diff --git a/backend/tests/Feature/Database/TanachSeederTest.php b/backend/tests/Feature/Database/TanachSeederTest.php
new file mode 100644
index 0000000..1cb44bb
--- /dev/null
+++ b/backend/tests/Feature/Database/TanachSeederTest.php
@@ -0,0 +1,184 @@
+<?php
+
+namespace Tests\Feature\Database;
+
+use App\Element\Element;
+use App\Element\ElementRepository;
+use App\Set\Set;
+use App\Set\SetLevelRepository;
+use App\Set\SetRepository;
+use App\Shared\ValueObject\EmailAddress;
+use App\User\UserRepository;
+use Database\Seeders\TanachSeeder;
+use Database\Seeders\UserSeeder;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class TanachSeederTest extends TestCase
+{
+    use RefreshDatabase;
+
+    private const array SEFARIM_BY_CHELEK = [
+        'Torah' => [
+            'Bereishis' => 50,
+            'Shemos' => 40,
+            'Vayikra' => 27,
+            'Bamidbar' => 36,
+            'Devarim' => 34,
+        ],
+        "Nevi'im" => [
+            'Yehoshua' => 24,
+            'Shoftim' => 21,
+            'Shmuel Alef' => 31,
+            'Shmuel Beis' => 24,
+            'Melachim Alef' => 22,
+            'Melachim Beis' => 25,
+            'Yeshayahu' => 66,
+            'Yirmiyahu' => 52,
+            'Yechezkel' => 48,
+            'Hoshea' => 14,
+            'Yoel' => 4,
+            'Amos' => 9,
+            'Ovadiah' => 1,
+            'Yonah' => 4,
+            'Michah' => 7,
+            'Nachum' => 3,
+            'Chavakuk' => 3,
+            'Tzefaniah' => 3,
+            'Chaggai' => 2,
+            'Zechariah' => 14,
+            'Malachi' => 3,
+        ],
+        'Kesuvim' => [
+            'Tehillim' => 150,
+            'Mishlei' => 31,
+            'Iyov' => 42,
+            'Shir HaShirim' => 8,
+            'Rus' => 4,
+            'Eichah' => 5,
+            'Koheles' => 12,
+            'Esther' => 10,
+            'Daniel' => 12,
+            'Ezra' => 10,
+            'Nechemiah' => 13,
+            'Divrei HaYamim Alef' => 29,
+            'Divrei HaYamim Beis' => 36,
+        ],
+    ];
+
+    public function test_it_seeds_the_complete_tanach_idempotently(): void
+    {
+        $this->seed(TanachSeeder::class);
+        $this->seed(TanachSeeder::class);
+
+        $this->assertDatabaseCount('users', 1);
+        $this->assertDatabaseCount('sets', 1);
+        $this->assertDatabaseCount('set_levels', 3);
+        $this->assertDatabaseCount('elements', 971);
+
+        $user = app(UserRepository::class)->findByEmail(
+            new EmailAddress(UserSeeder::EMAIL),
+        );
+        $this->assertNotNull($user);
+
+        $tanach = $this->findTanach();
+        $this->assertSame(
+            UserSeeder::EMAIL,
+            $tanach->getCreator()->getEmail()->value(),
+        );
+
+        $levels = app(SetLevelRepository::class)->findBySet($tanach);
+        $this->assertSame(
+            ['chelek', 'sefer', 'perek'],
+            array_map(function ($level): string {
+                return $level->getKind();
+            }, $levels),
+        );
+
+        $elementRepository = app(ElementRepository::class);
+        $chelakim = $elementRepository->findTopLevelBySet($tanach);
+        $this->assertElements(
+            elements: $chelakim,
+            expectedNames: array_keys(self::SEFARIM_BY_CHELEK),
+            expectedKind: 'chelek',
+        );
+
+        $seferCount = 0;
+        $perekCount = 0;
+
+        foreach ($chelakim as $chelek) {
+            $expectedSefarim = self::SEFARIM_BY_CHELEK[
+                $chelek->getName()
+            ] ?? null;
+            $this->assertNotNull($expectedSefarim);
+
+            $sefarim = $elementRepository->findByParentElement($chelek);
+            $this->assertElements(
+                elements: $sefarim,
+                expectedNames: array_keys($expectedSefarim),
+                expectedKind: 'sefer',
+            );
+            $seferCount += count($sefarim);
+
+            foreach ($sefarim as $sefer) {
+                $expectedPerekCount = $expectedSefarim[
+                    $sefer->getName()
+                ] ?? null;
+                $this->assertNotNull($expectedPerekCount);
+
+                $expectedPerekNames = [];
+                for (
+                    $perekNumber = 1;
+                    $perekNumber <= $expectedPerekCount;
+                    $perekNumber++
+                ) {
+                    $expectedPerekNames[] = "Perek {$perekNumber}";
+                }
+
+                $perakim = $elementRepository->findByParentElement($sefer);
+                $this->assertElements(
+                    elements: $perakim,
+                    expectedNames: $expectedPerekNames,
+                    expectedKind: 'perek',
+                );
+                $perekCount += count($perakim);
+            }
+        }
+
+        $this->assertSame(39, $seferCount);
+        $this->assertSame(929, $perekCount);
+    }
+
+    private function findTanach(): Set
+    {
+        foreach (app(SetRepository::class)->all() as $set) {
+            if ($set->getName() === 'Tanach') {
+                return $set;
+            }
+        }
+
+        $this->fail('Tanach set was not seeded');
+    }
+
+    /**
+     * @param list<Element> $elements
+     * @param list<string> $expectedNames
+     */
+    private function assertElements(
+        array $elements,
+        array $expectedNames,
+        string $expectedKind,
+    ): void {
+        $this->assertSame(
+            $expectedNames,
+            array_map(function (Element $element): string {
+                return $element->getName();
+            }, $elements),
+        );
+
+        foreach ($elements as $index => $element) {
+            $this->assertSame($expectedKind, $element->getKind());
+            $this->assertSame($index + 1, $element->getPosition());
+        }
+    }
+}