diff --git a/tests/Unit/Filament/Resources/TimeEntryResourceTest.php b/tests/Unit/Filament/Resources/TimeEntryResourceTest.php
index 86d2f9e1..d4cdec04 100644
--- a/tests/Unit/Filament/Resources/TimeEntryResourceTest.php
+++ b/tests/Unit/Filament/Resources/TimeEntryResourceTest.php
@@ -5,6 +5,8 @@ declare(strict_types=1);
 namespace Tests\Unit\Filament\Resources;
 
 use App\Filament\Resources\TimeEntryResource;
+use App\Models\Member;
+use App\Models\Organization;
 use App\Models\TimeEntry;
 use App\Models\User;
 use Illuminate\Support\Facades\Config;
@@ -50,4 +52,149 @@ class TimeEntryResourceTest extends FilamentTestCase
         // Assert
         $response->assertSuccessful();
     }
+
+    public function test_can_see_create_page_of_time_entry(): void
+    {
+        // Act
+        $response = Livewire::test(TimeEntryResource\Pages\CreateTimeEntry::class);
+
+        // Assert
+        $response->assertSuccessful();
+    }
+
+    public function test_can_create_time_entry(): void
+    {
+        // Arrange
+        $organization = Organization::factory()->create();
+        $user = User::factory()->create();
+        $member = Member::factory()
+            ->forOrganization($organization)
+            ->forUser($user)
+            ->create();
+
+        // Act
+        $response = Livewire::test(TimeEntryResource\Pages\CreateTimeEntry::class)
+            ->fillForm([
+                'description' => 'Test time entry',
+                'billable' => true,
+                'start' => '2024-01-01 08:00:00',
+                'end' => '2024-01-01 10:00:00',
+                'member_id' => $member->getKey(),
+            ])
+            ->call('create')
+            ->assertHasNoFormErrors();
+
+        // Assert
+        $response->assertSuccessful();
+        $timeEntry = TimeEntry::where('description', 'Test time entry')->first();
+        $this->assertNotNull($timeEntry);
+        $this->assertSame($member->getKey(), $timeEntry->member_id);
+        $this->assertSame($user->getKey(), $timeEntry->user_id);
+        $this->assertSame($organization->getKey(), $timeEntry->organization_id);
+        $this->assertTrue($timeEntry->billable);
+    }
+
+    public function test_can_create_time_entry_and_derives_user_and_organization_from_member(): void
+    {
+        // Arrange
+        $organization = Organization::factory()->create();
+        $user = User::factory()->create();
+        $member = Member::factory()
+            ->forOrganization($organization)
+            ->forUser($user)
+            ->create();
+        $otherUser = User::factory()->create();
+        $otherOrganization = Organization::factory()->create();
+
+        // Act
+        $response = Livewire::test(TimeEntryResource\Pages\CreateTimeEntry::class)
+            ->fillForm([
+                'description' => 'Derived fields test',
+                'billable' => false,
+                'start' => '2024-03-01 09:00:00',
+                'end' => '2024-03-01 11:00:00',
+                'member_id' => $member->getKey(),
+                'user_id' => $otherUser->getKey(),
+                'organization_id' => $otherOrganization->getKey(),
+            ])
+            ->call('create')
+            ->assertHasNoFormErrors();
+
+        // Assert
+        $response->assertSuccessful();
+        $timeEntry = TimeEntry::where('description', 'Derived fields test')->first();
+        $this->assertNotNull($timeEntry);
+        $this->assertSame($user->getKey(), $timeEntry->user_id);
+        $this->assertSame($organization->getKey(), $timeEntry->organization_id);
+    }
+
+    public function test_can_update_time_entry(): void
+    {
+        // Arrange
+        $organization = Organization::factory()->create();
+        $user = User::factory()->create();
+        $member = Member::factory()
+            ->forOrganization($organization)
+            ->forUser($user)
+            ->create();
+        $timeEntry = TimeEntry::factory()->forMember($member)->create();
+
+        // Act
+        $response = Livewire::test(TimeEntryResource\Pages\EditTimeEntry::class, ['record' => $timeEntry->getKey()])
+            ->fillForm([
+                'description' => 'Updated description',
+                'billable' => true,
+                'start' => '2024-02-01 08:00:00',
+                'end' => '2024-02-01 12:00:00',
+                'member_id' => $member->getKey(),
+            ])
+            ->call('save')
+            ->assertHasNoFormErrors();
+
+        // Assert
+        $response->assertSuccessful();
+        $timeEntry->refresh();
+        $this->assertSame('Updated description', $timeEntry->description);
+        $this->assertTrue($timeEntry->billable);
+        $this->assertSame($user->getKey(), $timeEntry->user_id);
+        $this->assertSame($organization->getKey(), $timeEntry->organization_id);
+    }
+
+    public function test_update_time_entry_derives_user_and_organization_from_new_member(): void
+    {
+        // Arrange
+        $organization = Organization::factory()->create();
+        $user = User::factory()->create();
+        $member = Member::factory()
+            ->forOrganization($organization)
+            ->forUser($user)
+            ->create();
+        $timeEntry = TimeEntry::factory()->create();
+
+        $newOrganization = Organization::factory()->create();
+        $newUser = User::factory()->create();
+        $newMember = Member::factory()
+            ->forOrganization($newOrganization)
+            ->forUser($newUser)
+            ->create();
+
+        // Act
+        $response = Livewire::test(TimeEntryResource\Pages\EditTimeEntry::class, ['record' => $timeEntry->getKey()])
+            ->fillForm([
+                'description' => 'Reassigned entry',
+                'billable' => false,
+                'start' => '2024-02-01 08:00:00',
+                'end' => '2024-02-01 12:00:00',
+                'member_id' => $newMember->getKey(),
+            ])
+            ->call('save')
+            ->assertHasNoFormErrors();
+
+        // Assert
+        $response->assertSuccessful();
+        $timeEntry->refresh();
+        $this->assertSame($newMember->getKey(), $timeEntry->member_id);
+        $this->assertSame($newUser->getKey(), $timeEntry->user_id);
+        $this->assertSame($newOrganization->getKey(), $timeEntry->organization_id);
+    }
 }