diff --git a/api/tests/unit/Repositories/WorkingHoursViewRepositoryTest.php b/api/tests/unit/Repositories/WorkingHoursViewRepositoryTest.php
new file mode 100644
index 0000000..7ccbc67
--- /dev/null
+++ b/api/tests/unit/Repositories/WorkingHoursViewRepositoryTest.php
@@ -0,0 +1,108 @@
+<?php
+
+namespace TorstenHettstedt\TimekeepingApi\Tests\Unit\Repositories;
+
+use Codeception\Test\Unit;
+use PDO;
+use TorstenHettstedt\TimekeepingApi\Models\PeriodDesignationEnum;
+use TorstenHettstedt\TimekeepingApi\Models\WorkingHoursView;
+use TorstenHettstedt\TimekeepingApi\Repositories\RepositoryRecordNotFoundException;
+use TorstenHettstedt\TimekeepingApi\Repositories\WorkingHoursViewRepository;
+
+class WorkingHoursViewRepositoryTest extends Unit
+{
+    const EXISTING_DATE     = '2020-01-28';
+    const EXISTING_INTERVAL = 'PT7H20M';
+    const NEW_DATE          = '2020-04-01';
+    const NEW_INTERVAL      = 'PT7H59M';
+    const RECORDS_COUNT     = 61;
+
+    protected PDO          $pdoObject;
+
+    protected function _before(): void
+    {
+        $this->pdoObject = new PDO('pgsql:host=psql.torsten-hettstedt.net;port=5432;dbname=testdb;user=bruce;password=mypass');
+        parent::_before();
+    }
+
+    /**
+     * @return array[]
+     */
+    public function listObjectProvider(): array
+    {
+        return [
+            [PeriodDesignationEnum::YEARLY(),  1],
+            [PeriodDesignationEnum::MONTHLY(), 3],
+            [PeriodDesignationEnum::WEEKLY(), 13],
+        ];
+    }
+
+    /**
+     * @return array[]
+     */
+    public function existingObjectProvider(): array
+    {
+        return [
+            [PeriodDesignationEnum::YEARLY(),  '2020', 61],
+            [PeriodDesignationEnum::MONTHLY(), '2020-02', 20],
+            [PeriodDesignationEnum::WEEKLY(),  '2020#3', 5],
+        ];
+    }
+
+    /**
+     * @return array[]
+     */
+    public function notExistingObjectProvider(): array
+    {
+        return [
+            [PeriodDesignationEnum::YEARLY(),  '2022',],
+            [PeriodDesignationEnum::MONTHLY(), '2020-05',],
+            [PeriodDesignationEnum::WEEKLY(),  '2020#30',],
+        ];
+    }
+
+    /**
+     * @param PeriodDesignationEnum $period
+     * @param int                   $count_records
+     *
+     * @dataProvider listObjectProvider
+     */
+    public function testFindAll(PeriodDesignationEnum $period, int $count_records): void
+    {
+        $repository = new WorkingHoursViewRepository($this->pdoObject, $period);
+        $models = $repository->findAll();
+        $this->assertIsArray($models);
+        $this->assertContainsOnly(WorkingHoursView::class, $models);
+        $this->assertCount(self::RECORDS_COUNT, $models);
+    }
+
+    /**
+     *
+     * @dataProvider existingObjectProvider
+     *
+     * @param PeriodDesignationEnum $period
+     * @param string                $search
+     */
+    public function testExistingFindByKey(PeriodDesignationEnum $period, string $search, int $workingDays): void
+    {
+        $repository = new WorkingHoursViewRepository($this->pdoObject, $period);
+        $model = $repository->findByKey(self::EXISTING_DATE);
+        $this->assertInstanceOf(WorkingHoursView::class, $model);
+        $this->assertEquals($workingDays, $model->getWorkingDays());
+    }
+
+    /**
+     * @param PeriodDesignationEnum $period
+     * @param string                $search
+     *
+     * @dataProvider notExistingObjectProvider
+     *
+     * @throws RepositoryRecordNotFoundException
+     */
+    public function testNotExistingFindByKey(PeriodDesignationEnum $period, string $search): void
+    {
+        $repository = new WorkingHoursViewRepository($this->pdoObject, $period);
+        $this->expectException(RepositoryRecordNotFoundException::class);
+        $repository->findByKey(self::NEW_DATE);
+    }
+}