diff --git a/tests/Mock/BaseMock.php b/tests/Mock/BaseMock.php
index 3cc29621..297e63cf 100644
--- a/tests/Mock/BaseMock.php
+++ b/tests/Mock/BaseMock.php
@@ -6,6 +6,7 @@
 
 use MyParcelNL\Pdk\Base\Contract\Arrayable;
 use MyParcelNL\Pdk\Base\Support\Arr;
+use MyParcelNL\Pdk\Base\Support\Utils;
 use MyParcelNL\Sdk\src\Support\Str;
 
 class BaseMock implements Arrayable
@@ -120,7 +121,13 @@ public function setAttribute(string $key, $value): self
      */
     public function toArray(?int $flags = null): array
     {
-        return $this->attributes;
+        $attributes = $flags & Arrayable::SKIP_NULL ? Utils::filterNull($this->attributes) : $this->attributes;
+
+        return array_map(static function ($value) use ($flags) {
+            return $value instanceof Arrayable
+                ? $value->toArray($flags)
+                : $value;
+        }, $attributes);
     }
 
     /**
diff --git a/tests/Mock/MockPsObjectModel.php b/tests/Mock/MockPsObjectModel.php
index 41980bf9..bc672f53 100644
--- a/tests/Mock/MockPsObjectModel.php
+++ b/tests/Mock/MockPsObjectModel.php
@@ -4,6 +4,7 @@
 
 namespace MyParcelNL\PrestaShop\Tests\Mock;
 
+use MyParcelNL\Pdk\Base\Contract\Arrayable;
 use MyParcelNL\Pdk\Base\Support\Utils;
 use MyParcelNL\Sdk\src\Support\Str;
 use PrestaShop\PrestaShop\Core\Foundation\Database\EntityInterface;
@@ -35,7 +36,7 @@ public function __construct(?int $id = null, ?int $id_lang = null, ?int $id_shop
                 return;
             }
 
-            $this->hydrate($existing->toArray());
+            $this->hydrate($existing->toArray(Arrayable::SKIP_NULL));
         }
     }
 
diff --git a/tests/Unit/Pdk/Installer/Service/PsInstallerServiceTest.php b/tests/Unit/Pdk/Installer/Service/PsInstallerServiceTest.php
index ce2a7ac0..8bbfb782 100644
--- a/tests/Unit/Pdk/Installer/Service/PsInstallerServiceTest.php
+++ b/tests/Unit/Pdk/Installer/Service/PsInstallerServiceTest.php
@@ -7,11 +7,14 @@
 
 namespace MyParcelNL\PrestaShop\Pdk\Installer\Service;
 
+use Hook;
+use MyParcelNL\Pdk\Base\Contract\Arrayable;
+use MyParcelNL\Pdk\Base\Support\Collection;
 use MyParcelNL\Pdk\Facade\Installer;
 use MyParcelNL\Pdk\Facade\Pdk;
 use MyParcelNL\PrestaShop\Tests\Mock\MockPsDb;
+use MyParcelNL\PrestaShop\Tests\Mock\MockPsObjectModels;
 use MyParcelNL\PrestaShop\Tests\Uses\UsesMockPlugin;
-use MyParcelNL\Sdk\src\Support\Collection;
 use Tab;
 use function MyParcelNL\Pdk\Tests\usesShared;
 use function MyParcelNL\PrestaShop\psFactory;
@@ -26,7 +29,7 @@
 
 usesShared(new UsesMockPlugin());
 
-it('executes database migrations', function () {
+it('installs: executes database migrations', function () {
     /** @var \MyParcelNL $module */
     $module = Pdk::get('moduleInstance');
 
@@ -37,21 +40,32 @@
     expect(MockPsDb::getDatabase())->toHaveKeys(MYPARCEL_TABLES);
 });
 
-it('installs tabs', function () {
+it('installs: registers hooks', function () {
+    /** @var \MyParcelNL $module */
+    $module = Pdk::get('moduleInstance');
+
+    expect(MockPsObjectModels::getByClass(Hook::class))->toBeEmpty();
+    Installer::install($module);
+
+    $createdHooks = MockPsObjectModels::getByClass(Hook::class);
+
+    expect($createdHooks)->not->toBeEmpty();
+    $this->assertMatchesJsonSnapshot(json_encode($createdHooks->toArray(Arrayable::SKIP_NULL)));
+});
+
+it('installs: installs tabs', function () {
     /** @var \MyParcelNL $module */
     $module = Pdk::get('moduleInstance');
-    /** @var \PrestaShopBundle\Entity\Repository\TabRepository $tabRepository */
-    $tabRepository = Pdk::get('ps.tabRepository');
 
-    expect($tabRepository->findAll())->toBeEmpty();
+    expect(MockPsObjectModels::getByClass(Tab::class))->toBeEmpty();
     Installer::install($module);
 
     $this->assertMatchesJsonSnapshot(
-        json_encode((new Collection($tabRepository->findByModule($module->name)))->toArray())
+        json_encode((new Collection(MockPsObjectModels::getByClass(Tab::class)))->toArray(Arrayable::SKIP_NULL))
     );
 });
 
-it('doesn\'t add same tab twice', function () {
+it('installs: doesn\'t add same tab twice', function () {
     /** @var \MyParcelNL $module */
     $module = Pdk::get('moduleInstance');
     /** @var \PrestaShopBundle\Entity\Repository\TabRepository $tabRepository */
diff --git a/tests/__snapshots__/PsInstallerServiceTest__it_installs_tabs__1.json b/tests/__snapshots__/PsInstallerServiceTest__it_installs_installs_tabs__1.json
similarity index 75%
rename from tests/__snapshots__/PsInstallerServiceTest__it_installs_tabs__1.json
rename to tests/__snapshots__/PsInstallerServiceTest__it_installs_installs_tabs__1.json
index 3dda314c..c5f676e6 100644
--- a/tests/__snapshots__/PsInstallerServiceTest__it_installs_tabs__1.json
+++ b/tests/__snapshots__/PsInstallerServiceTest__it_installs_installs_tabs__1.json
@@ -1,14 +1,11 @@
 {
     "1": {
-        "id_lang": null,
-        "id_shop": null,
         "active": 1,
         "class_name": "MyParcelNLAdminSettings",
         "route_name": "myparcelnl_settings",
         "name": {
             "1": "MyParcelNL"
         },
-        "id_parent": null,
         "module": "myparcelnl",
         "id": 1
     }
diff --git a/tests/__snapshots__/PsInstallerServiceTest__it_installs_registers_hooks__1.json b/tests/__snapshots__/PsInstallerServiceTest__it_installs_registers_hooks__1.json
new file mode 100644
index 00000000..cdfbe7bc
--- /dev/null
+++ b/tests/__snapshots__/PsInstallerServiceTest__it_installs_registers_hooks__1.json
@@ -0,0 +1,58 @@
+{
+    "1": {
+        "name": "displayBeforeCarrier",
+        "id": 1
+    },
+    "2": {
+        "name": "displayCarrierExtraContent",
+        "id": 2
+    },
+    "3": {
+        "name": "actionCarrierProcess",
+        "id": 3
+    },
+    "4": {
+        "name": "actionOrderGridDefinitionModifier",
+        "id": 4
+    },
+    "5": {
+        "name": "actionOrderGridPresenterModifier",
+        "id": 5
+    },
+    "6": {
+        "name": "actionObjectCustomerMessageAddAfter",
+        "id": 6
+    },
+    "7": {
+        "name": "displayAdminOrderMain",
+        "id": 7
+    },
+    "8": {
+        "name": "actionProductUpdate",
+        "id": 8
+    },
+    "9": {
+        "name": "displayAdminProductsExtra",
+        "id": 9
+    },
+    "10": {
+        "name": "displayAdminAfterHeader",
+        "id": 10
+    },
+    "11": {
+        "name": "displayAdminEndContent",
+        "id": 11
+    },
+    "12": {
+        "name": "displayBackOfficeHeader",
+        "id": 12
+    },
+    "13": {
+        "name": "displayHeader",
+        "id": 13
+    },
+    "14": {
+        "name": "actionCarrierUpdate",
+        "id": 14
+    }
+}
diff --git a/tests/mock_class_map.php b/tests/mock_class_map.php
index 04d1e384..0b0cfec4 100644
--- a/tests/mock_class_map.php
+++ b/tests/mock_class_map.php
@@ -164,6 +164,11 @@ abstract class GroupCore extends ObjectModel { }
 
 final class Group extends GroupCore { }
 
+/** @see \HookCore */
+abstract class HookCore extends ObjectModel { }
+
+final class Hook extends HookCore { }
+
 /** @see \LangCore */
 abstract class LangCore extends ObjectModel { }