diff --git a/tests/Feature/Initialize/InitializeGroupsTest.php b/tests/Feature/Initialize/InitializeGroupsTest.php
new file mode 100644
index 00000000..ea8c04d9
--- /dev/null
+++ b/tests/Feature/Initialize/InitializeGroupsTest.php
@@ -0,0 +1,47 @@
+<?php
+
+namespace Tests\Feature\Initialize;
+
+use App\Initialize\InitializeGroups;
+use App\Setting\NamiSettings;
+use Illuminate\Foundation\Testing\DatabaseTransactions;
+use Tests\TestCase;
+use Zoomyboy\LaravelNami\Fakes\GroupFake;
+
+class InitializeGroupsTest extends TestCase
+{
+    use DatabaseTransactions;
+
+    public function testItInitializesGroups(): void
+    {
+        app(GroupFake::class)
+            ->fetches(null, [1000 => ['name' => 'testgroup']])
+            ->fetches(1000, []);
+
+        $this->withoutExceptionHandling()->login()->loginNami();
+
+        (new InitializeGroups(app(NamiSettings::class)->login()))->handle();
+
+        $this->assertDatabaseHas('groups', ['nami_id' => 1000, 'name' => 'testgroup']);
+    }
+
+    public function testItInitializesSubgroups(): void
+    {
+        app(GroupFake::class)
+            ->fetches(null, [1000 => ['name' => 'testgroup']])
+            ->fetches(1000, [
+                1001 => ['name' => 'subgroup1'],
+                1002 => ['name' => 'subgroup2'],
+            ])
+            ->fetches(1001, [])
+            ->fetches(1002, []);
+
+        $this->withoutExceptionHandling()->login()->loginNami();
+
+        (new InitializeGroups(app(NamiSettings::class)->login()))->handle();
+
+        $this->assertDatabaseHas('groups', ['nami_id' => 1000, 'name' => 'testgroup']);
+        $this->assertDatabaseHas('groups', ['nami_id' => 1001, 'name' => 'subgroup1']);
+        $this->assertDatabaseHas('groups', ['nami_id' => 1002, 'name' => 'subgroup2']);
+    }
+}