70,
+    "type": "telegram",
+    "name": "@testbot",
+    "settings": {
+      "status": {
+        "delivered": "send"
+      },
+      "text": {
+        "creating": "both",
+        "editing": "both",
+        "quoting": "both",
+        "deleting": "receive",
+        "max_chars_count": 4096
+      },
+      "product": {
+        "creating": "receive",
+        "editing": "receive"
+      },
+      "order": {
+        "creating": "receive",
+        "editing": "receive"
+      },
+      "image": {
+        "creating": "both",
+        "editing": "both",
+        "quoting": "both",
+        "deleting": "receive",
+        "max_items_count": 10
+      },
+      "file": {
+        "creating": "both",
+        "editing": "both",
+        "quoting": "both",
+        "deleting": "receive",
+        "max_items_count": 1
+      }
+    },
+    "created_at": "2019-06-11T12:38:24.322413Z",
+    "updated_at": "2019-06-11T12:41:42.335889Z",
+    "activated_at": "2019-06-11T12:38:24.322125Z",
+    "deactivated_at": "2019-06-11T12:41:42.335678Z",
+    "is_active": true
+  },
+  {
+    "id": 69,
+    "type": "telegram",
+    "name": "@testbot",
+    "settings": {
+      "status": {
+        "delivered": "send"
+      },
+      "text": {
+        "creating": "both",
+        "editing": "both",
+        "quoting": "both",
+        "deleting": "receive",
+        "max_chars_count": 4096
+      },
+      "product": {
+        "creating": "receive",
+        "editing": "receive"
+      },
+      "order": {
+        "creating": "receive",
+        "editing": "receive"
+      },
+      "image": {
+        "creating": "both",
+        "editing": "both",
+        "quoting": "both",
+        "deleting": "receive",
+        "max_items_count": 10
+      },
+      "file": {
+        "creating": "both",
+        "editing": "both",
+        "quoting": "both",
+        "deleting": "receive",
+        "max_items_count": 1
+      }
+    },
+    "created_at": "2019-06-11T12:33:08.676214Z",
+    "updated_at": "2019-06-11T12:38:19.615651Z",
+    "activated_at": "2019-06-11T12:33:08.676043Z",
+    "deactivated_at": "2019-06-11T12:38:19.615335Z",
+    "is_active": true
+  }
+]
\ No newline at end of file
diff --git a/tests/Resources/chats.json b/tests/Resources/chats.json
new file mode 100644
index 0000000..1bd6785
--- /dev/null
+++ b/tests/Resources/chats.json
@@ -0,0 +1,116 @@
+[
+  {
+    "id": 30,
+    "avatar": "",
+    "name": "",
+    "channel": {
+      "id": 72,
+      "avatar": "",
+      "transport_id": 4,
+      "type": "fbmessenger",
+      "settings": {
+        "status": {
+          "delivered": "send"
+        },
+        "text": {
+          "creating": "both",
+          "editing": "both",
+          "quoting": "both",
+          "deleting": "receive",
+          "max_chars_count": 4096
+        },
+        "product": {
+          "creating": "receive",
+          "editing": "receive"
+        },
+        "order": {
+          "creating": "receive",
+          "editing": "receive"
+        },
+        "image": {
+          "creating": "both",
+          "editing": "both",
+          "quoting": "both",
+          "deleting": "receive",
+          "max_items_count": 10
+        },
+        "file": {
+          "creating": "both",
+          "editing": "both",
+          "quoting": "both",
+          "deleting": "receive",
+          "max_items_count": 1
+        }
+      },
+      "name": "testbot",
+      "is_active": true
+    },
+    "members": null,
+    "customer": {
+      "id": 39,
+      "type": "customer",
+      "avatar": "",
+      "name": "Иван",
+      "username": "Иван",
+      "first_name": "Иван"
+    },
+    "author_id": 0,
+    "last_message": null,
+    "last_activity": "2019-06-11T17:36:20+03:00",
+    "created_at": "2019-06-11T12:49:26.938879Z",
+    "updated_at": "2019-06-14T14:40:28.7111Z"
+  },
+  {
+    "id": 29,
+    "avatar": "",
+    "name": "",
+    "channel": {
+      "id": 68,
+      "avatar": "",
+      "transport_id": 5,
+      "type": "fbmessenger",
+      "settings": {
+        "status": {
+          "delivered": "send",
+          "read": "send"
+        },
+        "text": {
+          "creating": "both",
+          "quoting": "receive",
+          "max_chars_count": 2000
+        },
+        "product": {
+          "creating": "receive"
+        },
+        "order": {
+          "creating": "receive"
+        },
+        "image": {
+          "creating": "both",
+          "max_items_count": 10
+        },
+        "file": {
+          "creating": "both",
+          "max_items_count": 10
+        }
+      },
+      "name": "testbot",
+      "is_active": false
+    },
+    "members": null,
+    "customer": {
+      "id": 38,
+      "type": "customer",
+      "avatar": "",
+      "name": "Пётр Петрович",
+      "username": "Пётр",
+      "first_name": "Пётр",
+      "last_name": "Петрович"
+    },
+    "author_id": 0,
+    "last_message": null,
+    "last_activity": "2019-06-13T11:07:14+03:00",
+    "created_at": "2019-06-11T07:34:16.082957Z",
+    "updated_at": "2019-06-16T08:10:28.657972Z"
+  }
+]
\ No newline at end of file
diff --git a/tests/Resources/members.json b/tests/Resources/members.json
new file mode 100644
index 0000000..e3f8672
--- /dev/null
+++ b/tests/Resources/members.json
@@ -0,0 +1,38 @@
+[
+  {
+    "id": 50,
+    "created_at": "2019-06-11T12:49:34.718596Z",
+    "updated_at": "2019-06-11T14:36:22.086823Z",
+    "is_author": false,
+    "state": "active",
+    "chat_id": 30,
+    "user_id": 12
+  },
+  {
+    "id": 49,
+    "created_at": "2019-06-11T12:49:26.967903Z",
+    "updated_at": "2019-06-11T12:49:34.723983Z",
+    "is_author": false,
+    "state": "kicked",
+    "chat_id": 30,
+    "user_id": 4
+  },
+  {
+    "id": 48,
+    "created_at": "2019-06-11T08:40:14.139024Z",
+    "updated_at": "2019-06-13T08:10:03.576754Z",
+    "is_author": false,
+    "state": "active",
+    "chat_id": 29,
+    "user_id": 12
+  },
+  {
+    "id": 47,
+    "created_at": "2019-06-11T07:34:16.117109Z",
+    "updated_at": "2019-06-11T08:40:14.145243Z",
+    "is_author": false,
+    "state": "kicked",
+    "chat_id": 29,
+    "user_id": 4
+  }
+]
\ No newline at end of file
diff --git a/tests/Resources/messages.json b/tests/Resources/messages.json
new file mode 100644
index 0000000..dcd9b55
--- /dev/null
+++ b/tests/Resources/messages.json
@@ -0,0 +1,48 @@
+[
+  {
+    "id": 3376,
+    "time": "2019-05-20T17:17:28+03:00",
+    "type": "text",
+    "scope": "public",
+    "chat_id": 26,
+    "is_read": false,
+    "is_edit": false,
+    "status": "seen",
+    "from": {
+      "id": 35,
+      "type": "customer",
+      "avatar": "",
+      "name": "Иванов Иван",
+      "username": "username",
+      "first_name": "Иванов Иван"
+    },
+    "content": "Text",
+    "quote": null,
+    "channel_id": 61,
+    "created_at": "2019-05-20T14:17:28.025314Z",
+    "updated_at": "2019-05-20T14:20:57.05964Z"
+  },
+  {
+    "id": 3373,
+    "time": "2019-05-20T15:24:52+03:00",
+    "type": "text",
+    "scope": "public",
+    "chat_id": 26,
+    "is_read": false,
+    "is_edit": false,
+    "status": "seen",
+    "from": {
+      "id": 35,
+      "type": "customer",
+      "avatar": "",
+      "name": "Иванов Иван",
+      "username": "username",
+      "first_name": "Иванов Иван"
+    },
+    "content": "❤️",
+    "quote": null,
+    "channel_id": 61,
+    "created_at": "2019-05-20T12:24:52.478633Z",
+    "updated_at": "2019-05-20T12:24:52.585284Z"
+  }
+]
\ No newline at end of file