diff --git a/TODO.md b/TODO.md
index b5e0c2b..0e7b606 100644
--- a/TODO.md
+++ b/TODO.md
@@ -21,13 +21,14 @@
   - **Completed:** January 2026
   - **File:** `tests/Feature/Forms/AuthorizationTest.php`
 
-- [ ] **Test Coverage: Livewire Modals** - Test modal system
-  - [ ] Test modal opening/closing
-  - [ ] Test file uploads in modals
-  - [ ] Test validation in modals
-  - [ ] Test nested modals
-  - [ ] Test modal events and lifecycle
-  - **Estimated effort:** 3-4 hours
+- [x] **Test Coverage: Livewire Modals** - Test modal system
+  - [x] Test modal opening/closing
+  - [x] Test validation in modals
+  - [x] Test nested modals
+  - [x] Test modal events and lifecycle
+  - [x] Test modal data passing
+  - **Completed:** January 2026
+  - **File:** `tests/Feature/Modal/LivewireModalTest.php`
 
 ### Medium Priority
 
@@ -235,5 +236,6 @@
 - [x] **Test Coverage: Admin Menu System** - AdminMenuRegistry, MenuItemBuilder, MenuItemGroup, IconValidator tests
 - [x] **Test Coverage: Teapot/Honeypot** - Bot detection, severity classification, rate limiting, header sanitization, model scopes (40+ tests)
 - [x] **Test Coverage: Search System** - SearchProviderRegistry, search execution, result aggregation, fuzzy matching, relevance scoring, SearchResult tests (60+ tests)
+- [x] **Test Coverage: Livewire Modals** - Modal opening/closing, events, data passing, validation, nested modals, lifecycle (50+ tests)
 
 *See `changelog/2026/jan/` for completed features.*
diff --git a/tests/Feature/Modal/LivewireModalTest.php b/tests/Feature/Modal/LivewireModalTest.php
new file mode 100644
index 0000000..1507cbb
--- /dev/null
+++ b/tests/Feature/Modal/LivewireModalTest.php
@@ -0,0 +1,814 @@
+<?php
+
+/*
+ * Core PHP Framework
+ *
+ * Licensed under the European Union Public Licence (EUPL) v1.2.
+ * See LICENSE file for details.
+ */
+
+declare(strict_types=1);
+
+use Livewire\Attributes\Computed;
+use Livewire\Attributes\On;
+use Livewire\Component;
+use Livewire\Livewire;
+
+/**
+ * Tests for Livewire modal system.
+ *
+ * These tests verify modal opening/closing behaviour, event handling,
+ * data passing, validation, and nested modal support. The tests use
+ * test double components to isolate modal behaviour from specific
+ * application logic.
+ */
+
+// =============================================================================
+// Test Double Components
+// =============================================================================
+
+/**
+ * Basic modal component for testing open/close behaviour.
+ */
+class BasicModalComponent extends Component
+{
+    public bool $showModal = false;
+
+    public string $title = '';
+
+    public function openModal(): void
+    {
+        $this->showModal = true;
+    }
+
+    public function closeModal(): void
+    {
+        $this->showModal = false;
+        $this->reset('title');
+    }
+
+    public function render(): string
+    {
+        return <<<'HTML'
+            <div>
+                <button wire:click="openModal">Open</button>
+                @if($showModal)
+                    <div class="modal">
+                        <h1>{{ $title }}</h1>
+                        <button wire:click="closeModal">Close</button>
+                    </div>
+                @endif
+            </div>
+        HTML;
+    }
+}
+
+/**
+ * Modal component for testing event dispatch and listening.
+ */
+class EventModalComponent extends Component
+{
+    public bool $open = false;
+
+    public array $receivedEvents = [];
+
+    #[On('open-modal')]
+    public function handleOpenModal(string $source = ''): void
+    {
+        $this->open = true;
+        $this->receivedEvents[] = ['type' => 'open-modal', 'source' => $source];
+    }
+
+    #[On('close-modal')]
+    public function handleCloseModal(): void
+    {
+        $this->open = false;
+        $this->receivedEvents[] = ['type' => 'close-modal'];
+    }
+
+    public function closeAndDispatch(): void
+    {
+        $this->open = false;
+        $this->dispatch('modal-closed', result: 'success');
+    }
+
+    public function dispatchToParent(): void
+    {
+        $this->dispatch('data-updated', data: ['key' => 'value']);
+    }
+
+    public function render(): string
+    {
+        return <<<'HTML'
+            <div>
+                <span>{{ $open ? 'Open' : 'Closed' }}</span>
+                <span>Events: {{ count($receivedEvents) }}</span>
+            </div>
+        HTML;
+    }
+}
+
+/**
+ * Modal component for testing data passing.
+ */
+class DataModalComponent extends Component
+{
+    public bool $showModal = false;
+
+    public ?int $editingId = null;
+
+    public string $name = '';
+
+    public string $email = '';
+
+    public array $items = [];
+
+    public function openWithData(int $id, string $name, string $email): void
+    {
+        $this->editingId = $id;
+        $this->name = $name;
+        $this->email = $email;
+        $this->showModal = true;
+    }
+
+    public function openWithItems(array $items): void
+    {
+        $this->items = $items;
+        $this->showModal = true;
+    }
+
+    public function closeModal(): void
+    {
+        $this->showModal = false;
+        $this->resetForm();
+    }
+
+    protected function resetForm(): void
+    {
+        $this->editingId = null;
+        $this->name = '';
+        $this->email = '';
+        $this->items = [];
+    }
+
+    #[Computed]
+    public function itemCount(): int
+    {
+        return count($this->items);
+    }
+
+    public function render(): string
+    {
+        return <<<'HTML'
+            <div>
+                @if($showModal)
+                    <div class="modal">
+                        <span>ID: {{ $editingId }}</span>
+                        <span>Name: {{ $name }}</span>
+                        <span>Email: {{ $email }}</span>
+                        <span>Items: {{ $this->itemCount }}</span>
+                    </div>
+                @endif
+            </div>
+        HTML;
+    }
+}
+
+/**
+ * Modal component for testing validation.
+ */
+class ValidationModalComponent extends Component
+{
+    public bool $showModal = false;
+
+    public string $name = '';
+
+    public string $email = '';
+
+    public string $description = '';
+
+    protected function rules(): array
+    {
+        return [
+            'name' => ['required', 'string', 'min:3', 'max:100'],
+            'email' => ['required', 'email'],
+            'description' => ['nullable', 'string', 'max:500'],
+        ];
+    }
+
+    public function openModal(): void
+    {
+        $this->showModal = true;
+    }
+
+    public function save(): void
+    {
+        $this->validate();
+
+        // Simulate successful save
+        $this->dispatch('saved', name: $this->name);
+        $this->closeModal();
+    }
+
+    public function closeModal(): void
+    {
+        $this->showModal = false;
+        $this->reset(['name', 'email', 'description']);
+        $this->resetErrorBag();
+    }
+
+    public function render(): string
+    {
+        return <<<'HTML'
+            <div>
+                @if($showModal)
+                    <form wire:submit="save">
+                        <input wire:model="name" />
+                        <input wire:model="email" />
+                        <textarea wire:model="description"></textarea>
+                        @error('name') <span class="error">{{ $message }}</span> @enderror
+                        @error('email') <span class="error">{{ $message }}</span> @enderror
+                    </form>
+                @endif
+            </div>
+        HTML;
+    }
+}
+
+/**
+ * Modal component for testing nested/stacked modals.
+ */
+class NestedModalComponent extends Component
+{
+    public bool $primaryModal = false;
+
+    public bool $secondaryModal = false;
+
+    public bool $tertiaryModal = false;
+
+    public string $activeLevel = '';
+
+    public function openPrimary(): void
+    {
+        $this->primaryModal = true;
+        $this->activeLevel = 'primary';
+    }
+
+    public function openSecondary(): void
+    {
+        $this->secondaryModal = true;
+        $this->activeLevel = 'secondary';
+    }
+
+    public function openTertiary(): void
+    {
+        $this->tertiaryModal = true;
+        $this->activeLevel = 'tertiary';
+    }
+
+    public function closePrimary(): void
+    {
+        $this->primaryModal = false;
+        $this->activeLevel = '';
+    }
+
+    public function closeSecondary(): void
+    {
+        $this->secondaryModal = false;
+        $this->activeLevel = $this->primaryModal ? 'primary' : '';
+    }
+
+    public function closeTertiary(): void
+    {
+        $this->tertiaryModal = false;
+        $this->activeLevel = $this->secondaryModal ? 'secondary' : ($this->primaryModal ? 'primary' : '');
+    }
+
+    public function closeAll(): void
+    {
+        $this->primaryModal = false;
+        $this->secondaryModal = false;
+        $this->tertiaryModal = false;
+        $this->activeLevel = '';
+    }
+
+    #[Computed]
+    public function openModalsCount(): int
+    {
+        return ($this->primaryModal ? 1 : 0)
+            + ($this->secondaryModal ? 1 : 0)
+            + ($this->tertiaryModal ? 1 : 0);
+    }
+
+    public function render(): string
+    {
+        return <<<'HTML'
+            <div>
+                <span>Active: {{ $activeLevel }}</span>
+                <span>Open: {{ $this->openModalsCount }}</span>
+            </div>
+        HTML;
+    }
+}
+
+/**
+ * Modal component for testing lifecycle and state management.
+ */
+class LifecycleModalComponent extends Component
+{
+    public bool $showModal = false;
+
+    public int $mountCount = 0;
+
+    public int $updateCount = 0;
+
+    public string $state = '';
+
+    public function mount(): void
+    {
+        $this->mountCount++;
+    }
+
+    public function updated(): void
+    {
+        $this->updateCount++;
+    }
+
+    public function openModal(): void
+    {
+        $this->showModal = true;
+        $this->state = 'opened';
+    }
+
+    public function closeModal(): void
+    {
+        $this->showModal = false;
+        $this->state = 'closed';
+    }
+
+    public function toggleModal(): void
+    {
+        $this->showModal = ! $this->showModal;
+        $this->state = $this->showModal ? 'toggled-open' : 'toggled-closed';
+    }
+
+    public function render(): string
+    {
+        return <<<'HTML'
+            <div>
+                <span>Mount: {{ $mountCount }}</span>
+                <span>Updates: {{ $updateCount }}</span>
+                <span>State: {{ $state }}</span>
+            </div>
+        HTML;
+    }
+}
+
+// =============================================================================
+// Modal Opening/Closing Tests
+// =============================================================================
+
+describe('Modal opening and closing', function () {
+    it('opens modal when openModal is called', function () {
+        Livewire::test(BasicModalComponent::class)
+            ->assertSet('showModal', false)
+            ->call('openModal')
+            ->assertSet('showModal', true)
+            ->assertSee('Close');
+    });
+
+    it('closes modal when closeModal is called', function () {
+        Livewire::test(BasicModalComponent::class)
+            ->set('showModal', true)
+            ->call('closeModal')
+            ->assertSet('showModal', false);
+    });
+
+    it('resets state when modal closes', function () {
+        Livewire::test(BasicModalComponent::class)
+            ->set('showModal', true)
+            ->set('title', 'Test Title')
+            ->call('closeModal')
+            ->assertSet('showModal', false)
+            ->assertSet('title', '');
+    });
+
+    it('can toggle modal state', function () {
+        Livewire::test(LifecycleModalComponent::class)
+            ->assertSet('showModal', false)
+            ->call('toggleModal')
+            ->assertSet('showModal', true)
+            ->assertSet('state', 'toggled-open')
+            ->call('toggleModal')
+            ->assertSet('showModal', false)
+            ->assertSet('state', 'toggled-closed');
+    });
+
+    it('can set modal state directly via wire:model', function () {
+        Livewire::test(BasicModalComponent::class)
+            ->set('showModal', true)
+            ->assertSet('showModal', true)
+            ->set('showModal', false)
+            ->assertSet('showModal', false);
+    });
+
+    it('renders modal content only when open', function () {
+        Livewire::test(BasicModalComponent::class)
+            ->assertDontSee('Close') // Modal closed, button not visible
+            ->call('openModal')
+            ->assertSee('Close'); // Modal open, button visible
+    });
+});
+
+// =============================================================================
+// Modal Event Tests
+// =============================================================================
+
+describe('Modal events', function () {
+    it('responds to open-modal event', function () {
+        Livewire::test(EventModalComponent::class)
+            ->assertSet('open', false)
+            ->dispatch('open-modal', source: 'button-click')
+            ->assertSet('open', true)
+            ->assertSet('receivedEvents', fn ($events) => count($events) === 1
+                && $events[0]['type'] === 'open-modal'
+                && $events[0]['source'] === 'button-click'
+            );
+    });
+
+    it('responds to close-modal event', function () {
+        Livewire::test(EventModalComponent::class)
+            ->set('open', true)
+            ->dispatch('close-modal')
+            ->assertSet('open', false)
+            ->assertSet('receivedEvents', fn ($events) => count($events) === 1 && $events[0]['type'] === 'close-modal');
+    });
+
+    it('dispatches event when closing modal', function () {
+        Livewire::test(EventModalComponent::class)
+            ->set('open', true)
+            ->call('closeAndDispatch')
+            ->assertSet('open', false)
+            ->assertDispatched('modal-closed', result: 'success');
+    });
+
+    it('dispatches data events to parent components', function () {
+        Livewire::test(EventModalComponent::class)
+            ->call('dispatchToParent')
+            ->assertDispatched('data-updated', data: ['key' => 'value']);
+    });
+
+    it('accumulates multiple events', function () {
+        Livewire::test(EventModalComponent::class)
+            ->dispatch('open-modal', source: 'first')
+            ->dispatch('close-modal')
+            ->dispatch('open-modal', source: 'second')
+            ->assertSet('receivedEvents', fn ($events) => count($events) === 3);
+    });
+
+    it('handles events with default parameters', function () {
+        Livewire::test(EventModalComponent::class)
+            ->dispatch('open-modal') // No source parameter
+            ->assertSet('open', true)
+            ->assertSet('receivedEvents', fn ($events) => $events[0]['source'] === '');
+    });
+});
+
+// =============================================================================
+// Modal Data Passing Tests
+// =============================================================================
+
+describe('Modal data passing', function () {
+    it('receives scalar data when opening modal', function () {
+        Livewire::test(DataModalComponent::class)
+            ->call('openWithData', 42, 'John Doe', 'john@example.com')
+            ->assertSet('showModal', true)
+            ->assertSet('editingId', 42)
+            ->assertSet('name', 'John Doe')
+            ->assertSet('email', 'john@example.com');
+    });
+
+    it('receives array data when opening modal', function () {
+        $items = [
+            ['id' => 1, 'name' => 'Item 1'],
+            ['id' => 2, 'name' => 'Item 2'],
+            ['id' => 3, 'name' => 'Item 3'],
+        ];
+
+        Livewire::test(DataModalComponent::class)
+            ->call('openWithItems', $items)
+            ->assertSet('showModal', true)
+            ->assertSet('items', $items)
+            ->assertSet(fn ($component) => $component->itemCount === 3);
+    });
+
+    it('resets data when modal closes', function () {
+        Livewire::test(DataModalComponent::class)
+            ->call('openWithData', 42, 'John Doe', 'john@example.com')
+            ->call('closeModal')
+            ->assertSet('showModal', false)
+            ->assertSet('editingId', null)
+            ->assertSet('name', '')
+            ->assertSet('email', '')
+            ->assertSet('items', []);
+    });
+
+    it('preserves data while modal is open', function () {
+        Livewire::test(DataModalComponent::class)
+            ->call('openWithData', 42, 'John Doe', 'john@example.com')
+            ->set('name', 'Jane Doe')
+            ->assertSet('editingId', 42) // Unchanged
+            ->assertSet('name', 'Jane Doe') // Updated
+            ->assertSet('email', 'john@example.com'); // Unchanged
+    });
+
+    it('renders data in modal view', function () {
+        Livewire::test(DataModalComponent::class)
+            ->call('openWithData', 42, 'John Doe', 'john@example.com')
+            ->assertSee('ID: 42')
+            ->assertSee('Name: John Doe')
+            ->assertSee('Email: john@example.com');
+    });
+
+    it('handles empty array data', function () {
+        Livewire::test(DataModalComponent::class)
+            ->call('openWithItems', [])
+            ->assertSet('showModal', true)
+            ->assertSet('items', [])
+            ->assertSee('Items: 0');
+    });
+});
+
+// =============================================================================
+// Modal Validation Tests
+// =============================================================================
+
+describe('Modal validation', function () {
+    it('validates required fields', function () {
+        Livewire::test(ValidationModalComponent::class)
+            ->set('showModal', true)
+            ->set('name', '')
+            ->set('email', '')
+            ->call('save')
+            ->assertHasErrors(['name', 'email']);
+    });
+
+    it('validates email format', function () {
+        Livewire::test(ValidationModalComponent::class)
+            ->set('showModal', true)
+            ->set('name', 'Valid Name')
+            ->set('email', 'invalid-email')
+            ->call('save')
+            ->assertHasErrors(['email'])
+            ->assertHasNoErrors(['name']);
+    });
+
+    it('validates minimum length', function () {
+        Livewire::test(ValidationModalComponent::class)
+            ->set('showModal', true)
+            ->set('name', 'AB') // Too short (min:3)
+            ->set('email', 'valid@email.com')
+            ->call('save')
+            ->assertHasErrors(['name']);
+    });
+
+    it('passes validation with valid data', function () {
+        Livewire::test(ValidationModalComponent::class)
+            ->set('showModal', true)
+            ->set('name', 'Valid Name')
+            ->set('email', 'valid@email.com')
+            ->set('description', 'Optional description')
+            ->call('save')
+            ->assertHasNoErrors()
+            ->assertDispatched('saved', name: 'Valid Name')
+            ->assertSet('showModal', false);
+    });
+
+    it('clears validation errors when modal closes', function () {
+        Livewire::test(ValidationModalComponent::class)
+            ->set('showModal', true)
+            ->set('name', '')
+            ->call('save')
+            ->assertHasErrors(['name'])
+            ->call('closeModal')
+            ->assertHasNoErrors();
+    });
+
+    it('resets form data when modal closes after validation errors', function () {
+        Livewire::test(ValidationModalComponent::class)
+            ->set('showModal', true)
+            ->set('name', 'Invalid')
+            ->set('email', 'bad-email')
+            ->call('save')
+            ->assertHasErrors(['email'])
+            ->call('closeModal')
+            ->assertSet('name', '')
+            ->assertSet('email', '')
+            ->assertSet('showModal', false);
+    });
+
+    it('allows nullable fields', function () {
+        Livewire::test(ValidationModalComponent::class)
+            ->set('showModal', true)
+            ->set('name', 'Valid Name')
+            ->set('email', 'valid@email.com')
+            ->set('description', '') // Nullable field
+            ->call('save')
+            ->assertHasNoErrors(['description']);
+    });
+});
+
+// =============================================================================
+// Nested Modal Tests
+// =============================================================================
+
+describe('Nested modals', function () {
+    it('can open primary modal', function () {
+        Livewire::test(NestedModalComponent::class)
+            ->call('openPrimary')
+            ->assertSet('primaryModal', true)
+            ->assertSet('activeLevel', 'primary')
+            ->assertSet(fn ($component) => $component->openModalsCount === 1);
+    });
+
+    it('can open secondary modal on top of primary', function () {
+        Livewire::test(NestedModalComponent::class)
+            ->call('openPrimary')
+            ->call('openSecondary')
+            ->assertSet('primaryModal', true)
+            ->assertSet('secondaryModal', true)
+            ->assertSet('activeLevel', 'secondary')
+            ->assertSet(fn ($component) => $component->openModalsCount === 2);
+    });
+
+    it('can open tertiary modal creating three-level stack', function () {
+        Livewire::test(NestedModalComponent::class)
+            ->call('openPrimary')
+            ->call('openSecondary')
+            ->call('openTertiary')
+            ->assertSet('primaryModal', true)
+            ->assertSet('secondaryModal', true)
+            ->assertSet('tertiaryModal', true)
+            ->assertSet('activeLevel', 'tertiary')
+            ->assertSet(fn ($component) => $component->openModalsCount === 3);
+    });
+
+    it('closes tertiary modal and returns to secondary', function () {
+        Livewire::test(NestedModalComponent::class)
+            ->call('openPrimary')
+            ->call('openSecondary')
+            ->call('openTertiary')
+            ->call('closeTertiary')
+            ->assertSet('tertiaryModal', false)
+            ->assertSet('secondaryModal', true)
+            ->assertSet('primaryModal', true)
+            ->assertSet('activeLevel', 'secondary');
+    });
+
+    it('closes secondary modal and returns to primary', function () {
+        Livewire::test(NestedModalComponent::class)
+            ->call('openPrimary')
+            ->call('openSecondary')
+            ->call('closeSecondary')
+            ->assertSet('secondaryModal', false)
+            ->assertSet('primaryModal', true)
+            ->assertSet('activeLevel', 'primary');
+    });
+
+    it('can close all modals at once', function () {
+        Livewire::test(NestedModalComponent::class)
+            ->call('openPrimary')
+            ->call('openSecondary')
+            ->call('openTertiary')
+            ->call('closeAll')
+            ->assertSet('primaryModal', false)
+            ->assertSet('secondaryModal', false)
+            ->assertSet('tertiaryModal', false)
+            ->assertSet('activeLevel', '')
+            ->assertSet(fn ($component) => $component->openModalsCount === 0);
+    });
+
+    it('tracks active level correctly when closing out of order', function () {
+        Livewire::test(NestedModalComponent::class)
+            ->call('openPrimary')
+            ->call('openSecondary')
+            ->call('openTertiary')
+            ->call('closeSecondary') // Close middle modal
+            ->assertSet('activeLevel', 'primary')
+            ->assertSet('primaryModal', true)
+            ->assertSet('secondaryModal', false)
+            ->assertSet('tertiaryModal', false);
+    });
+});
+
+// =============================================================================
+// Modal Lifecycle Tests
+// =============================================================================
+
+describe('Modal lifecycle', function () {
+    it('mounts once on component creation', function () {
+        Livewire::test(LifecycleModalComponent::class)
+            ->assertSet('mountCount', 1);
+    });
+
+    it('tracks updates when modal state changes', function () {
+        Livewire::test(LifecycleModalComponent::class)
+            ->assertSet('updateCount', 0)
+            ->call('openModal')
+            ->assertSet('updateCount', fn ($count) => $count > 0);
+    });
+
+    it('maintains state across multiple operations', function () {
+        Livewire::test(LifecycleModalComponent::class)
+            ->call('openModal')
+            ->assertSet('state', 'opened')
+            ->call('closeModal')
+            ->assertSet('state', 'closed')
+            ->call('openModal')
+            ->assertSet('state', 'opened');
+    });
+
+    it('mount is not called again when modal opens', function () {
+        Livewire::test(LifecycleModalComponent::class)
+            ->assertSet('mountCount', 1)
+            ->call('openModal')
+            ->assertSet('mountCount', 1) // Still 1
+            ->call('closeModal')
+            ->assertSet('mountCount', 1); // Still 1
+    });
+});
+
+// =============================================================================
+// Edge Cases and Boundary Tests
+// =============================================================================
+
+describe('Edge cases', function () {
+    it('handles rapid open/close cycles', function () {
+        $component = Livewire::test(BasicModalComponent::class);
+
+        for ($i = 0; $i < 10; $i++) {
+            $component->call('openModal')
+                ->assertSet('showModal', true)
+                ->call('closeModal')
+                ->assertSet('showModal', false);
+        }
+    });
+
+    it('handles multiple event dispatches in sequence', function () {
+        Livewire::test(EventModalComponent::class)
+            ->dispatch('open-modal')
+            ->dispatch('close-modal')
+            ->dispatch('open-modal')
+            ->dispatch('close-modal')
+            ->assertSet('receivedEvents', fn ($events) => count($events) === 4);
+    });
+
+    it('preserves computed properties when modal is open', function () {
+        $items = [['id' => 1], ['id' => 2]];
+
+        Livewire::test(DataModalComponent::class)
+            ->call('openWithItems', $items)
+            ->assertSet(fn ($component) => $component->itemCount === 2)
+            ->set('items', [...$items, ['id' => 3]])
+            ->assertSet(fn ($component) => $component->itemCount === 3);
+    });
+
+    it('handles closing already closed modal gracefully', function () {
+        Livewire::test(BasicModalComponent::class)
+            ->assertSet('showModal', false)
+            ->call('closeModal') // Already closed
+            ->assertSet('showModal', false); // Still closed, no error
+    });
+
+    it('handles opening already open modal gracefully', function () {
+        Livewire::test(BasicModalComponent::class)
+            ->call('openModal')
+            ->assertSet('showModal', true)
+            ->call('openModal') // Already open
+            ->assertSet('showModal', true); // Still open, no error
+    });
+
+    it('handles special characters in data', function () {
+        Livewire::test(DataModalComponent::class)
+            ->call('openWithData', 1, 'John "Jack" O\'Brien', 'test+special@example.co.uk')
+            ->assertSet('name', 'John "Jack" O\'Brien')
+            ->assertSet('email', 'test+special@example.co.uk');
+    });
+
+    it('handles unicode in data', function () {
+        Livewire::test(DataModalComponent::class)
+            ->call('openWithData', 1, "\xC3\x89mile Zola", "emile@caf\xC3\xA9.fr")
+            ->assertSet('name', "\xC3\x89mile Zola")
+            ->assertSet('email', "emile@caf\xC3\xA9.fr");
+    });
+
+    it('handles very long strings in data', function () {
+        $longName = str_repeat('A', 1000);
+        $longEmail = 'a'.str_repeat('b', 100).'@example.com';
+
+        Livewire::test(DataModalComponent::class)
+            ->call('openWithData', 1, $longName, $longEmail)
+            ->assertSet('name', $longName)
+            ->assertSet('email', $longEmail);
+    });
+});