diff --git a/application/Espo/Core/Record/HookManager.php b/application/Espo/Core/Record/HookManager.php
index c1bcee107d..9cb59a4160 100644
--- a/application/Espo/Core/Record/HookManager.php
+++ b/application/Espo/Core/Record/HookManager.php
@@ -31,11 +31,6 @@ namespace Espo\Core\Record;
 
 use Espo\ORM\Entity;
 
-use Espo\Core\Record\CreateParams;
-use Espo\Core\Record\ReadParams;
-use Espo\Core\Record\UpdateParams;
-use Espo\Core\Record\DeleteParams;
-
 use Espo\Core\Record\Hook\{
     Provider,
     Type,
diff --git a/tests/unit/Espo/Core/Record/HookManagerTest.php b/tests/unit/Espo/Core/Record/HookManagerTest.php
new file mode 100644
index 0000000000..11eff077e4
--- /dev/null
+++ b/tests/unit/Espo/Core/Record/HookManagerTest.php
@@ -0,0 +1,225 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2021 Yurii Kuznietsov, Taras Machyshyn, Oleksii Avramenko
+ * Website: https://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace tests\unit\Espo\Core\Record;
+
+use Espo\Core\{
+    Record\HookManager,
+    Record\Hook\Provider,
+    Record\Hook\ReadHook,
+    Record\Hook\CreateHook,
+    Record\Hook\UpdateHook,
+    Record\Hook\DeleteHook,
+    Record\Hook\LinkHook,
+    Record\Hook\Type,
+    Record\CreateParams,
+    Record\ReadParams,
+    Record\UpdateParams,
+    Record\DeleteParams,
+    InjectableFactory,
+    Utils\Metadata,
+};
+
+use Espo\ORM\Entity;
+
+use tests\unit\testClasses\Core\Record\Hooks\{
+    BeforeReadHook,
+    BeforeCreateHook,
+    BeforeUpdateHook,
+    BeforeDeleteHook,
+    BeforeLinkHook,
+    BeforeUnlinkHook,
+};
+
+class HookManagerTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     * @var InjectableFactory
+     */
+    private $injectableFactory;
+
+    /**
+     * @var Metadata
+     */
+    private $metadata;
+
+    /**
+     * @var Provider
+     */
+    private $provider;
+
+    /**
+     * @var HookManager
+     */
+    private $manager;
+
+    /**
+     * @var Entity
+     */
+    private $entity;
+
+    private $entityType = 'Test';
+
+    protected function setUp(): void
+    {
+        $this->injectableFactory = $this->createMock(InjectableFactory::class);
+        $this->metadata = $this->createMock(Metadata::class);
+
+        $this->provider = new Provider($this->metadata, $this->injectableFactory);
+
+        $this->manager = new HookManager($this->provider);
+
+        $this->entity = $this->createEntity($this->entityType);
+    }
+
+    public function testBeforeRead(): void
+    {
+        $hook = $this->createMock(BeforeReadHook::class);
+
+        $this->initHooks(Type::BEFORE_READ, [BeforeReadHook::class], [$hook]);
+
+        $params = ReadParams::create();
+
+        $hook
+            ->expects($this->once())
+            ->method('process')
+            ->with($this->entity, $params);
+
+        $this->manager->processBeforeRead($this->entity, $params);
+    }
+
+    public function testBeforeCreate(): void
+    {
+        $hook = $this->createMock(BeforeCreateHook::class);
+
+        $this->initHooks(Type::BEFORE_CREATE, [BeforeCreateHook::class], [$hook]);
+
+        $params = CreateParams::create();
+
+        $hook
+            ->expects($this->once())
+            ->method('process')
+            ->with($this->entity, $params);
+
+        $this->manager->processBeforeCreate($this->entity, $params);
+    }
+
+    public function testBeforeUpdate(): void
+    {
+        $hook = $this->createMock(BeforeUpdateHook::class);
+
+        $this->initHooks(Type::BEFORE_UPDATE, [BeforeUpdateHook::class], [$hook]);
+
+        $params = UpdateParams::create();
+
+        $hook
+            ->expects($this->once())
+            ->method('process')
+            ->with($this->entity, $params);
+
+        $this->manager->processBeforeUpdate($this->entity, $params);
+    }
+
+    public function testBeforeDelete(): void
+    {
+        $hook = $this->createMock(BeforeDeleteHook::class);
+
+        $this->initHooks(Type::BEFORE_DELETE, [BeforeDeleteHook::class], [$hook]);
+
+        $params = DeleteParams::create();
+
+        $hook
+            ->expects($this->once())
+            ->method('process')
+            ->with($this->entity, $params);
+
+        $this->manager->processBeforeDelete($this->entity, $params);
+    }
+
+    public function testBeforeLink(): void
+    {
+        $hook = $this->createMock(BeforeLinkHook::class);
+
+        $this->initHooks(Type::BEFORE_LINK, [BeforeLinkHook::class], [$hook]);
+
+        $link = 'test';
+
+        $hook
+            ->expects($this->once())
+            ->method('process')
+            ->with($this->entity, $link, $this->entity);
+
+        $this->manager->processBeforeLink($this->entity, $link, $this->entity);
+    }
+
+    public function testBeforeUnlink(): void
+    {
+        $hook = $this->createMock(BeforeUnlinkHook::class);
+
+        $this->initHooks(Type::BEFORE_UNLINK, [BeforeUnlinkHook::class], [$hook]);
+
+        $link = 'test';
+
+        $hook
+            ->expects($this->once())
+            ->method('process')
+            ->with($this->entity, $link, $this->entity);
+
+        $this->manager->processBeforeUnlink($this->entity, $link, $this->entity);
+    }
+
+    private function createEntity(string $entityType): Entity
+    {
+        $entity = $this->createMock(Entity::class);
+
+        $entity
+            ->expects($this->any())
+            ->method('getEntityType')
+            ->willReturn($entityType);
+
+        return $entity;
+    }
+
+    private function initHooks(string $type, array $hookClassNameList, array $hookList): void
+    {
+        $this->metadata
+            ->expects($this->any())
+            ->method('get')
+            ->with(['recordDefs', $this->entityType, $type . 'HookClassNameList'])
+            ->willReturn($hookClassNameList);
+
+        foreach ($hookClassNameList as $i => $className) {
+            $this->injectableFactory
+                ->expects($this->any())
+                ->method('create')
+                ->with($className)
+                ->willReturn($hookList[$i]);
+        }
+    }
+}
diff --git a/tests/unit/testClasses/Core/Record/Hooks/BeforeCreateHook.php b/tests/unit/testClasses/Core/Record/Hooks/BeforeCreateHook.php
new file mode 100644
index 0000000000..0f0e56b9d1
--- /dev/null
+++ b/tests/unit/testClasses/Core/Record/Hooks/BeforeCreateHook.php
@@ -0,0 +1,41 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2021 Yurii Kuznietsov, Taras Machyshyn, Oleksii Avramenko
+ * Website: https://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace tests\unit\testClasses\Core\Record\Hooks;
+
+use Espo\Core\Record\Hook\CreateHook;
+use Espo\Core\Record\CreateParams;
+
+use Espo\ORM\Entity;
+
+class BeforeCreateHook implements CreateHook
+{
+    public function process(Entity $entity, CreateParams $params): void
+    {}
+}
diff --git a/tests/unit/testClasses/Core/Record/Hooks/BeforeDeleteHook.php b/tests/unit/testClasses/Core/Record/Hooks/BeforeDeleteHook.php
new file mode 100644
index 0000000000..e848434755
--- /dev/null
+++ b/tests/unit/testClasses/Core/Record/Hooks/BeforeDeleteHook.php
@@ -0,0 +1,41 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2021 Yurii Kuznietsov, Taras Machyshyn, Oleksii Avramenko
+ * Website: https://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace tests\unit\testClasses\Core\Record\Hooks;
+
+use Espo\Core\Record\Hook\DeleteHook;
+use Espo\Core\Record\DeleteParams;
+
+use Espo\ORM\Entity;
+
+class BeforeDeleteHook implements DeleteHook
+{
+    public function process(Entity $entity, DeleteParams $params): void
+    {}
+}
diff --git a/tests/unit/testClasses/Core/Record/Hooks/BeforeLinkHook.php b/tests/unit/testClasses/Core/Record/Hooks/BeforeLinkHook.php
new file mode 100644
index 0000000000..050f5f25e8
--- /dev/null
+++ b/tests/unit/testClasses/Core/Record/Hooks/BeforeLinkHook.php
@@ -0,0 +1,40 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2021 Yurii Kuznietsov, Taras Machyshyn, Oleksii Avramenko
+ * Website: https://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace tests\unit\testClasses\Core\Record\Hooks;
+
+use Espo\Core\Record\Hook\LinkHook;
+
+use Espo\ORM\Entity;
+
+class BeforeLinkHook implements LinkHook
+{
+    public function process(Entity $entity, string $link, Entity $foreignEntity): void
+    {}
+}
diff --git a/tests/unit/testClasses/Core/Record/Hooks/BeforeReadHook.php b/tests/unit/testClasses/Core/Record/Hooks/BeforeReadHook.php
new file mode 100644
index 0000000000..d9970801c9
--- /dev/null
+++ b/tests/unit/testClasses/Core/Record/Hooks/BeforeReadHook.php
@@ -0,0 +1,41 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2021 Yurii Kuznietsov, Taras Machyshyn, Oleksii Avramenko
+ * Website: https://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace tests\unit\testClasses\Core\Record\Hooks;
+
+use Espo\Core\Record\Hook\ReadHook;
+use Espo\Core\Record\ReadParams;
+
+use Espo\ORM\Entity;
+
+class BeforeReadHook implements ReadHook
+{
+    public function process(Entity $entity, ReadParams $params): void
+    {}
+}
diff --git a/tests/unit/testClasses/Core/Record/Hooks/BeforeUnlinkHook.php b/tests/unit/testClasses/Core/Record/Hooks/BeforeUnlinkHook.php
new file mode 100644
index 0000000000..4a5c756e6d
--- /dev/null
+++ b/tests/unit/testClasses/Core/Record/Hooks/BeforeUnlinkHook.php
@@ -0,0 +1,40 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2021 Yurii Kuznietsov, Taras Machyshyn, Oleksii Avramenko
+ * Website: https://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace tests\unit\testClasses\Core\Record\Hooks;
+
+use Espo\Core\Record\Hook\UnlinkHook;
+
+use Espo\ORM\Entity;
+
+class BeforeUnlinkHook implements UnlinkHook
+{
+    public function process(Entity $entity, string $link, Entity $foreignEntity): void
+    {}
+}
diff --git a/tests/unit/testClasses/Core/Record/Hooks/BeforeUpdateHook.php b/tests/unit/testClasses/Core/Record/Hooks/BeforeUpdateHook.php
new file mode 100644
index 0000000000..392bdb5d8f
--- /dev/null
+++ b/tests/unit/testClasses/Core/Record/Hooks/BeforeUpdateHook.php
@@ -0,0 +1,41 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2021 Yurii Kuznietsov, Taras Machyshyn, Oleksii Avramenko
+ * Website: https://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace tests\unit\testClasses\Core\Record\Hooks;
+
+use Espo\Core\Record\Hook\UpdateHook;
+use Espo\Core\Record\UpdateParams;
+
+use Espo\ORM\Entity;
+
+class BeforeUpdateHook implements UpdateHook
+{
+    public function process(Entity $entity, UpdateParams $params): void
+    {}
+}