diff --git a/api/tests/_bootstrap.php b/api/tests/_bootstrap.php
index f962cb8..d49e5bf 100644
--- a/api/tests/_bootstrap.php
+++ b/api/tests/_bootstrap.php
@@ -1,10 +1,6 @@
 <?php
-
-Codeception\PHPUnit\Init::init();
-
 defined('YII_DEBUG') || define('YII_DEBUG', true);
 defined('YII_ENV') || define('YII_ENV', 'test');
-
 defined('YII_APP_BASE_PATH') || define('YII_APP_BASE_PATH', __DIR__ . '/../../');
 
 require_once YII_APP_BASE_PATH . '/vendor/autoload.php';
diff --git a/api/tests/unit/components/ReCaptcha/ValidatorTest.php b/api/tests/unit/components/ReCaptcha/ValidatorTest.php
index c19c770..7a60736 100644
--- a/api/tests/unit/components/ReCaptcha/ValidatorTest.php
+++ b/api/tests/unit/components/ReCaptcha/ValidatorTest.php
@@ -8,8 +8,6 @@ use api\tests\unit\TestCase;
 use GuzzleHttp\ClientInterface;
 use GuzzleHttp\Exception\ConnectException;
 use GuzzleHttp\Psr7\Response;
-use phpmock\mockery\PHPMockery;
-use ReflectionClass;
 
 class ValidatorTest extends TestCase {
 
@@ -44,7 +42,7 @@ class ValidatorTest extends TestCase {
                 ],
             ])))
         );
-        PHPMockery::mock($this->getClassNamespace(Validator::class), 'sleep')->once();
+        $this->getFunctionMock(Validator::class, 'sleep')->expects($this->once());
 
         $validator = new Validator($mockClient);
         $this->assertTrue($validator->validate('12341234', $error));
@@ -54,7 +52,7 @@ class ValidatorTest extends TestCase {
     public function testValidateWithHugeNetworkTroubles() {
         $mockClient = $this->createMock(ClientInterface::class);
         $mockClient->expects($this->exactly(3))->method('request')->willThrowException($this->createMock(ConnectException::class));
-        PHPMockery::mock($this->getClassNamespace(Validator::class), 'sleep')->times(2);
+        $this->getFunctionMock(Validator::class, 'sleep')->expects($this->exactly(2));
 
         $validator = new Validator($mockClient);
         $this->expectException(ConnectException::class);
@@ -71,8 +69,4 @@ class ValidatorTest extends TestCase {
         $this->assertNull($error);
     }
 
-    private function getClassNamespace(string $className): string {
-        return (new ReflectionClass($className))->getNamespaceName();
-    }
-
 }
diff --git a/composer.json b/composer.json
index c5e1ba9..3a3a3cf 100644
--- a/composer.json
+++ b/composer.json
@@ -4,6 +4,9 @@
     "homepage": "https://account.ely.by",
     "type": "project",
     "minimum-stability": "stable",
+    "config": {
+        "sort-packages": true
+    },
     "require": {
         "php": "^7.3",
         "ext-intl": "*",
@@ -36,6 +39,7 @@
     "require-dev": {
         "codeception/base": "^3.1.0",
         "codeception/specify": "^1.0.0",
+        "cweagans/composer-patches": "^1.6",
         "ely/php-code-style": "^0.3.0",
         "flow/jsonpath": "^0.4.0",
         "fzaninotto/faker": "^1.8",
@@ -51,6 +55,13 @@
         "symfony/polyfill-php72": "*",
         "symfony/polyfill-php73": "*"
     },
+    "extra": {
+        "patches": {
+            "codeception/base": {
+                "Fix Codeception compatibility with PHPUnit8": "patches/codeception-phpunit-8-fix.patch"
+            }
+        }
+    },
     "repositories": [
         {
             "type": "composer",
@@ -61,9 +72,6 @@
             "url": "https://github.com/elyby/oauth2-server.git"
         }
     ],
-    "config": {
-        "sort-packages": true
-    },
     "autoload": {
         "psr-4": {
             "api\\": "api",
diff --git a/composer.lock b/composer.lock
index 160405d..624f322 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "d79b05dfd2bb6a2e053eaf534d42622e",
+    "content-hash": "0a56121050b75bd49d4d924464422c39",
     "packages": [
         {
             "name": "bacon/bacon-qr-code",
@@ -3023,7 +3023,10 @@
             ],
             "type": "library",
             "extra": {
-                "branch-alias": []
+                "branch-alias": [],
+                "patches_applied": {
+                    "Fix Codeception compatibility with PHPUnit8": "patches/codeception-phpunit-8-fix.patch"
+                }
             },
             "autoload": {
                 "psr-4": {
@@ -3271,6 +3274,50 @@
             ],
             "time": "2019-01-28T20:25:53+00:00"
         },
+        {
+            "name": "cweagans/composer-patches",
+            "version": "1.6.7",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/cweagans/composer-patches.git",
+                "reference": "2e6f72a2ad8d59cd7e2b729f218bf42adb14f590"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/cweagans/composer-patches/zipball/2e6f72a2ad8d59cd7e2b729f218bf42adb14f590",
+                "reference": "2e6f72a2ad8d59cd7e2b729f218bf42adb14f590",
+                "shasum": ""
+            },
+            "require": {
+                "composer-plugin-api": "^1.0",
+                "php": ">=5.3.0"
+            },
+            "require-dev": {
+                "composer/composer": "~1.0",
+                "phpunit/phpunit": "~4.6"
+            },
+            "type": "composer-plugin",
+            "extra": {
+                "class": "cweagans\\Composer\\Patches"
+            },
+            "autoload": {
+                "psr-4": {
+                    "cweagans\\Composer\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Cameron Eagans",
+                    "email": "me@cweagans.net"
+                }
+            ],
+            "description": "Provides a way to patch Composer packages.",
+            "time": "2019-08-29T20:11:49+00:00"
+        },
         {
             "name": "doctrine/instantiator",
             "version": "1.3.0",
diff --git a/console/tests/_bootstrap.php b/console/tests/_bootstrap.php
index e919416..d49e5bf 100644
--- a/console/tests/_bootstrap.php
+++ b/console/tests/_bootstrap.php
@@ -1,7 +1,6 @@
 <?php
 defined('YII_DEBUG') || define('YII_DEBUG', true);
 defined('YII_ENV') || define('YII_ENV', 'test');
-
 defined('YII_APP_BASE_PATH') || define('YII_APP_BASE_PATH', __DIR__ . '/../../');
 
 require_once YII_APP_BASE_PATH . '/vendor/autoload.php';
diff --git a/patches/codeception-phpunit-8-fix.patch b/patches/codeception-phpunit-8-fix.patch
new file mode 100644
index 0000000..a28d720
--- /dev/null
+++ b/patches/codeception-phpunit-8-fix.patch
@@ -0,0 +1,26 @@
+diff --git a/src/Codeception/Test/Cest.php b/src/Codeception/Test/Cest.php
+index c644ed2e..5426bf3f 100644
+--- a/src/Codeception/Test/Cest.php
++++ b/src/Codeception/Test/Cest.php
+@@ -150,7 +150,7 @@ protected function executeTestMethod($I)
+         $this->invoke($this->testMethod, [$I, $this->scenario]);
+     }
+ 
+-    public function toString()
++    public function toString(): string
+     {
+         return sprintf('%s: %s', ReflectionHelper::getClassShortName($this->getTestClass()), Message::ucfirst($this->getFeature()));
+     }
+diff --git a/src/Codeception/Test/Test.php b/src/Codeception/Test/Test.php
+index f5e8426f..99c9f0ae 100644
+--- a/src/Codeception/Test/Test.php
++++ b/src/Codeception/Test/Test.php
+@@ -55,7 +55,7 @@ abstract class Test implements TestInterface, Interfaces\Descriptive
+      *
+      * @return mixed
+      */
+-    abstract public function toString();
++    abstract public function toString(): string;
+ 
+     /**
+      * Runs a test and collects its result in a TestResult instance.