diff --git a/.github/.codecov.yml b/.github/.codecov.yml
index b349265..83fbafc 100644
--- a/.github/.codecov.yml
+++ b/.github/.codecov.yml
@@ -25,6 +25,8 @@ ignore:
   - '**/*.spec.tsx'
   - '**/types.d.ts'
   - 'playwright.config.ts'
+  - 'assets/src/components/icons/**'
+  - 'assets/src/js/**.js'
 
 comment:
   layout: 'reach,diff,flags,files'
diff --git a/jest.config.js b/jest.config.js
index 41dd817..1450699 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -63,6 +63,10 @@ module.exports = {
 		'!assets/src/**/index.{js,tsx,jsx}',
 		// Exclude style files
 		'!assets/src/**/*.{css,scss}',
+		// Exclude static SVG icon components
+		'!assets/src/components/icons/**',
+		// Exclude the js files
+		'!assets/src/js/**.js',
 	],
 
 	// Coverage output directory
diff --git a/playwright.config.ts b/playwright.config.ts
index c077f81..19b4c98 100644
--- a/playwright.config.ts
+++ b/playwright.config.ts
@@ -22,6 +22,12 @@ const config = defineConfig( {
 	...baseConfig,
 	testDir: './tests/e2e',
 	outputDir: './tests/_output/e2e',
+	webServer: {
+		command: 'npm run wp-env:test start',
+		port: 8889,
+		timeout: 120000,
+		reuseExistingServer: true,
+	},
 } );
 
 export default config;
diff --git a/tests/e2e/settings/activation.spec.ts b/tests/e2e/settings/activation.spec.ts
new file mode 100644
index 0000000..7055eb0
--- /dev/null
+++ b/tests/e2e/settings/activation.spec.ts
@@ -0,0 +1,67 @@
+/**
+ * WordPress dependencies
+ */
+import { expect, test } from '@wordpress/e2e-test-utils-playwright';
+
+test.describe( 'plugin activation', () => {
+	test( 'should activate and deactivate the plugin', async ( {
+		admin,
+		page,
+	} ) => {
+		await admin.visitAdminPage( '/plugins.php' );
+
+		// Helper to dismiss the onboarding modal if present.
+		const dismissOnboardingModal = async () => {
+			const modal = page.locator( '#oneupdate-site-selection-modal' );
+			const backdrop = page.locator(
+				'body.oneupdate-site-selection-modal'
+			);
+
+			if ( await modal.isVisible() ) {
+				await modal.evaluate( ( el ) => {
+					el.remove();
+				} );
+			}
+
+			if ( await backdrop.isVisible() ) {
+				await backdrop.evaluate( ( el ) => {
+					el.classList.remove( 'oneupdate-site-selection-modal' );
+				} );
+			}
+		};
+
+		const pluginRow = page.locator(
+			'tr[data-plugin="oneupdate/oneupdate.php"]'
+		);
+		await expect( pluginRow ).toBeVisible();
+
+		// Dismiss modal before interacting with plugin row.
+		await dismissOnboardingModal();
+
+		const activateLink = pluginRow.locator( 'a', { hasText: 'Activate' } );
+
+		await Promise.all( [
+			page.waitForURL( /plugins.php/ ),
+			activateLink.click(),
+		] );
+
+		await expect(
+			pluginRow.locator( 'a', { hasText: 'Deactivate' } )
+		).toBeVisible( { timeout: 10000 } );
+
+		// Dismiss modal again after activation.
+		await dismissOnboardingModal();
+
+		const deactivateLink = pluginRow.locator( 'a', {
+			hasText: 'Deactivate',
+		} );
+		await Promise.all( [
+			page.waitForURL( /plugins.php/ ),
+			deactivateLink.click(),
+		] );
+
+		await expect(
+			pluginRow.locator( 'a', { hasText: 'Activate' } )
+		).toBeVisible( { timeout: 10000 } );
+	} );
+} );
diff --git a/tests/js/OnboardingPage.test.tsx b/tests/js/OnboardingPage.test.tsx
new file mode 100644
index 0000000..feab10f
--- /dev/null
+++ b/tests/js/OnboardingPage.test.tsx
@@ -0,0 +1,96 @@
+/**
+ * External dependencies
+ */
+import { fireEvent, render, screen, waitFor } from '@testing-library/react';
+/**
+ * WordPress dependencies
+ */
+import apiFetch from '@wordpress/api-fetch';
+
+import OnboardingScreen from '@/admin/onboarding/page';
+
+const mockedApiFetch = apiFetch as jest.MockedFunction< typeof apiFetch >;
+
+describe( 'OnboardingScreen', () => {
+	beforeEach( () => {
+		mockedApiFetch.mockReset();
+		window.OneUpdateOnboarding = {
+			nonce: 'onboarding-nonce',
+			site_type: '',
+			setup_url: '/wp-admin/admin.php?page=oneupdate-settings',
+		};
+	} );
+
+	it( 'loads the current site type from settings', async () => {
+		mockedApiFetch.mockResolvedValueOnce( {
+			oneupdate_site_type: 'brand-site',
+		} );
+
+		render( <OnboardingScreen /> );
+
+		await waitFor( () => {
+			expect( screen.getByLabelText( 'Site Type' ) ).toHaveValue(
+				'brand-site'
+			);
+		} );
+	} );
+
+	it( 'shows an error notice when loading fails', async () => {
+		mockedApiFetch.mockRejectedValueOnce( new Error( 'load failed' ) );
+
+		render( <OnboardingScreen /> );
+
+		// WordPress renders notices in both accessibility region and visible content
+		expect(
+			await screen.findAllByText( 'Error fetching site type.' )
+		).toHaveLength( 2 );
+	} );
+
+	it( 'saves the chosen site type and redirects to setup page', async () => {
+		mockedApiFetch.mockResolvedValueOnce( {} ).mockResolvedValueOnce( {
+			oneupdate_site_type: 'governing-site',
+		} );
+
+		render( <OnboardingScreen /> );
+
+		const selectControl = await screen.findByLabelText( 'Site Type' );
+		fireEvent.change( selectControl, {
+			target: { value: 'governing-site' },
+		} );
+
+		const submitButton = screen.getByRole( 'button', {
+			name: 'Select Current Site Type',
+		} );
+		fireEvent.click( submitButton );
+
+		await waitFor( () => {
+			expect( mockedApiFetch ).toHaveBeenLastCalledWith( {
+				path: '/wp/v2/settings',
+				method: 'POST',
+				data: { oneupdate_site_type: 'governing-site' },
+			} );
+		} );
+	} );
+
+	it( 'shows an error notice when saving fails', async () => {
+		mockedApiFetch
+			.mockResolvedValueOnce( {} )
+			.mockRejectedValueOnce( new Error( 'save failed' ) );
+
+		render( <OnboardingScreen /> );
+
+		const selectControl = await screen.findByLabelText( 'Site Type' );
+		fireEvent.change( selectControl, {
+			target: { value: 'brand-site' },
+		} );
+
+		const submitButton = screen.getByRole( 'button', {
+			name: 'Select Current Site Type',
+		} );
+		fireEvent.click( submitButton );
+
+		expect(
+			await screen.findAllByText( 'Error setting site type.' )
+		).toHaveLength( 2 );
+	} );
+} );
diff --git a/tests/js/SettingsPage.test.tsx b/tests/js/SettingsPage.test.tsx
new file mode 100644
index 0000000..8760c16
--- /dev/null
+++ b/tests/js/SettingsPage.test.tsx
@@ -0,0 +1,254 @@
+jest.mock( 'react', () => jest.requireActual( 'react' ) );
+jest.mock( '@wordpress/element', () =>
+	jest.requireActual( '@wordpress/element' )
+);
+/**
+ * External dependencies
+ */
+import { fireEvent, render, screen, waitFor } from '@testing-library/react';
+/**
+ * WordPress dependencies
+ */
+import apiFetch from '@wordpress/api-fetch';
+
+// Mock child components to isolate SettingsPage behavior
+jest.mock( '@/components/SiteTable', () => ( {
+	__esModule: true,
+	default: ( {
+		sites,
+		onEdit,
+		onDelete,
+		setFormData,
+		setShowModal,
+	}: {
+		sites: Array< any >;
+		onEdit: ( index: number ) => void;
+		onDelete: ( index: number | null ) => void;
+		setFormData: ( data: any ) => void;
+		setShowModal: ( show: boolean ) => void;
+	} ) => (
+		<div data-testid="site-table">
+			<span data-testid="site-count">{ sites.length }</span>
+			<button
+				type="button"
+				onClick={ () => {
+					onEdit( 0 );
+					setFormData( {
+						name: 'Edited Brand Site',
+						url: 'https://edited.example.com/',
+						api_key: 'edited-key',
+						gh_repo: 'org/repo-a',
+					} );
+				} }
+			>
+				Edit Site
+			</button>
+			<button type="button" onClick={ () => setShowModal( true ) }>
+				Open Modal
+			</button>
+			<button type="button" onClick={ () => onDelete( 0 ) }>
+				Delete Site
+			</button>
+		</div>
+	),
+} ) );
+
+jest.mock( '@/components/SiteModal', () => ( {
+	__esModule: true,
+	default: ( {
+		onSubmit,
+		onClose,
+	}: {
+		onSubmit: () => Promise< boolean >;
+		onClose: () => void;
+	} ) => (
+		<div data-testid="site-modal">
+			<button type="button" onClick={ () => void onSubmit() }>
+				Submit Modal
+			</button>
+			<button type="button" onClick={ onClose }>
+				Close Modal
+			</button>
+		</div>
+	),
+} ) );
+
+jest.mock( '@/components/SiteSettings', () => ( {
+	__esModule: true,
+	default: () => <div data-testid="site-settings">Brand Site Settings</div>,
+} ) );
+
+jest.mock( '@/components/GitHubRepoToken', () => ( {
+	__esModule: true,
+	default: () => <div data-testid="github-repo-token">GitHub Repo Token</div>,
+} ) );
+
+jest.mock( '@/components/S3Credentials', () => ( {
+	__esModule: true,
+	default: () => <div data-testid="s3-credentials">S3 Credentials</div>,
+} ) );
+
+import SettingsPage from '@/admin/settings/page';
+
+const mockedApiFetch = apiFetch as jest.MockedFunction< typeof apiFetch >;
+
+describe( 'SettingsPage', () => {
+	beforeEach( () => {
+		mockedApiFetch.mockReset();
+		window.OneUpdateSettings = {
+			...window.OneUpdateSettings,
+			siteType: 'governing-site',
+		};
+		document.body.className = '';
+		global.fetch = jest.fn().mockResolvedValue( {
+			ok: true,
+			json: () => Promise.resolve( { repos: [] } ),
+		} ) as typeof fetch;
+	} );
+
+	it( 'loads shared sites and renders the page structure for governing-site', async () => {
+		mockedApiFetch.mockResolvedValueOnce( {
+			shared_sites: [
+				{
+					name: 'Brand Site',
+					url: 'https://brand.example.com/',
+					api_key: 'key',
+					gh_repo: 'org/repo-a',
+				},
+			],
+		} );
+
+		render( <SettingsPage /> );
+
+		await waitFor( () => {
+			expect( screen.getByTestId( 'site-count' ) ).toHaveTextContent(
+				'1'
+			);
+		} );
+
+		expect( screen.getByTestId( 'github-repo-token' ) ).toBeInTheDocument();
+		expect( screen.getByTestId( 's3-credentials' ) ).toBeInTheDocument();
+		expect(
+			screen.queryByTestId( 'site-settings' )
+		).not.toBeInTheDocument();
+	} );
+
+	it( 'renders the page structure for brand-site', async () => {
+		window.OneUpdateSettings.siteType = 'brand-site';
+
+		let SettingsPageForBrand: any;
+		let isolatedApiFetch: any;
+		jest.isolateModules( () => {
+			SettingsPageForBrand = require( '@/admin/settings/page' ).default;
+			isolatedApiFetch = require( '@wordpress/api-fetch' ).default;
+		} );
+
+		isolatedApiFetch.mockResolvedValueOnce( {
+			shared_sites: [],
+		} );
+
+		render( <SettingsPageForBrand /> );
+
+		await waitFor( () => {
+			expect( screen.getByTestId( 'site-settings' ) ).toBeInTheDocument();
+		} );
+
+		expect( screen.queryByTestId( 'site-table' ) ).not.toBeInTheDocument();
+		expect(
+			screen.queryByTestId( 'github-repo-token' )
+		).not.toBeInTheDocument();
+		expect(
+			screen.queryByTestId( 's3-credentials' )
+		).not.toBeInTheDocument();
+	} );
+
+	it( 'shows an error notice when initial data load fails', async () => {
+		mockedApiFetch.mockRejectedValueOnce( new Error( 'load failed' ) );
+
+		render( <SettingsPage /> );
+
+		const noticeEls = await screen.findAllByText(
+			'Error fetching settings data.'
+		);
+		expect( noticeEls.length ).toBeGreaterThanOrEqual( 1 );
+	} );
+
+	it( 'saves site changes, triggers reload if it is the first site, and shows success notice', async () => {
+		mockedApiFetch
+			.mockResolvedValueOnce( { shared_sites: [] } )
+			.mockResolvedValueOnce( {
+				shared_sites: [
+					{
+						name: 'Brand Site',
+						url: 'https://brand.example.com/',
+						api_key: 'key',
+						gh_repo: 'org/repo-a',
+					},
+				],
+			} );
+
+		render( <SettingsPage /> );
+
+		fireEvent.click(
+			await screen.findByRole( 'button', { name: 'Open Modal' } )
+		);
+		fireEvent.click(
+			screen.getByRole( 'button', { name: 'Submit Modal' } )
+		);
+
+		await waitFor( () => {
+			expect( mockedApiFetch ).toHaveBeenLastCalledWith( {
+				path: '/oneupdate/v1/shared-sites',
+				method: 'POST',
+				data: {
+					sites_data: [
+						{
+							name: '',
+							url: '',
+							api_key: '',
+							gh_repo: '',
+						},
+					],
+				},
+			} );
+		} );
+
+		const successNotices = await screen.findAllByText(
+			'Brand Site saved successfully.'
+		);
+		expect( successNotices.length ).toBeGreaterThanOrEqual( 1 );
+	} );
+
+	it( 'deletes site and reloads if no sites are left', async () => {
+		mockedApiFetch
+			.mockResolvedValueOnce( {
+				shared_sites: [
+					{
+						name: 'Brand Site',
+						url: 'https://brand.example.com/',
+						api_key: 'key',
+						gh_repo: 'org/repo-a',
+					},
+				],
+			} )
+			.mockResolvedValueOnce( {
+				shared_sites: [],
+			} );
+
+		render( <SettingsPage /> );
+
+		await screen.findByTestId( 'site-table' );
+
+		fireEvent.click(
+			screen.getByRole( 'button', { name: 'Delete Site' } )
+		);
+
+		await waitFor( () => {
+			expect( mockedApiFetch ).toHaveBeenLastCalledWith( {
+				path: '/oneupdate/v1/shared-sites',
+				method: 'POST',
+				data: { sites_data: [] },
+			} );
+		} );
+	} );
+} );
diff --git a/tests/js/components/GitHubRepoToken.test.tsx b/tests/js/components/GitHubRepoToken.test.tsx
new file mode 100644
index 0000000..0fb9bf6
--- /dev/null
+++ b/tests/js/components/GitHubRepoToken.test.tsx
@@ -0,0 +1,205 @@
+/**
+ * External dependencies
+ */
+import { fireEvent, render, screen, waitFor } from '@testing-library/react';
+
+/**
+ * Internal dependencies
+ */
+import GitHubRepoToken from '@/components/GitHubRepoToken';
+
+describe( 'GitHubRepoToken', () => {
+	const setNoticeMock = jest.fn();
+	const fetchAllAvailableGitHubReposMock = jest.fn();
+
+	beforeEach( () => {
+		jest.clearAllMocks();
+	} );
+
+	it( 'fetches and displays the saved GitHub token on mount', async () => {
+		global.fetch = jest.fn().mockResolvedValue( {
+			ok: true,
+			json: () =>
+				Promise.resolve( { github_token: 'ghp_initial_token' } ),
+		} ) as typeof fetch;
+
+		render(
+			<GitHubRepoToken
+				setNotice={ setNoticeMock }
+				fetchAllAvailableGitHubRepos={
+					fetchAllAvailableGitHubReposMock
+				}
+			/>
+		);
+
+		expect( global.fetch ).toHaveBeenCalledWith(
+			expect.stringContaining( '/oneupdate/v1/github-token' ),
+			expect.objectContaining( { method: 'GET' } )
+		);
+
+		const tokenInput = await screen.findByLabelText(
+			/GitHub Personal Access Token/i
+		);
+		await waitFor( () => {
+			expect( tokenInput ).toHaveValue( 'ghp_initial_token' );
+		} );
+	} );
+
+	it( 'updates input value when typing', async () => {
+		global.fetch = jest.fn().mockResolvedValue( {
+			ok: true,
+			json: () => Promise.resolve( {} ),
+		} ) as typeof fetch;
+
+		render(
+			<GitHubRepoToken
+				setNotice={ setNoticeMock }
+				fetchAllAvailableGitHubRepos={
+					fetchAllAvailableGitHubReposMock
+				}
+			/>
+		);
+
+		const tokenInput = await screen.findByLabelText(
+			/GitHub Personal Access Token/i
+		);
+		fireEvent.change( tokenInput, { target: { value: 'ghp_new_token' } } );
+		expect( tokenInput ).toHaveValue( 'ghp_new_token' );
+	} );
+
+	it( 'shows success notice and calls fetchAllAvailableGitHubRepos when token is saved successfully', async () => {
+		global.fetch = jest
+			.fn()
+			.mockResolvedValueOnce( {
+				ok: true,
+				json: () => Promise.resolve( { github_token: '' } ),
+			} )
+			.mockResolvedValueOnce( {
+				ok: true,
+				json: () => Promise.resolve( { success: true } ),
+			} ) as typeof fetch;
+
+		render(
+			<GitHubRepoToken
+				setNotice={ setNoticeMock }
+				fetchAllAvailableGitHubRepos={
+					fetchAllAvailableGitHubReposMock
+				}
+			/>
+		);
+
+		const tokenInput = await screen.findByLabelText(
+			/GitHub Personal Access Token/i
+		);
+		fireEvent.change( tokenInput, {
+			target: { value: 'ghp_valid_token' },
+		} );
+
+		const saveButton = screen.getByRole( 'button', {
+			name: /Save GitHub Token/i,
+		} );
+		fireEvent.click( saveButton );
+
+		await waitFor( () => {
+			expect( global.fetch ).toHaveBeenLastCalledWith(
+				expect.stringContaining( '/oneupdate/v1/github-token' ),
+				expect.objectContaining( {
+					method: 'POST',
+					body: JSON.stringify( { token: 'ghp_valid_token' } ),
+				} )
+			);
+		} );
+
+		await waitFor( () => {
+			expect( setNoticeMock ).toHaveBeenCalledWith( {
+				type: 'success',
+				message: 'GitHub token saved successfully.',
+			} );
+		} );
+
+		expect( fetchAllAvailableGitHubReposMock ).toHaveBeenCalled();
+	} );
+
+	it( 'shows error notice when API returns status 400 or fails', async () => {
+		global.fetch = jest
+			.fn()
+			.mockResolvedValueOnce( {
+				ok: true,
+				json: () => Promise.resolve( { github_token: '' } ),
+			} )
+			.mockResolvedValueOnce( {
+				ok: false,
+				status: 400,
+				json: () => Promise.resolve( {} ),
+			} ) as typeof fetch;
+
+		render(
+			<GitHubRepoToken
+				setNotice={ setNoticeMock }
+				fetchAllAvailableGitHubRepos={
+					fetchAllAvailableGitHubReposMock
+				}
+			/>
+		);
+
+		const tokenInput = await screen.findByLabelText(
+			/GitHub Personal Access Token/i
+		);
+		fireEvent.change( tokenInput, { target: { value: 'invalid_token' } } );
+
+		const saveButton = screen.getByRole( 'button', {
+			name: /Save GitHub Token/i,
+		} );
+		fireEvent.click( saveButton );
+
+		await waitFor( () => {
+			expect( setNoticeMock ).toHaveBeenCalledWith( {
+				type: 'error',
+				message: 'Please enter valid GitHub PAT token.',
+			} );
+		} );
+	} );
+
+	it( 'shows error message returned from API response payload', async () => {
+		global.fetch = jest
+			.fn()
+			.mockResolvedValueOnce( {
+				ok: true,
+				json: () => Promise.resolve( { github_token: '' } ),
+			} )
+			.mockResolvedValueOnce( {
+				ok: true,
+				json: () =>
+					Promise.resolve( {
+						status: '400',
+						message: 'Custom PAT validation error.',
+					} ),
+			} ) as typeof fetch;
+
+		render(
+			<GitHubRepoToken
+				setNotice={ setNoticeMock }
+				fetchAllAvailableGitHubRepos={
+					fetchAllAvailableGitHubReposMock
+				}
+			/>
+		);
+
+		const tokenInput = await screen.findByLabelText(
+			/GitHub Personal Access Token/i
+		);
+		fireEvent.change( tokenInput, { target: { value: 'bad_token' } } );
+
+		const saveButton = screen.getByRole( 'button', {
+			name: /Save GitHub Token/i,
+		} );
+		fireEvent.click( saveButton );
+
+		await waitFor( () => {
+			expect( setNoticeMock ).toHaveBeenCalledWith( {
+				type: 'error',
+				message: 'Custom PAT validation error.',
+			} );
+		} );
+	} );
+} );
diff --git a/tests/js/components/PluginCard.test.tsx b/tests/js/components/PluginCard.test.tsx
new file mode 100644
index 0000000..a5ed30e
--- /dev/null
+++ b/tests/js/components/PluginCard.test.tsx
@@ -0,0 +1,186 @@
+/**
+ * External dependencies
+ */
+import { fireEvent, render, screen } from '@testing-library/react';
+/**
+ * Internal dependencies
+ */
+import PluginCard from '@/components/PluginCard';
+
+const mockPlugin = {
+	name: 'My Custom Plugin',
+	slug: 'my-custom-plugin',
+	version: '1.2.3',
+	short_description: 'This is a test description of the plugin.',
+	icons: {
+		'1x': 'https://example.com/icon.png',
+		default: 'https://example.com/icon-default.png',
+	},
+	versions: {
+		'1.0.0':
+			'https://downloads.wordpress.org/plugin/my-custom-plugin.1.0.0.zip',
+		'1.1.0':
+			'https://downloads.wordpress.org/plugin/my-custom-plugin.1.1.0.zip',
+		'1.2.0':
+			'https://downloads.wordpress.org/plugin/my-custom-plugin.1.2.0.zip',
+		'1.2.1':
+			'https://downloads.wordpress.org/plugin/my-custom-plugin.1.2.1.zip',
+		'1.2.2-beta':
+			'https://downloads.wordpress.org/plugin/my-custom-plugin.1.2.2-beta.zip',
+		'1.2.3':
+			'https://downloads.wordpress.org/plugin/my-custom-plugin.1.2.3.zip',
+		trunk: 'https://downloads.wordpress.org/plugin/my-custom-plugin.zip',
+	},
+};
+
+describe( 'PluginCard', () => {
+	const onSelectMock = jest.fn();
+	const onVersionChangeMock = jest.fn();
+
+	beforeEach( () => {
+		onSelectMock.mockReset();
+		onVersionChangeMock.mockReset();
+	} );
+
+	it( 'renders plugin details correctly when not selected', () => {
+		render(
+			<PluginCard
+				plugin={ mockPlugin }
+				selectedPlugin={ [] }
+				onSelect={ onSelectMock }
+				onVersionChange={ onVersionChangeMock }
+			/>
+		);
+
+		expect(
+			screen.getByRole( 'heading', { name: 'My Custom Plugin' } )
+		).toBeInTheDocument();
+		expect(
+			screen.getByText( 'This is a test description of the plugin.' )
+		).toBeInTheDocument();
+		expect( screen.getByText( 'v1.2.3' ) ).toBeInTheDocument();
+
+		const logo = screen.getByRole( 'img', { name: 'My Custom Plugin' } );
+		expect( logo ).toHaveAttribute( 'src', 'https://example.com/icon.png' );
+
+		const selectButton = screen.getByRole( 'button', {
+			name: 'Select Plugin',
+		} );
+		expect( selectButton ).toBeInTheDocument();
+		expect( screen.queryByLabelText( 'Version' ) ).not.toBeInTheDocument();
+	} );
+
+	it( 'renders selected state and version select dropdown when selected', () => {
+		const selectedPlugin = [
+			{
+				slug: 'my-custom-plugin',
+				version: '1.2.3',
+			},
+		];
+
+		render(
+			<PluginCard
+				plugin={ mockPlugin }
+				selectedPlugin={ selectedPlugin }
+				onSelect={ onSelectMock }
+				onVersionChange={ onVersionChangeMock }
+			/>
+		);
+
+		const selectedButton = screen.getByRole( 'button', {
+			name: 'Selected',
+		} );
+		expect( selectedButton ).toBeInTheDocument();
+
+		const versionSelect = screen.getByLabelText(
+			'Version'
+		) as HTMLSelectElement;
+		expect( versionSelect ).toBeInTheDocument();
+		expect( versionSelect.value ).toBe( '1.2.3' );
+
+		// Options should be the last 5 stable versions (1.2.3, 1.2.1, 1.2.0, 1.1.0, 1.0.0) in reverse.
+		// It should exclude '1.2.2-beta' and 'trunk'.
+		const options = Array.from( versionSelect.options ).map(
+			( opt ) => opt.value
+		);
+		expect( options ).toEqual( [
+			'1.2.3',
+			'1.2.1',
+			'1.2.0',
+			'1.1.0',
+			'1.0.0',
+		] );
+	} );
+
+	it( 'calls onSelect with version when clicked to select', () => {
+		render(
+			<PluginCard
+				plugin={ mockPlugin }
+				selectedPlugin={ [] }
+				onSelect={ onSelectMock }
+				onVersionChange={ onVersionChangeMock }
+			/>
+		);
+
+		const selectButton = screen.getByRole( 'button', {
+			name: 'Select Plugin',
+		} );
+		fireEvent.click( selectButton );
+
+		expect( onSelectMock ).toHaveBeenCalledWith(
+			'my-custom-plugin',
+			'1.2.3'
+		);
+	} );
+
+	it( 'calls onSelect with null when clicked to deselect', () => {
+		const selectedPlugin = [
+			{
+				slug: 'my-custom-plugin',
+				version: '1.2.3',
+			},
+		];
+
+		render(
+			<PluginCard
+				plugin={ mockPlugin }
+				selectedPlugin={ selectedPlugin }
+				onSelect={ onSelectMock }
+				onVersionChange={ onVersionChangeMock }
+			/>
+		);
+
+		const selectedButton = screen.getByRole( 'button', {
+			name: 'Selected',
+		} );
+		fireEvent.click( selectedButton );
+
+		expect( onSelectMock ).toHaveBeenCalledWith( 'my-custom-plugin', null );
+	} );
+
+	it( 'calls onVersionChange when a different version is selected', () => {
+		const selectedPlugin = [
+			{
+				slug: 'my-custom-plugin',
+				version: '1.2.3',
+			},
+		];
+
+		render(
+			<PluginCard
+				plugin={ mockPlugin }
+				selectedPlugin={ selectedPlugin }
+				onSelect={ onSelectMock }
+				onVersionChange={ onVersionChangeMock }
+			/>
+		);
+
+		const versionSelect = screen.getByLabelText( 'Version' );
+		fireEvent.change( versionSelect, { target: { value: '1.2.0' } } );
+
+		expect( onVersionChangeMock ).toHaveBeenCalledWith(
+			'my-custom-plugin',
+			'1.2.0'
+		);
+	} );
+} );
diff --git a/tests/js/components/PluginGrid.test.tsx b/tests/js/components/PluginGrid.test.tsx
new file mode 100644
index 0000000..5e68d4a
--- /dev/null
+++ b/tests/js/components/PluginGrid.test.tsx
@@ -0,0 +1,331 @@
+/**
+ * External dependencies
+ */
+import { fireEvent, render, screen, waitFor } from '@testing-library/react';
+
+// Initialize global object required by the component
+beforeAll( () => {
+	( window as any ).OneUpdatePlugins = {
+		restUrl: 'https://example.com/wp-json',
+		restNonce: 'nonce',
+		api_key: 'test-api-key',
+	};
+} );
+
+// Mock PluginCard to isolate grid integration tests
+jest.mock( '@/components/PluginCard', () => ( {
+	__esModule: true,
+	default: ( {
+		plugin,
+		selectedPlugin,
+		onSelect,
+		onVersionChange,
+	}: {
+		plugin: any;
+		selectedPlugin: Array< any >;
+		onSelect: ( slug: string, version: string | null ) => void;
+		onVersionChange: ( slug: string, version: string ) => void;
+	} ) => {
+		const isSelected = selectedPlugin.some(
+			( p ) => p.slug === plugin.slug
+		);
+		return (
+			<div data-testid={ `plugin-card-${ plugin.slug }` }>
+				<span>{ plugin.name }</span>
+				<span>{ isSelected ? 'Selected' : 'Not Selected' }</span>
+				<button
+					type="button"
+					onClick={ () =>
+						onSelect(
+							plugin.slug,
+							isSelected ? null : plugin.version
+						)
+					}
+				>
+					Toggle Select
+				</button>
+				<button
+					type="button"
+					onClick={ () => onVersionChange( plugin.slug, '1.1.0' ) }
+				>
+					Change Version
+				</button>
+			</div>
+		);
+	},
+} ) );
+
+import PluginGrid from '@/components/PluginGrid';
+
+describe( 'PluginGrid', () => {
+	const mockPluginsResponse = {
+		plugins: [
+			{
+				name: 'Plugin A',
+				slug: 'plugin-a',
+				version: '1.2.0',
+			},
+			{
+				name: 'Plugin B',
+				slug: 'plugin-b',
+				version: '2.0.0',
+			},
+		],
+		info: {
+			page: 1,
+			pages: 3,
+		},
+	};
+
+	const mockSharedSitesResponse = {
+		shared_sites: [
+			{
+				id: 'site-1',
+				name: 'Brand Site One',
+				url: 'https://brand1.example.com/',
+			},
+			{
+				id: 'site-2',
+				name: 'Brand Site Two',
+				url: 'https://brand2.example.com/',
+			},
+		],
+	};
+
+	let fetchSpy: jest.SpyInstance;
+
+	beforeEach( () => {
+		fetchSpy = jest
+			.spyOn( global, 'fetch' )
+			.mockImplementation( ( url ) => {
+				if (
+					typeof url === 'string' &&
+					url.includes( 'api.wordpress.org' )
+				) {
+					return Promise.resolve( {
+						ok: true,
+						json: () => Promise.resolve( mockPluginsResponse ),
+					} as any );
+				}
+				if (
+					typeof url === 'string' &&
+					url.includes( 'shared-sites' )
+				) {
+					return Promise.resolve( {
+						ok: true,
+						json: () => Promise.resolve( mockSharedSitesResponse ),
+					} as any );
+				}
+				if (
+					typeof url === 'string' &&
+					url.includes( 'apply-plugins' )
+				) {
+					return Promise.resolve( {
+						ok: true,
+						json: () =>
+							Promise.resolve( {
+								success: true,
+								created_prs: [
+									{
+										data: {
+											pr_url: 'https://github.com/org/repo/pull/1',
+										},
+									},
+								],
+							} ),
+					} as any );
+				}
+				return Promise.reject(
+					new Error( `Unhandled mock URL: ${ url }` )
+				);
+			} );
+	} );
+
+	afterEach( () => {
+		fetchSpy.mockRestore();
+	} );
+
+	it( 'loads plugins and shared sites on mount', async () => {
+		render( <PluginGrid /> );
+
+		// Should show loading spinner initially
+		expect( screen.getByText( 'Loading plugins…' ) ).toBeInTheDocument();
+
+		// Wait for plugins to render
+		await waitFor( () => {
+			expect(
+				screen.getByTestId( 'plugin-card-plugin-a' )
+			).toBeInTheDocument();
+		} );
+
+		expect(
+			screen.getByTestId( 'plugin-card-plugin-b' )
+		).toBeInTheDocument();
+		expect(
+			screen.queryByText( 'Loading plugins…' )
+		).not.toBeInTheDocument();
+
+		// Check fetch calls
+		expect( fetchSpy ).toHaveBeenCalledWith(
+			expect.stringContaining( 'query_plugins' )
+		);
+		expect( fetchSpy ).toHaveBeenCalledWith(
+			expect.stringContaining( 'shared-sites' ),
+			expect.any( Object )
+		);
+	} );
+
+	it( 'updates listings on search submission', async () => {
+		render( <PluginGrid /> );
+
+		await waitFor( () => {
+			expect(
+				screen.getByTestId( 'plugin-card-plugin-a' )
+			).toBeInTheDocument();
+		} );
+
+		const searchInput = screen.getByPlaceholderText( /Search plugins/i );
+		fireEvent.change( searchInput, { target: { value: 'custom-query' } } );
+
+		const searchButton = screen.getByRole( 'button', { name: 'Search' } );
+		fireEvent.click( searchButton );
+
+		await waitFor( () => {
+			expect( fetchSpy ).toHaveBeenLastCalledWith(
+				expect.stringContaining( 'search=custom-query' )
+			);
+		} );
+	} );
+
+	it( 'paginates plugin lists correctly', async () => {
+		render( <PluginGrid /> );
+
+		await waitFor( () => {
+			expect(
+				screen.getByTestId( 'plugin-card-plugin-a' )
+			).toBeInTheDocument();
+		} );
+
+		const nextButton = screen.getByRole( 'button', { name: 'Next' } );
+		fireEvent.click( nextButton );
+
+		await waitFor( () => {
+			expect( fetchSpy ).toHaveBeenLastCalledWith(
+				expect.stringContaining( 'page=2' )
+			);
+		} );
+
+		// Wait for loading to finish and page 2 plugins to render
+		await screen.findByTestId( 'plugin-card-plugin-a' );
+
+		const prevButton = screen.getByRole( 'button', { name: 'Previous' } );
+		fireEvent.click( prevButton );
+
+		await waitFor( () => {
+			expect( fetchSpy ).toHaveBeenLastCalledWith(
+				expect.stringContaining( 'page=1' )
+			);
+		} );
+	} );
+
+	it( 'displays error notice when fetching plugins fails', async () => {
+		fetchSpy.mockImplementationOnce( () =>
+			Promise.resolve( {
+				ok: false,
+			} as any )
+		);
+
+		render( <PluginGrid /> );
+
+		const errorNotice = await screen.findByText(
+			'Failed to fetch plugins.'
+		);
+		expect( errorNotice ).toBeInTheDocument();
+
+		const retryButton = screen.getByRole( 'button', { name: 'Try Again' } );
+		fireEvent.click( retryButton );
+
+		await waitFor( () => {
+			expect( fetchSpy ).toHaveBeenCalledTimes( 3 ); // 1 (fail) + 1 (shared sites) + 1 (retry)
+		} );
+	} );
+
+	it( 'manages plugin selections and applies them to selected sites', async () => {
+		render( <PluginGrid /> );
+
+		await waitFor( () => {
+			expect(
+				screen.getByTestId( 'plugin-card-plugin-a' )
+			).toBeInTheDocument();
+		} );
+
+		// Toggle select plugin-a
+		const toggleButton = screen.getAllByRole( 'button', {
+			name: 'Toggle Select',
+		} )[ 0 ];
+		fireEvent.click( toggleButton as HTMLElement );
+
+		// Confirm active selected count shows 1 plugin
+		expect(
+			screen.getByText( /1\s+plugin\s+selected/i )
+		).toBeInTheDocument();
+		const applyButton = screen.getByRole( 'button', {
+			name: 'Apply selected plugins',
+		} );
+		expect( applyButton ).toBeInTheDocument();
+
+		// Change version of plugin-a
+		const changeVersionBtn = screen.getAllByRole( 'button', {
+			name: 'Change Version',
+		} )[ 0 ];
+		fireEvent.click( changeVersionBtn as HTMLElement );
+
+		// Click Apply to open modal
+		fireEvent.click( applyButton );
+
+		// Verify apply modal opened
+		expect(
+			screen.getByRole( 'heading', { name: 'Apply Selected Plugins' } )
+		).toBeInTheDocument();
+
+		// Checkbox for Brand Site One
+		const siteOneCheckbox = screen.getByLabelText( 'Brand Site One' );
+		fireEvent.click( siteOneCheckbox );
+
+		// Click Apply in confirmation modal
+		const confirmApplyButton = screen.getByRole( 'button', {
+			name: 'Apply Plugins',
+		} );
+		fireEvent.click( confirmApplyButton );
+
+		await waitFor( () => {
+			expect( fetchSpy ).toHaveBeenLastCalledWith(
+				expect.stringContaining( 'apply-plugins' ),
+				expect.objectContaining( {
+					method: 'POST',
+					body: JSON.stringify( {
+						sites: [
+							{
+								id: 'site-1',
+								name: 'Brand Site One',
+								url: 'https://brand1.example.com/',
+							},
+						],
+						plugins: [
+							{
+								slug: 'plugin-a',
+								version: '1.1.0',
+							},
+						],
+					} ),
+				} )
+			);
+		} );
+
+		// Verify success notice is displayed
+		const successNotice = await screen.findAllByText(
+			/Plugins applied successfully. Please check the PR at: https:\/\/github.com\/org\/repo\/pull\/1/i
+		);
+		expect( successNotice.length ).toBeGreaterThanOrEqual( 1 );
+	} );
+} );
diff --git a/tests/js/components/PluginsSharing.test.tsx b/tests/js/components/PluginsSharing.test.tsx
new file mode 100644
index 0000000..1450a87
--- /dev/null
+++ b/tests/js/components/PluginsSharing.test.tsx
@@ -0,0 +1,479 @@
+/**
+ * External dependencies
+ */
+import { fireEvent, render, screen, waitFor } from '@testing-library/react';
+
+// Initialize global object required by the component
+beforeAll( () => {
+	( window as any ).OneUpdatePlugins = {
+		restUrl: 'https://example.com/wp-json',
+		restNonce: 'nonce',
+		api_key: 'test-api-key',
+	};
+} );
+
+jest.mock( '@wordpress/components', () => {
+	const actual = jest.requireActual( '@wordpress/components' );
+	return {
+		...actual,
+		CheckboxControl: ( props: any ) => {
+			return (
+				/* eslint-disable jsx-a11y/label-has-associated-control */
+				<label>
+					<input
+						type="checkbox"
+						checked={ props.checked }
+						onChange={ ( e ) =>
+							props.onChange && props.onChange( e.target.checked )
+						}
+						disabled={ props.disabled }
+					/>
+					{ typeof props.label === 'string' ? (
+						<span>{ props.label }</span>
+					) : (
+						props.label
+					) }
+				</label>
+			);
+		},
+	};
+} );
+
+import PluginsSharing from '@/components/PluginsSharing';
+
+describe( 'PluginsSharing', () => {
+	const mockPluginsResponse = {
+		plugins: [
+			{
+				name: 'SEO Plugin',
+				slug: 'seo-plugin',
+				version: '3.4.1',
+				short_description: 'Improve your search rankings.',
+				icons: {
+					'1x': 'https://example.com/seo.png',
+				},
+				versions: {
+					'3.4.1': 'zip-url-1',
+					'3.4.0': 'zip-url-2',
+					'3.3.0': 'zip-url-3',
+				},
+				author: 'SEO Team',
+			},
+		],
+		info: {
+			page: 1,
+			pages: 1,
+		},
+	};
+
+	const mockSharedSitesResponse = {
+		shared_sites: [
+			{
+				id: 'site-1',
+				name: 'Governed Site',
+				url: 'https://governed.example.com/',
+			},
+		],
+	};
+
+	let fetchSpy: jest.SpyInstance;
+
+	beforeEach( () => {
+		fetchSpy = jest
+			.spyOn( global, 'fetch' )
+			.mockImplementation( ( url ) => {
+				if (
+					typeof url === 'string' &&
+					url.includes( 'api.wordpress.org' )
+				) {
+					return Promise.resolve( {
+						ok: true,
+						json: () => Promise.resolve( mockPluginsResponse ),
+					} as any );
+				}
+				if (
+					typeof url === 'string' &&
+					url.includes( 'shared-sites' )
+				) {
+					return Promise.resolve( {
+						ok: true,
+						json: () => Promise.resolve( mockSharedSitesResponse ),
+					} as any );
+				}
+				if (
+					typeof url === 'string' &&
+					url.includes( 'apply-plugins' )
+				) {
+					return Promise.resolve( {
+						ok: true,
+						json: () =>
+							Promise.resolve( {
+								success: true,
+								created_prs: [
+									{
+										name: 'Governed Site',
+										run_url:
+											'https://github.com/org/repo/pull/1',
+									},
+								],
+							} ),
+					} as any );
+				}
+				return Promise.reject(
+					new Error( `Unhandled mock URL: ${ url }` )
+				);
+			} );
+	} );
+
+	afterEach( () => {
+		fetchSpy.mockRestore();
+	} );
+
+	it( 'renders search tip guidance initially and does not fetch plugins on mount', async () => {
+		render( <PluginsSharing /> );
+
+		// Tip text should be visible
+		expect(
+			screen.getByText( /Tip: Try searching for specific functionality/i )
+		).toBeInTheDocument();
+		expect(
+			screen.getByRole( 'button', { name: 'Search Plugins' } )
+		).toBeInTheDocument();
+
+		// Should NOT load plugins initially
+		expect( screen.queryByText( 'SEO Plugin' ) ).not.toBeInTheDocument();
+
+		// But shared sites data IS loaded on mount
+		expect( fetchSpy ).toHaveBeenCalledWith(
+			expect.stringContaining( 'shared-sites' ),
+			expect.any( Object )
+		);
+	} );
+
+	it( 'searches and installs selected plugins on brand sites', async () => {
+		render( <PluginsSharing /> );
+
+		// Search for plugin
+		const searchInput =
+			screen.getByPlaceholderText( /Search for plugins/i );
+		fireEvent.change( searchInput, { target: { value: 'seo' } } );
+
+		const searchButton = screen.getByRole( 'button', {
+			name: 'Search Plugins',
+		} );
+		fireEvent.click( searchButton );
+
+		// Should show search loading
+		expect( screen.getByText( 'Searching plugins…' ) ).toBeInTheDocument();
+
+		// Wait for search result cards to render
+		await waitFor( () => {
+			expect(
+				screen.getByRole( 'heading', { name: 'SEO Plugin' } )
+			).toBeInTheDocument();
+		} );
+		expect(
+			screen.queryByText( 'Searching plugins…' )
+		).not.toBeInTheDocument();
+
+		// Select the plugin
+		const selectButton = screen.getByRole( 'button', {
+			name: 'Select Plugin',
+		} );
+		fireEvent.click( selectButton );
+
+		// Verify apply button shows with selection count
+		expect(
+			screen.getByText( /1\s+plugin\s+selected/i )
+		).toBeInTheDocument();
+		const applyBtn = screen.getByRole( 'button', {
+			name: 'Install Selected Plugins',
+		} );
+		fireEvent.click( applyBtn );
+
+		// Modal should open
+		expect(
+			screen.getByRole( 'heading', { name: 'Install Selected Plugins' } )
+		).toBeInTheDocument();
+
+		// Select site row
+		const siteRow = screen.getByRole( 'button', {
+			name: /Governed Site/i,
+		} );
+		fireEvent.click( siteRow );
+
+		// Click Install Plugins button
+		const installButton = screen.getByRole( 'button', {
+			name: 'Install Plugins',
+		} );
+		fireEvent.click( installButton );
+
+		await waitFor( () => {
+			expect( fetchSpy ).toHaveBeenLastCalledWith(
+				expect.stringContaining( 'apply-plugins' ),
+				expect.objectContaining( {
+					method: 'POST',
+					body: JSON.stringify( {
+						sites: [
+							{
+								id: 'site-1',
+								name: 'Governed Site',
+								url: 'https://governed.example.com/',
+							},
+						],
+						plugins: [
+							{
+								slug: 'seo-plugin',
+								version: '3.4.1',
+							},
+						],
+						plugin_type: 'add_update',
+					} ),
+				} )
+			);
+		} );
+
+		// Verify success notice is displayed
+		const successNotice = await screen.findAllByText(
+			/Plugins applied successfully.*Governed Site.*https:\/\/github.com\/org\/repo\/pull\/1/i
+		);
+		expect( successNotice.length ).toBeGreaterThanOrEqual( 1 );
+	} );
+
+	it( 'handles search error state and supports retrying search', async () => {
+		render( <PluginsSharing /> );
+
+		// Search for plugin
+		const searchInput =
+			screen.getByPlaceholderText( /Search for plugins/i );
+		fireEvent.change( searchInput, { target: { value: 'error-query' } } );
+
+		const searchButton = screen.getByRole( 'button', {
+			name: 'Search Plugins',
+		} );
+
+		// Mock error response for plugin search
+		fetchSpy.mockImplementationOnce( ( url ) => {
+			if (
+				typeof url === 'string' &&
+				url.includes( 'api.wordpress.org' )
+			) {
+				return Promise.resolve( {
+					ok: false,
+				} as any );
+			}
+			return Promise.resolve( {
+				ok: true,
+				json: () => Promise.resolve( mockSharedSitesResponse ),
+			} as any );
+		} );
+
+		fireEvent.click( searchButton );
+
+		// Wait for error container
+		const errorTitle = await screen.findByText( 'Unable to load plugins' );
+		expect( errorTitle ).toBeInTheDocument();
+
+		const tryAgainButton = screen.getByRole( 'button', {
+			name: 'Try Again',
+		} );
+		fireEvent.click( tryAgainButton );
+
+		// Wait for search result cards to render on successful retry
+		await waitFor( () => {
+			expect(
+				screen.getByRole( 'heading', { name: 'SEO Plugin' } )
+			).toBeInTheDocument();
+		} );
+	} );
+
+	it( 'supports selecting custom versions from the plugin card dropdown', async () => {
+		render( <PluginsSharing /> );
+
+		// Search for plugin
+		const searchInput =
+			screen.getByPlaceholderText( /Search for plugins/i );
+		fireEvent.change( searchInput, { target: { value: 'seo' } } );
+		const searchButton = screen.getByRole( 'button', {
+			name: 'Search Plugins',
+		} );
+		fireEvent.click( searchButton );
+
+		// Wait for card
+		await screen.findByRole( 'heading', { name: 'SEO Plugin' } );
+
+		// Select plugin first — the version dropdown only appears when selected
+		const selectButton = screen.getByRole( 'button', {
+			name: 'Select Plugin',
+		} );
+		fireEvent.click( selectButton );
+		expect(
+			screen.getByText( /1\s+plugin\s+selected/i )
+		).toBeInTheDocument();
+
+		// Now the version combobox should be visible
+		const combobox = screen.getByRole( 'combobox' );
+		fireEvent.change( combobox, { target: { value: '3.4.0' } } );
+
+		// Verify combobox selected value
+		expect( combobox ).toHaveValue( '3.4.0' );
+
+		// Deselect plugin by clicking the now-"Selected" button
+		fireEvent.click( screen.getByRole( 'button', { name: 'Selected' } ) );
+		expect(
+			screen.queryByText( /plugin\s+selected/i )
+		).not.toBeInTheDocument();
+	} );
+
+	it( 'renders empty state when no plugins match the query', async () => {
+		render( <PluginsSharing /> );
+
+		// Mock empty plugins response
+		fetchSpy.mockImplementationOnce( ( url ) => {
+			if (
+				typeof url === 'string' &&
+				url.includes( 'api.wordpress.org' )
+			) {
+				return Promise.resolve( {
+					ok: true,
+					json: () =>
+						Promise.resolve( {
+							plugins: [],
+							info: { page: 1, pages: 1 },
+						} ),
+				} as any );
+			}
+			return Promise.resolve( {
+				ok: true,
+				json: () => Promise.resolve( mockSharedSitesResponse ),
+			} as any );
+		} );
+
+		const searchInput =
+			screen.getByPlaceholderText( /Search for plugins/i );
+		fireEvent.change( searchInput, { target: { value: 'empty-query' } } );
+		const searchButton = screen.getByRole( 'button', {
+			name: 'Search Plugins',
+		} );
+		fireEvent.click( searchButton );
+
+		// Check empty notice
+		expect(
+			await screen.findByText( 'No plugins found' )
+		).toBeInTheDocument();
+
+		// Click Clear Search button
+		const clearBtn = screen.getByRole( 'button', { name: 'Clear Search' } );
+		fireEvent.click( clearBtn );
+		expect( searchInput ).toHaveValue( '' );
+	} );
+
+	it( 'displays error notice when apply-plugins API returns failure', async () => {
+		render( <PluginsSharing /> );
+
+		// Search and select plugin
+		const searchInput =
+			screen.getByPlaceholderText( /Search for plugins/i );
+		fireEvent.change( searchInput, { target: { value: 'seo' } } );
+		const searchButton = screen.getByRole( 'button', {
+			name: 'Search Plugins',
+		} );
+		fireEvent.click( searchButton );
+
+		await screen.findByRole( 'heading', { name: 'SEO Plugin' } );
+		fireEvent.click(
+			screen.getByRole( 'button', { name: 'Select Plugin' } )
+		);
+
+		// Open Modal
+		fireEvent.click(
+			screen.getByRole( 'button', { name: 'Install Selected Plugins' } )
+		);
+
+		// Click site row to select it
+		const siteRow = screen.getByRole( 'button', {
+			name: /Governed Site/i,
+		} );
+		fireEvent.click( siteRow );
+
+		// Mock failed apply response
+		fetchSpy.mockImplementation( ( url ) => {
+			if ( typeof url === 'string' && url.includes( 'apply-plugins' ) ) {
+				return Promise.resolve( {
+					ok: true,
+					json: () =>
+						Promise.resolve( {
+							success: false,
+							message: 'Invalid token',
+						} ),
+				} as any );
+			}
+			return Promise.resolve( {
+				ok: true,
+				json: () => Promise.resolve( mockSharedSitesResponse ),
+			} as any );
+		} );
+
+		// Install
+		fireEvent.click(
+			screen.getByRole( 'button', { name: 'Install Plugins' } )
+		);
+
+		// Verify error notice
+		const errorNotices = await screen.findAllByText(
+			'Failed to apply plugins. Please try again.'
+		);
+		expect( errorNotices.length ).toBeGreaterThanOrEqual( 1 );
+	} );
+
+	it( 'displays warning notice when no shared sites are available to install plugins', async () => {
+		// Mock empty shared-sites response before render so mount load catches it
+		fetchSpy.mockImplementation( ( url ) => {
+			if ( typeof url === 'string' && url.includes( 'shared-sites' ) ) {
+				return Promise.resolve( {
+					ok: true,
+					json: () => Promise.resolve( { shared_sites: [] } ),
+				} as any );
+			}
+			if (
+				typeof url === 'string' &&
+				url.includes( 'api.wordpress.org' )
+			) {
+				return Promise.resolve( {
+					ok: true,
+					json: () => Promise.resolve( mockPluginsResponse ),
+				} as any );
+			}
+			return Promise.resolve( {
+				ok: true,
+				json: () => Promise.resolve( {} ),
+			} as any );
+		} );
+
+		render( <PluginsSharing /> );
+
+		// Search and select plugin
+		const searchInput =
+			screen.getByPlaceholderText( /Search for plugins/i );
+		fireEvent.change( searchInput, { target: { value: 'seo' } } );
+		fireEvent.click(
+			screen.getByRole( 'button', { name: 'Search Plugins' } )
+		);
+
+		await screen.findByRole( 'heading', { name: 'SEO Plugin' } );
+		fireEvent.click(
+			screen.getByRole( 'button', { name: 'Select Plugin' } )
+		);
+
+		// Open Modal
+		fireEvent.click(
+			screen.getByRole( 'button', { name: 'Install Selected Plugins' } )
+		);
+
+		// Check empty sites notice (handling screen reader speak region duplicates)
+		const notices = await screen.findAllByText(
+			'No sites available to apply plugins.'
+		);
+		expect( notices.length ).toBeGreaterThanOrEqual( 1 );
+	} );
+} );
diff --git a/tests/js/components/S3Credentials.test.tsx b/tests/js/components/S3Credentials.test.tsx
new file mode 100644
index 0000000..0a7b533
--- /dev/null
+++ b/tests/js/components/S3Credentials.test.tsx
@@ -0,0 +1,215 @@
+/**
+ * External dependencies
+ */
+import { fireEvent, render, screen, waitFor } from '@testing-library/react';
+
+/**
+ * Internal dependencies
+ */
+import S3Credentials from '@/components/S3Credentials';
+
+describe( 'S3Credentials', () => {
+	const setNoticeMock = jest.fn();
+
+	beforeEach( () => {
+		jest.clearAllMocks();
+	} );
+
+	it( 'renders loading state and then credentials on mount', async () => {
+		global.fetch = jest.fn().mockResolvedValue( {
+			ok: true,
+			json: () =>
+				Promise.resolve( {
+					s3_credentials: {
+						accessKey: 'my-access-key',
+						secretKey: 'my-secret-key',
+						bucketName: 'my-bucket',
+						region: 'us-east-1',
+						endpoint: 'https://s3.amazonaws.com',
+					},
+				} ),
+		} ) as typeof fetch;
+
+		render( <S3Credentials setNotice={ setNoticeMock } /> );
+
+		// Verify initial loading message
+		expect( screen.getByText( /Loading…/i ) ).toBeInTheDocument();
+
+		// Wait for credentials to load and verify values are set
+		const bucketInput = await screen.findByLabelText( /Bucket Name/i );
+		expect( bucketInput ).toHaveValue( 'my-bucket' );
+		expect( screen.getByLabelText( /Region/i ) ).toHaveValue( 'us-east-1' );
+		expect( screen.getByLabelText( /Endpoint/i ) ).toHaveValue(
+			'https://s3.amazonaws.com'
+		);
+		expect( screen.getByLabelText( /Access Key/i ) ).toHaveValue(
+			'my-access-key'
+		);
+		expect( screen.getByLabelText( /Secret Key/i ) ).toHaveValue(
+			'my-secret-key'
+		);
+	} );
+
+	it( 'validates required fields before submitting', async () => {
+		global.fetch = jest.fn().mockResolvedValue( {
+			ok: true,
+			json: () => Promise.resolve( {} ),
+		} ) as typeof fetch;
+
+		render( <S3Credentials setNotice={ setNoticeMock } /> );
+
+		const bucketInput = await screen.findByLabelText( /Bucket Name/i );
+		fireEvent.change( bucketInput, { target: { value: 'my-bucket' } } );
+
+		const saveButton = screen.getByRole( 'button', {
+			name: /Save Credentials/i,
+		} );
+		fireEvent.click( saveButton );
+
+		await waitFor( () => {
+			expect( setNoticeMock ).toHaveBeenCalledWith( {
+				type: 'error',
+				message: 'All fields are required to save S3 credentials.',
+			} );
+		} );
+	} );
+
+	it( 'validates endpoint URL structure before submitting', async () => {
+		global.fetch = jest.fn().mockResolvedValue( {
+			ok: true,
+			json: () => Promise.resolve( {} ),
+		} ) as typeof fetch;
+
+		render( <S3Credentials setNotice={ setNoticeMock } /> );
+
+		const bucketInput = await screen.findByLabelText( /Bucket Name/i );
+		fireEvent.change( bucketInput, { target: { value: 'my-bucket' } } );
+		fireEvent.change( screen.getByLabelText( /Region/i ), {
+			target: { value: 'us-east-1' },
+		} );
+		fireEvent.change( screen.getByLabelText( /Endpoint/i ), {
+			target: { value: 'not-a-valid-url' },
+		} );
+		fireEvent.change( screen.getByLabelText( /Access Key/i ), {
+			target: { value: 'my-access-key' },
+		} );
+		fireEvent.change( screen.getByLabelText( /Secret Key/i ), {
+			target: { value: 'my-secret-key' },
+		} );
+
+		const saveButton = screen.getByRole( 'button', {
+			name: /Save Credentials/i,
+		} );
+		fireEvent.click( saveButton );
+
+		await waitFor( () => {
+			expect( setNoticeMock ).toHaveBeenCalledWith( {
+				type: 'error',
+				message: 'Please enter a valid URL for the S3 endpoint.',
+			} );
+		} );
+	} );
+
+	it( 'saves credentials successfully', async () => {
+		global.fetch = jest
+			.fn()
+			.mockResolvedValueOnce( {
+				ok: true,
+				json: () => Promise.resolve( {} ),
+			} )
+			.mockResolvedValueOnce( {
+				ok: true,
+				json: () => Promise.resolve( { success: true } ),
+			} ) as typeof fetch;
+
+		render( <S3Credentials setNotice={ setNoticeMock } /> );
+
+		const bucketInput = await screen.findByLabelText( /Bucket Name/i );
+		fireEvent.change( bucketInput, { target: { value: 'my-bucket' } } );
+		fireEvent.change( screen.getByLabelText( /Region/i ), {
+			target: { value: 'us-east-1' },
+		} );
+		fireEvent.change( screen.getByLabelText( /Endpoint/i ), {
+			target: { value: 'https://s3.example.com' },
+		} );
+		fireEvent.change( screen.getByLabelText( /Access Key/i ), {
+			target: { value: 'my-access-key' },
+		} );
+		fireEvent.change( screen.getByLabelText( /Secret Key/i ), {
+			target: { value: 'my-secret-key' },
+		} );
+
+		const saveButton = screen.getByRole( 'button', {
+			name: /Save Credentials/i,
+		} );
+		fireEvent.click( saveButton );
+
+		await waitFor( () => {
+			expect( global.fetch ).toHaveBeenLastCalledWith(
+				expect.stringContaining( '/oneupdate/v1/s3-credentials' ),
+				expect.objectContaining( {
+					method: 'POST',
+					body: JSON.stringify( {
+						s3_credentials: {
+							accessKey: 'my-access-key',
+							secretKey: 'my-secret-key',
+							bucketName: 'my-bucket',
+							region: 'us-east-1',
+							endpoint: 'https://s3.example.com',
+						},
+					} ),
+				} )
+			);
+		} );
+
+		await waitFor( () => {
+			expect( setNoticeMock ).toHaveBeenCalledWith( {
+				type: 'success',
+				message: 'S3 credentials saved successfully.',
+			} );
+		} );
+	} );
+
+	it( 'shows error notice when S3 credentials save fails', async () => {
+		global.fetch = jest
+			.fn()
+			.mockResolvedValueOnce( {
+				ok: true,
+				json: () => Promise.resolve( {} ),
+			} )
+			.mockResolvedValueOnce( {
+				ok: false,
+				json: () => Promise.resolve( {} ),
+			} ) as typeof fetch;
+
+		render( <S3Credentials setNotice={ setNoticeMock } /> );
+
+		const bucketInput = await screen.findByLabelText( /Bucket Name/i );
+		fireEvent.change( bucketInput, { target: { value: 'my-bucket' } } );
+		fireEvent.change( screen.getByLabelText( /Region/i ), {
+			target: { value: 'us-east-1' },
+		} );
+		fireEvent.change( screen.getByLabelText( /Endpoint/i ), {
+			target: { value: 'https://s3.example.com' },
+		} );
+		fireEvent.change( screen.getByLabelText( /Access Key/i ), {
+			target: { value: 'my-access-key' },
+		} );
+		fireEvent.change( screen.getByLabelText( /Secret Key/i ), {
+			target: { value: 'my-secret-key' },
+		} );
+
+		const saveButton = screen.getByRole( 'button', {
+			name: /Save Credentials/i,
+		} );
+		fireEvent.click( saveButton );
+
+		await waitFor( () => {
+			expect( setNoticeMock ).toHaveBeenCalledWith( {
+				type: 'error',
+				message:
+					'Failed to save S3 credentials. Please try again later.',
+			} );
+		} );
+	} );
+} );
diff --git a/tests/js/components/S3ZipUploader.test.tsx b/tests/js/components/S3ZipUploader.test.tsx
new file mode 100644
index 0000000..645a018
--- /dev/null
+++ b/tests/js/components/S3ZipUploader.test.tsx
@@ -0,0 +1,550 @@
+/**
+ * External dependencies
+ */
+import { fireEvent, render, screen, waitFor } from '@testing-library/react';
+
+// Initialize global object required by the component
+beforeAll( () => {
+	( window as any ).OneUpdatePlugins = {
+		restUrl: 'https://example.com/wp-json',
+		restNonce: 'nonce',
+		api_key: 'test-api-key',
+	};
+} );
+
+// Mock apiFetch for loading upload history
+jest.mock( '@wordpress/api-fetch', () => ( {
+	__esModule: true,
+	default: jest.fn(),
+} ) );
+
+/**
+ * WordPress dependencies
+ */
+import apiFetch from '@wordpress/api-fetch';
+
+import S3ZipUploader from '@/components/S3ZipUploader';
+
+describe( 'S3ZipUploader', () => {
+	const mockHistoryData = [
+		{
+			file_name: 'Custom Woo Addon',
+			version: '2.1.0',
+			upload_time: new Date().toISOString(),
+			status: 'applied',
+			presigned_url:
+				'https://s3.amazonaws.com/bucket/custom-woo-addon.2.1.0.zip',
+		},
+	];
+
+	const mockSharedSitesResponse = {
+		shared_sites: [
+			{
+				id: 'site-a',
+				name: 'Shared Brand Site',
+				url: 'https://brand.example.com/',
+			},
+		],
+	};
+
+	let fetchSpy: jest.SpyInstance;
+
+	beforeEach( () => {
+		( apiFetch as jest.MockedFunction< typeof apiFetch > ).mockReset();
+		(
+			apiFetch as jest.MockedFunction< typeof apiFetch >
+		 ).mockResolvedValue( mockHistoryData );
+
+		fetchSpy = jest
+			.spyOn( global, 'fetch' )
+			.mockImplementation( ( url ) => {
+				if (
+					typeof url === 'string' &&
+					url.includes( 'shared-sites' )
+				) {
+					return Promise.resolve( {
+						ok: true,
+						json: () => Promise.resolve( mockSharedSitesResponse ),
+					} as any );
+				}
+				if ( typeof url === 'string' && url.includes( 'upload' ) ) {
+					return Promise.resolve( {
+						ok: true,
+						json: () =>
+							Promise.resolve( {
+								presigned_url:
+									'https://s3.amazonaws.com/bucket/uploaded.zip',
+							} ),
+					} as any );
+				}
+				if (
+					typeof url === 'string' &&
+					url.includes( 'apply-private-plugins' )
+				) {
+					return Promise.resolve( {
+						ok: true,
+						json: () =>
+							Promise.resolve( {
+								success: true,
+								results: [
+									{
+										name: 'Shared Brand Site',
+										run_url:
+											'https://github.com/org/repo/actions/runs/12345',
+									},
+								],
+							} ),
+					} as any );
+				}
+				if (
+					typeof url === 'string' &&
+					url.includes( 'apply-plugins' )
+				) {
+					return Promise.resolve( {
+						ok: true,
+						json: () =>
+							Promise.resolve( {
+								success: true,
+								results: [
+									{
+										name: 'Shared Brand Site',
+										run_url:
+											'https://github.com/org/repo/actions/runs/54321',
+									},
+								],
+							} ),
+					} as any );
+				}
+				return Promise.reject(
+					new Error( `Unhandled mock URL: ${ url }` )
+				);
+			} );
+	} );
+
+	afterEach( () => {
+		fetchSpy.mockRestore();
+	} );
+
+	it( 'renders S3ZipUploader upload box and history table on mount', async () => {
+		render( <S3ZipUploader /> );
+
+		// Check drop zone area renders
+		expect(
+			screen.getByText( /Upload Private Plugin/i )
+		).toBeInTheDocument();
+		expect(
+			screen.getByText( /Choose plugin zip file/i )
+		).toBeInTheDocument();
+
+		// Wait for history table to load from apiFetch
+		await waitFor( () => {
+			expect(
+				screen.getByText( 'Custom Woo Addon' )
+			).toBeInTheDocument();
+		} );
+
+		expect(
+			screen.getByRole( 'button', { name: 'Copy URL' } )
+		).toBeInTheDocument();
+	} );
+
+	it( 'handles S3 upload and apply workflow on selected file', async () => {
+		render( <S3ZipUploader /> );
+
+		// Wait for history table load
+		await screen.findByText( 'Custom Woo Addon' );
+
+		// Select a zip file
+		const fileInput = screen.getByTestId(
+			'form-file-upload-input'
+		) as HTMLInputElement;
+		const file = new File( [ 'dummy content' ], 'test-plugin.zip', {
+			type: 'application/zip',
+		} );
+		fireEvent.change( fileInput, { target: { files: [ file ] } } );
+
+		// Click Upload button to trigger site selection modal
+		const uploadBtn = screen.getByRole( 'button', {
+			name: 'Upload & Install Plugin',
+		} );
+		fireEvent.click( uploadBtn );
+
+		// Verify site selection modal opened
+		expect(
+			screen.getByRole( 'heading', {
+				name: 'Select Sites for Plugin Installation',
+			} )
+		).toBeInTheDocument();
+
+		// Select Brand Site row
+		const siteRow = screen.getByRole( 'button', {
+			name: /Shared Brand Site/i,
+		} );
+		fireEvent.click( siteRow );
+
+		// Confirm upload
+		const confirmBtn = screen.getByRole( 'button', {
+			name: 'Install Plugin',
+		} );
+		fireEvent.click( confirmBtn );
+
+		// Wait for upload fetch requests to run
+		await waitFor( () => {
+			expect( fetchSpy ).toHaveBeenCalledWith(
+				expect.stringContaining( 'upload' ),
+				expect.any( Object )
+			);
+		} );
+
+		await waitFor( () => {
+			expect( fetchSpy ).toHaveBeenLastCalledWith(
+				expect.stringContaining( 'apply-private-plugins' ),
+				expect.objectContaining( {
+					method: 'POST',
+					body: expect.stringContaining( 'uploaded.zip' ),
+				} )
+			);
+		} );
+
+		// Check success notification
+		const successNotice = await screen.findAllByText(
+			/Plugin uploaded and applied successfully.*Shared Brand Site.*https:\/\/github.com\/org\/repo\/actions\/runs\/12345/i
+		);
+		expect( successNotice.length ).toBeGreaterThanOrEqual( 1 );
+	} );
+
+	it( 'supports applying existing plugins in history via the modal wizard flow', async () => {
+		render( <S3ZipUploader /> );
+
+		// Wait for history load
+		await screen.findByText( 'Custom Woo Addon' );
+
+		// Click Apply Plugins wizard launcher button
+		const wizardLauncher = screen.getByRole( 'button', {
+			name: 'Install Plugins',
+		} );
+		fireEvent.click( wizardLauncher );
+
+		// Step 1: Plugin Selection Modal
+		expect(
+			screen.getByRole( 'heading', {
+				name: 'Select Plugins to Install',
+			} )
+		).toBeInTheDocument();
+
+		// Select the plugin wrapper button in history list
+		const pluginButton = screen.getByRole( 'button', {
+			name: /Custom Woo Addon/i,
+		} );
+		fireEvent.click( pluginButton );
+
+		// Next Step
+		const nextBtn = screen.getByRole( 'button', {
+			name: 'Next: Select Sites',
+		} );
+		fireEvent.click( nextBtn );
+
+		// Step 2: Site Selection Modal
+		expect(
+			screen.getByRole( 'heading', {
+				name: 'Select Sites for Installation',
+			} )
+		).toBeInTheDocument();
+
+		// Select site row
+		const siteRow = await screen.findByRole( 'button', {
+			name: /Shared Brand Site/i,
+		} );
+		fireEvent.click( siteRow );
+
+		// Click Install Plugins to trigger installation POST request
+		const installBtn = screen.getByRole( 'button', {
+			name: 'Install Plugins',
+		} );
+		fireEvent.click( installBtn );
+
+		await waitFor( () => {
+			expect( fetchSpy ).toHaveBeenCalledWith(
+				expect.stringContaining( 'apply-private-plugins' ),
+				expect.objectContaining( {
+					method: 'POST',
+					body: expect.stringContaining(
+						'custom-woo-addon.2.1.0.zip'
+					),
+				} )
+			);
+		} );
+
+		// Verify success notice in parent app
+		const successNotice = await screen.findAllByText(
+			/Plugins applied successfully.*Shared Brand Site.*https:\/\/github.com\/org\/repo\/actions\/runs\/12345/i
+		);
+		expect( successNotice.length ).toBeGreaterThanOrEqual( 1 );
+	} );
+
+	it( 'shows error notice when apply-private-plugins returns failure', async () => {
+		render( <S3ZipUploader /> );
+		await screen.findByText( 'Custom Woo Addon' );
+
+		// Open wizard
+		fireEvent.click(
+			screen.getByRole( 'button', { name: 'Install Plugins' } )
+		);
+
+		// Select plugin
+		fireEvent.click(
+			screen.getByRole( 'button', { name: /Custom Woo Addon/i } )
+		);
+
+		// Next step
+		fireEvent.click(
+			screen.getByRole( 'button', { name: 'Next: Select Sites' } )
+		);
+
+		// Select site
+		const siteRow = await screen.findByRole( 'button', {
+			name: /Shared Brand Site/i,
+		} );
+		fireEvent.click( siteRow );
+
+		// Mock failure response for apply
+		fetchSpy.mockImplementation( ( url ) => {
+			if (
+				typeof url === 'string' &&
+				url.includes( 'apply-private-plugins' )
+			) {
+				return Promise.resolve( {
+					ok: true,
+					json: () =>
+						Promise.resolve( {
+							success: false,
+							message: 'Token expired',
+						} ),
+				} as any );
+			}
+			if ( typeof url === 'string' && url.includes( 'shared-sites' ) ) {
+				return Promise.resolve( {
+					ok: true,
+					json: () => Promise.resolve( mockSharedSitesResponse ),
+				} as any );
+			}
+			return Promise.resolve( {
+				ok: true,
+				json: () => Promise.resolve( {} ),
+			} as any );
+		} );
+
+		// Install
+		fireEvent.click(
+			screen.getByRole( 'button', { name: 'Install Plugins' } )
+		);
+
+		// Verify error notice
+		const errorNotices = await screen.findAllByText(
+			/Failed to apply plugins:.*Token expired/i
+		);
+		expect( errorNotices.length ).toBeGreaterThanOrEqual( 1 );
+	} );
+
+	it( 'renders empty history state when no uploads exist', async () => {
+		// Mock empty history
+		(
+			apiFetch as jest.MockedFunction< typeof apiFetch >
+		 ).mockResolvedValue( [] );
+
+		render( <S3ZipUploader /> );
+
+		// Should still render the upload card
+		expect(
+			screen.getByText( /Upload Private Plugin/i )
+		).toBeInTheDocument();
+
+		// Should render empty history state
+		await waitFor( () => {
+			expect( screen.getByText( /No uploads yet/i ) ).toBeInTheDocument();
+		} );
+	} );
+
+	it( 'shows upload error when presigned URL fetch fails', async () => {
+		render( <S3ZipUploader /> );
+		await screen.findByText( 'Custom Woo Addon' );
+
+		// Select a zip file
+		const fileInput = screen.getByTestId(
+			'form-file-upload-input'
+		) as HTMLInputElement;
+		const file = new File( [ 'dummy content' ], 'bad-plugin.zip', {
+			type: 'application/zip',
+		} );
+		fireEvent.change( fileInput, { target: { files: [ file ] } } );
+
+		// Mock upload URL failure
+		fetchSpy.mockImplementation( ( url ) => {
+			if ( typeof url === 'string' && url.includes( 'upload' ) ) {
+				return Promise.reject( new Error( 'Network connection lost' ) );
+			}
+			if ( typeof url === 'string' && url.includes( 'shared-sites' ) ) {
+				return Promise.resolve( {
+					ok: true,
+					json: () => Promise.resolve( mockSharedSitesResponse ),
+				} as any );
+			}
+			return Promise.resolve( {
+				ok: true,
+				json: () => Promise.resolve( {} ),
+			} as any );
+		} );
+
+		// Click Upload button
+		fireEvent.click(
+			screen.getByRole( 'button', {
+				name: 'Upload & Install Plugin',
+			} )
+		);
+
+		// Verify site selection modal opened
+		expect(
+			screen.getByRole( 'heading', {
+				name: 'Select Sites for Plugin Installation',
+			} )
+		).toBeInTheDocument();
+
+		// Select site
+		const siteRow = screen.getByRole( 'button', {
+			name: /Shared Brand Site/i,
+		} );
+		fireEvent.click( siteRow );
+
+		// Confirm upload
+		fireEvent.click(
+			screen.getByRole( 'button', { name: 'Install Plugin' } )
+		);
+
+		// Verify error notice
+		const errorNotices = await screen.findAllByText(
+			/Upload failed:.*Network connection lost/i
+		);
+		expect( errorNotices.length ).toBeGreaterThanOrEqual( 1 );
+		// Click notice dismiss button to cover onRemove
+		const dismissBtn = document.querySelector(
+			'.components-notice__dismiss'
+		);
+		expect( dismissBtn ).toBeInTheDocument();
+		fireEvent.click( dismissBtn! );
+
+		// Verify notice is gone
+		expect(
+			document.querySelector( '.components-notice' )
+		).not.toBeInTheDocument();
+	} );
+
+	it( 'copies URL and shows Copied feedback on Copy URL button click', async () => {
+		render( <S3ZipUploader /> );
+		await screen.findByText( 'Custom Woo Addon' );
+
+		// Click Copy URL button
+		const copyBtn = screen.getByRole( 'button', { name: 'Copy URL' } );
+		fireEvent.click( copyBtn );
+
+		// Verify clipboard was called
+		expect( navigator.clipboard.writeText ).toHaveBeenCalledWith(
+			'https://s3.amazonaws.com/bucket/custom-woo-addon.2.1.0.zip'
+		);
+
+		// Verify button text changed to Copied
+		expect(
+			screen.getByRole( 'button', { name: 'Copied URL' } )
+		).toBeInTheDocument();
+	} );
+
+	it( 'shows selected file name after choosing a zip file', async () => {
+		render( <S3ZipUploader /> );
+		await screen.findByText( 'Custom Woo Addon' );
+
+		// Select a zip file
+		const fileInput = screen.getByTestId(
+			'form-file-upload-input'
+		) as HTMLInputElement;
+		const file = new File( [ 'dummy' ], 'my-plugin.zip', {
+			type: 'application/zip',
+		} );
+		fireEvent.change( fileInput, { target: { files: [ file ] } } );
+
+		// Verify file name is displayed
+		expect(
+			screen.getByText( /Selected file:.*my-plugin\.zip/i )
+		).toBeInTheDocument();
+
+		// Verify Upload button is now enabled
+		const uploadBtn = screen.getByRole( 'button', {
+			name: 'Upload & Install Plugin',
+		} );
+		expect( uploadBtn ).not.toBeDisabled();
+	} );
+
+	it( 'supports keyboard accessibility and bulk selection in the apply wizard modal', async () => {
+		render( <S3ZipUploader /> );
+		await screen.findByText( 'Custom Woo Addon' );
+
+		// Open apply plugins wizard modal
+		fireEvent.click(
+			screen.getByRole( 'button', { name: 'Install Plugins' } )
+		);
+
+		// Step 1: Plugin Selection Modal
+		expect(
+			screen.getByRole( 'heading', {
+				name: 'Select Plugins to Install',
+			} )
+		).toBeInTheDocument();
+
+		// Find the plugin row button (Custom Woo Addon)
+		const pluginButton = screen.getByRole( 'button', {
+			name: /Custom Woo Addon/i,
+		} );
+
+		// Press key 'Enter' on the plugin row button
+		fireEvent.keyDown( pluginButton, { key: 'Enter', code: 'Enter' } );
+
+		// Verify it got selected (Clear Selection button becomes enabled)
+		const clearBtn = screen.getByRole( 'button', {
+			name: 'Clear Selection',
+		} );
+		expect( clearBtn ).not.toBeDisabled();
+
+		// Click Clear Selection
+		fireEvent.click( clearBtn );
+		expect( clearBtn ).toBeDisabled();
+
+		// Toggle select all plugins checkbox
+		const selectAllCheckbox = screen.getByLabelText( 'Select All Plugins' );
+		fireEvent.click( selectAllCheckbox );
+		expect( clearBtn ).not.toBeDisabled();
+
+		// Click Next: Select Sites
+		fireEvent.click(
+			screen.getByRole( 'button', { name: 'Next: Select Sites' } )
+		);
+
+		// Step 2: Site Selection Modal
+		expect(
+			screen.getByRole( 'heading', {
+				name: 'Select Sites for Installation',
+			} )
+		).toBeInTheDocument();
+
+		// Find site row
+		const siteRow = await screen.findByRole( 'button', {
+			name: /Shared Brand Site/i,
+		} );
+
+		// Press key 'Enter' on the site row button
+		fireEvent.keyDown( siteRow, { key: 'Enter', code: 'Enter' } );
+
+		// Verify Install Plugins button is enabled (since site is selected)
+		const installBtn = screen.getByRole( 'button', {
+			name: 'Install Plugins',
+		} );
+		expect( installBtn ).not.toBeDisabled();
+	} );
+} );
diff --git a/tests/js/components/SiteModal.test.tsx b/tests/js/components/SiteModal.test.tsx
new file mode 100644
index 0000000..3ac2208
--- /dev/null
+++ b/tests/js/components/SiteModal.test.tsx
@@ -0,0 +1,222 @@
+/**
+ * External dependencies
+ */
+import { useState } from 'react';
+import { fireEvent, render, screen, waitFor } from '@testing-library/react';
+
+/**
+ * Internal dependencies
+ */
+import SiteModal from '@/components/SiteModal';
+import { defaultBrandSite } from '@/admin/settings/page';
+
+const baseFormData = {
+	...defaultBrandSite,
+	name: 'Brand Site',
+	url: 'https://brand.example.com',
+	api_key: 'secret-key',
+	gh_repo: 'org/repo-a',
+};
+
+const mockRepos = [
+	{
+		slug: 'org/repo-a',
+		url: 'https://github.com/org/repo-a',
+		name: 'repo-a',
+	},
+	{
+		slug: 'org/repo-b',
+		url: 'https://github.com/org/repo-b',
+		name: 'repo-b',
+	},
+];
+
+function SiteModalHarness( {
+	initialData = baseFormData,
+	editing = false,
+	sites = [],
+	originalData,
+	onSubmit = jest.fn().mockResolvedValue( true ),
+	onClose = jest.fn(),
+}: {
+	initialData?: typeof defaultBrandSite;
+	editing?: boolean;
+	sites?: Array< typeof defaultBrandSite >;
+	originalData?: typeof defaultBrandSite;
+	onSubmit?: jest.Mock< Promise< boolean >, [] >;
+	onClose?: jest.Mock< void, [] >;
+} ) {
+	const [ formData, setFormData ] = useState( initialData );
+
+	return (
+		<SiteModal
+			formData={ formData }
+			setFormData={ setFormData }
+			onSubmit={ onSubmit }
+			onClose={ onClose }
+			editing={ editing }
+			sites={ sites }
+			originalData={ originalData }
+			allGitHubRepos={ mockRepos }
+		/>
+	);
+}
+
+describe( 'SiteModal', () => {
+	beforeEach( () => {
+		jest.clearAllMocks();
+	} );
+
+	it( 'disables submit when editing without changes', () => {
+		render(
+			<SiteModalHarness
+				editing
+				initialData={ baseFormData }
+				originalData={ baseFormData }
+			/>
+		);
+
+		expect(
+			screen.getByRole( 'button', { name: /Update Site/i } )
+		).toBeDisabled();
+	} );
+
+	it( 'enables submit when editing with changes', () => {
+		render(
+			<SiteModalHarness
+				editing
+				initialData={ { ...baseFormData, name: 'Changed Name' } }
+				originalData={ baseFormData }
+			/>
+		);
+
+		expect(
+			screen.getByRole( 'button', { name: /Update Site/i } )
+		).toBeEnabled();
+	} );
+
+	it( 'shows validation feedback for invalid input', async () => {
+		render(
+			<SiteModalHarness
+				initialData={ {
+					name: 'A very long site name beyond twenty characters limit',
+					url: 'invalid-url',
+					api_key: 'secret-key',
+					gh_repo: 'org/repo-a',
+				} }
+			/>
+		);
+
+		const submitButton = screen.getByRole( 'button', {
+			name: /Add Site/i,
+		} );
+		fireEvent.click( submitButton );
+
+		// We check DOM directly since WordPress notices can render twice/or with a11y regions
+		await waitFor( () => {
+			const noticeEl = document.querySelector(
+				'.components-notice__content'
+			);
+			expect( noticeEl ).toBeInTheDocument();
+			expect( noticeEl?.textContent ).toContain(
+				'Site Name must be under 20 characters.'
+			);
+		} );
+	} );
+
+	it( 'prevents duplicate site urls after a successful health check', async () => {
+		const onSubmit = jest.fn().mockResolvedValue( true );
+		global.fetch = jest.fn().mockResolvedValue( {
+			json: jest.fn().mockResolvedValue( { success: true } ),
+		} ) as typeof fetch;
+
+		render(
+			<SiteModalHarness
+				onSubmit={ onSubmit }
+				sites={ [
+					{
+						name: 'Existing',
+						url: 'https://brand.example.com/',
+						api_key: 'existing-key',
+						gh_repo: 'org/repo-a',
+					},
+				] }
+			/>
+		);
+
+		const submitButton = screen.getByRole( 'button', {
+			name: /Add Site/i,
+		} );
+		fireEvent.click( submitButton );
+
+		await waitFor( () => {
+			const noticeEl = document.querySelector(
+				'.components-notice__content'
+			);
+			expect( noticeEl ).toBeInTheDocument();
+			expect( noticeEl?.textContent ).toContain(
+				'Site URL already exists. Please use a different URL.'
+			);
+		} );
+
+		expect( onSubmit ).not.toHaveBeenCalled();
+	} );
+
+	it( 'triggers onSubmit callback after successful health check', async () => {
+		const onSubmit = jest.fn().mockResolvedValue( true );
+		global.fetch = jest.fn().mockResolvedValue( {
+			json: jest.fn().mockResolvedValue( { success: true } ),
+		} ) as typeof fetch;
+
+		render( <SiteModalHarness onSubmit={ onSubmit } /> );
+
+		const submitButton = screen.getByRole( 'button', {
+			name: /Add Site/i,
+		} );
+		fireEvent.click( submitButton );
+
+		await waitFor( () => {
+			expect( global.fetch ).toHaveBeenCalledWith(
+				expect.stringContaining(
+					'https://brand.example.com/wp-json/oneupdate/v1/health-check'
+				),
+				expect.objectContaining( {
+					method: 'GET',
+					headers: expect.objectContaining( {
+						'X-OneUpdate-Token': 'secret-key',
+					} ),
+				} )
+			);
+		} );
+
+		await waitFor( () => {
+			expect( onSubmit ).toHaveBeenCalled();
+		} );
+	} );
+
+	it( 'shows error notice when health check fails', async () => {
+		const onSubmit = jest.fn();
+		global.fetch = jest.fn().mockResolvedValue( {
+			json: jest.fn().mockResolvedValue( { success: false } ),
+		} ) as typeof fetch;
+
+		render( <SiteModalHarness onSubmit={ onSubmit } /> );
+
+		const submitButton = screen.getByRole( 'button', {
+			name: /Add Site/i,
+		} );
+		fireEvent.click( submitButton );
+
+		await waitFor( () => {
+			const noticeEl = document.querySelector(
+				'.components-notice__content'
+			);
+			expect( noticeEl ).toBeInTheDocument();
+			expect( noticeEl?.textContent ).toContain(
+				"Health check failed, please verify API key and make sure there's no governing site connected."
+			);
+		} );
+
+		expect( onSubmit ).not.toHaveBeenCalled();
+	} );
+} );
diff --git a/tests/js/components/SiteSettings.test.tsx b/tests/js/components/SiteSettings.test.tsx
new file mode 100644
index 0000000..ba3c23b
--- /dev/null
+++ b/tests/js/components/SiteSettings.test.tsx
@@ -0,0 +1,212 @@
+/**
+ * External dependencies
+ */
+import {
+	fireEvent,
+	render,
+	screen,
+	waitFor,
+	within,
+} from '@testing-library/react';
+
+/**
+ * Internal dependencies
+ */
+import SiteSettings from '@/components/SiteSettings';
+
+describe( 'SiteSettings', () => {
+	beforeEach( () => {
+		jest.clearAllMocks();
+	} );
+
+	const setupFetchMock = ( {
+		secretKey = 'my-api-key',
+		governingSiteUrl = 'https://governing.com',
+		deleteSuccess = true,
+		postSecretKey = 'new-api-key',
+	} = {} ) => {
+		global.fetch = jest
+			.fn()
+			.mockImplementation( ( url: string, options?: RequestInit ) => {
+				if ( url.includes( '/secret-key' ) ) {
+					if ( options?.method === 'POST' ) {
+						return Promise.resolve( {
+							ok: true,
+							json: () =>
+								Promise.resolve( {
+									secret_key: postSecretKey,
+								} ),
+						} );
+					}
+					return Promise.resolve( {
+						ok: true,
+						json: () =>
+							Promise.resolve( { secret_key: secretKey } ),
+					} );
+				}
+				if ( url.includes( '/governing-site' ) ) {
+					if ( options?.method === 'DELETE' ) {
+						return Promise.resolve( {
+							ok: deleteSuccess,
+							json: () =>
+								Promise.resolve( { success: deleteSuccess } ),
+						} );
+					}
+					return Promise.resolve( {
+						ok: true,
+						json: () =>
+							Promise.resolve( {
+								governing_site_url: governingSiteUrl,
+							} ),
+					} );
+				}
+				return Promise.reject(
+					new Error( `Unhandled mock URL: ${ url }` )
+				);
+			} ) as typeof fetch;
+	};
+
+	it( 'renders loading spinner initially, then displays settings on mount', async () => {
+		setupFetchMock();
+
+		render( <SiteSettings /> );
+
+		// Wait for data load (buttons render after loading is false)
+		await screen.findByRole( 'button', { name: /Copy API Key/i } );
+
+		const apiKeyInput = document.querySelector( 'textarea' );
+		expect( apiKeyInput ).toHaveValue( 'my-api-key' );
+		expect( screen.getByLabelText( /Governing Site URL/i ) ).toHaveValue(
+			'https://governing.com'
+		);
+	} );
+
+	it( 'copies API key to clipboard', async () => {
+		const writeTextMock = jest.fn().mockResolvedValue( undefined );
+		Object.defineProperty( navigator, 'clipboard', {
+			value: { writeText: writeTextMock },
+			configurable: true,
+			writable: true,
+		} );
+
+		setupFetchMock( { secretKey: 'my-api-key', governingSiteUrl: '' } );
+
+		render( <SiteSettings /> );
+
+		const copyButton = await screen.findByRole( 'button', {
+			name: /Copy API Key/i,
+		} );
+		fireEvent.click( copyButton );
+
+		await waitFor( () => {
+			expect( writeTextMock ).toHaveBeenCalledWith( 'my-api-key' );
+		} );
+
+		// Verify success notice is displayed
+		await waitFor( () => {
+			const noticeEl = document.querySelector(
+				'.components-notice__content'
+			);
+			expect( noticeEl ).toBeInTheDocument();
+			expect( noticeEl?.textContent ).toContain(
+				'API key copied to clipboard.'
+			);
+		} );
+	} );
+
+	it( 'regenerates API Key on button click', async () => {
+		setupFetchMock( {
+			secretKey: 'old-api-key',
+			postSecretKey: 'new-api-key',
+			governingSiteUrl: '',
+		} );
+
+		render( <SiteSettings /> );
+
+		// Wait for data load
+		await screen.findByRole( 'button', { name: /Copy API Key/i } );
+
+		const apiKeyInput = document.querySelector( 'textarea' );
+		expect( apiKeyInput ).toHaveValue( 'old-api-key' );
+
+		const regenerateButton = screen.getByRole( 'button', {
+			name: /Regenerate API Key/i,
+		} );
+		fireEvent.click( regenerateButton );
+
+		await waitFor( () => {
+			expect( global.fetch ).toHaveBeenLastCalledWith(
+				expect.stringContaining( '/oneupdate/v1/secret-key' ),
+				expect.objectContaining( { method: 'POST' } )
+			);
+		} );
+
+		await waitFor( () => {
+			expect( apiKeyInput ).toHaveValue( 'new-api-key' );
+		} );
+
+		await waitFor( () => {
+			const noticeEl = document.querySelector(
+				'.components-notice__content'
+			);
+			expect( noticeEl ).toBeInTheDocument();
+			expect( noticeEl?.textContent ).toContain(
+				'API key regenerated successfully.'
+			);
+		} );
+	} );
+
+	it( 'shows disconnect governing site confirmation modal and deletes connection', async () => {
+		setupFetchMock( {
+			secretKey: 'my-api-key',
+			governingSiteUrl: 'https://governing.com',
+			deleteSuccess: true,
+		} );
+
+		render( <SiteSettings /> );
+
+		const disconnectButton = await screen.findByRole( 'button', {
+			name: /Disconnect Governing Site/i,
+		} );
+		fireEvent.click( disconnectButton );
+
+		// Confirm dialog is shown
+		const dialog = screen.getByRole( 'dialog', {
+			name: 'Disconnect Governing Site',
+		} );
+		expect(
+			within( dialog ).getByText(
+				/Are you sure you want to disconnect from the governing site?/i
+			)
+		).toBeInTheDocument();
+
+		// Click confirm Disconnect button inside dialog
+		const confirmDisconnect = within( dialog ).getByRole( 'button', {
+			name: /^Disconnect$/i,
+		} );
+		fireEvent.click( confirmDisconnect );
+
+		await waitFor( () => {
+			expect( global.fetch ).toHaveBeenLastCalledWith(
+				expect.stringContaining( '/oneupdate/v1/governing-site' ),
+				expect.objectContaining( { method: 'DELETE' } )
+			);
+		} );
+
+		// Verify notice and inputs updated
+		await waitFor( () => {
+			const noticeEl = document.querySelector(
+				'.components-notice__content'
+			);
+			expect( noticeEl ).toBeInTheDocument();
+			expect( noticeEl?.textContent ).toContain(
+				'Governing site disconnected successfully.'
+			);
+		} );
+
+		// Check that the input has been cleared
+		expect( screen.getByLabelText( /Governing Site URL/i ) ).toHaveValue(
+			''
+		);
+	} );
+} );
diff --git a/tests/js/components/SiteTable.test.tsx b/tests/js/components/SiteTable.test.tsx
new file mode 100644
index 0000000..c330922
--- /dev/null
+++ b/tests/js/components/SiteTable.test.tsx
@@ -0,0 +1,183 @@
+/**
+ * External dependencies
+ */
+import { fireEvent, render, screen, within } from '@testing-library/react';
+
+/**
+ * Internal dependencies
+ */
+import SiteTable from '@/components/SiteTable';
+import type { BrandSite } from '@/admin/settings/page';
+
+describe( 'SiteTable', () => {
+	const onEditMock = jest.fn();
+	const onDeleteMock = jest.fn();
+	const setFormDataMock = jest.fn();
+	const setShowModalMock = jest.fn();
+
+	const mockSites: BrandSite[] = [
+		{
+			name: 'Site A',
+			url: 'https://sitea.com',
+			api_key: 'apikeyabcdefghijklmn',
+			gh_repo: 'org/repo-a',
+		},
+		{
+			name: 'Site B',
+			url: 'https://siteb.com',
+			api_key: 'apikey1234567890',
+			gh_repo: 'org/repo-b',
+		},
+	];
+
+	beforeEach( () => {
+		jest.clearAllMocks();
+	} );
+
+	it( 'displays "No Brand Sites found." when sites list is empty', () => {
+		render(
+			<SiteTable
+				sites={ [] }
+				onEdit={ onEditMock }
+				onDelete={ onDeleteMock }
+				setFormData={ setFormDataMock }
+				setShowModal={ setShowModalMock }
+			/>
+		);
+
+		expect(
+			screen.getByText( /No Brand Sites found./i )
+		).toBeInTheDocument();
+	} );
+
+	it( 'renders sites list in a table', () => {
+		render(
+			<SiteTable
+				sites={ mockSites }
+				onEdit={ onEditMock }
+				onDelete={ onDeleteMock }
+				setFormData={ setFormDataMock }
+				setShowModal={ setShowModalMock }
+			/>
+		);
+
+		expect( screen.getByText( 'Site A' ) ).toBeInTheDocument();
+		expect( screen.getByText( 'https://sitea.com' ) ).toBeInTheDocument();
+		expect( screen.getByText( 'org/repo-a' ) ).toBeInTheDocument();
+		expect( screen.getByText( 'apikeyabcd...' ) ).toBeInTheDocument();
+
+		expect( screen.getByText( 'Site B' ) ).toBeInTheDocument();
+		expect( screen.getByText( 'https://siteb.com' ) ).toBeInTheDocument();
+		expect( screen.getByText( 'org/repo-b' ) ).toBeInTheDocument();
+		expect( screen.getByText( 'apikey1234...' ) ).toBeInTheDocument();
+	} );
+
+	it( 'opens site modal when Add Brand Site is clicked', () => {
+		render(
+			<SiteTable
+				sites={ mockSites }
+				onEdit={ onEditMock }
+				onDelete={ onDeleteMock }
+				setFormData={ setFormDataMock }
+				setShowModal={ setShowModalMock }
+			/>
+		);
+
+		const addButton = screen.getByRole( 'button', {
+			name: /Add Brand Site/i,
+		} );
+		fireEvent.click( addButton );
+
+		expect( setShowModalMock ).toHaveBeenCalledWith( true );
+	} );
+
+	it( 'calls callbacks on Edit button click', () => {
+		render(
+			<SiteTable
+				sites={ mockSites }
+				onEdit={ onEditMock }
+				onDelete={ onDeleteMock }
+				setFormData={ setFormDataMock }
+				setShowModal={ setShowModalMock }
+			/>
+		);
+
+		const editButtons = screen.getAllByRole( 'button', { name: /Edit/i } );
+		// Click edit for first site
+		fireEvent.click( editButtons[ 0 ] as HTMLElement );
+
+		expect( setFormDataMock ).toHaveBeenCalledWith( mockSites[ 0 ] );
+		expect( onEditMock ).toHaveBeenCalledWith( 0 );
+		expect( setShowModalMock ).toHaveBeenCalledWith( true );
+	} );
+
+	it( 'shows and cancels delete confirmation modal', () => {
+		render(
+			<SiteTable
+				sites={ mockSites }
+				onEdit={ onEditMock }
+				onDelete={ onDeleteMock }
+				setFormData={ setFormDataMock }
+				setShowModal={ setShowModalMock }
+			/>
+		);
+
+		const deleteButtons = screen.getAllByRole( 'button', {
+			name: /Delete/i,
+		} );
+		fireEvent.click( deleteButtons[ 0 ] as HTMLElement );
+
+		const dialog = screen.getByRole( 'dialog', {
+			name: 'Delete Brand Site',
+		} );
+		expect(
+			within( dialog ).getByText(
+				'Are you sure you want to delete this Brand Site? This action cannot be undone.'
+			)
+		).toBeInTheDocument();
+
+		// Click Cancel
+		const cancelButton = within( dialog ).getByRole( 'button', {
+			name: /Cancel/i,
+		} );
+		fireEvent.click( cancelButton );
+
+		// Confirm modal is closed
+		expect(
+			screen.queryByRole( 'dialog', { name: 'Delete Brand Site' } )
+		).not.toBeInTheDocument();
+		expect( onDeleteMock ).not.toHaveBeenCalled();
+	} );
+
+	it( 'shows delete modal and triggers onDelete callback upon confirming delete', () => {
+		render(
+			<SiteTable
+				sites={ mockSites }
+				onEdit={ onEditMock }
+				onDelete={ onDeleteMock }
+				setFormData={ setFormDataMock }
+				setShowModal={ setShowModalMock }
+			/>
+		);
+
+		const deleteButtons = screen.getAllByRole( 'button', {
+			name: /Delete/i,
+		} );
+		fireEvent.click( deleteButtons[ 1 ] as HTMLElement );
+
+		const dialog = screen.getByRole( 'dialog', {
+			name: 'Delete Brand Site',
+		} );
+
+		// Confirmation modal delete button
+		const confirmDeleteButton = within( dialog ).getByRole( 'button', {
+			name: /Delete/i,
+		} );
+		fireEvent.click( confirmDeleteButton );
+
+		expect( onDeleteMock ).toHaveBeenCalledWith( 1 );
+		expect(
+			screen.queryByRole( 'dialog', { name: 'Delete Brand Site' } )
+		).not.toBeInTheDocument();
+	} );
+} );
diff --git a/tests/js/setup.ts b/tests/js/setup.ts
index 6213698..bce8d0b 100644
--- a/tests/js/setup.ts
+++ b/tests/js/setup.ts
@@ -1,8 +1,12 @@
+/* eslint-disable no-console */
 /**
  * External dependencies
  */
 import '@testing-library/jest-dom';
 
+console.warn = jest.fn();
+console.error = jest.fn();
+
 const fetchMock = jest.fn<
 	ReturnType< typeof fetch >,
 	Parameters< typeof fetch >
diff --git a/tests/js/utils.test.ts b/tests/js/utils.test.ts
new file mode 100644
index 0000000..8252f03
--- /dev/null
+++ b/tests/js/utils.test.ts
@@ -0,0 +1,54 @@
+/**
+ * Internal dependencies
+ */
+/**
+ * External dependencies
+ */
+import { isURL, isValidUrl, PurifyElement } from '@/js/utils';
+
+describe( 'utils', () => {
+	describe( 'isURL', () => {
+		it( 'should return true for valid URLs', () => {
+			expect( isURL( 'https://example.com' ) ).toBe( true );
+			expect( isURL( 'http://localhost:3000/path?query=1' ) ).toBe(
+				true
+			);
+			expect( isURL( 'ftp://ftp.example.com' ) ).toBe( true );
+		} );
+
+		it( 'should return false for invalid URLs', () => {
+			expect( isURL( 'example.com' ) ).toBe( false );
+			expect( isURL( 'not-a-url' ) ).toBe( false );
+			expect( isURL( '' ) ).toBe( false );
+		} );
+	} );
+
+	describe( 'isValidUrl', () => {
+		it( 'should return true for valid URL string structures', () => {
+			expect( isValidUrl( 'https://example.com' ) ).toBe( true );
+			expect( isValidUrl( 'http://example.org/dir/file.html' ) ).toBe(
+				true
+			);
+		} );
+
+		it( 'should return false for invalid URL string structures', () => {
+			expect( isValidUrl( 'invalid-url' ) ).toBe( false );
+			expect( isValidUrl( '' ) ).toBe( false );
+		} );
+	} );
+
+	describe( 'PurifyElement', () => {
+		it( 'should strip HTML tags from input string', () => {
+			expect(
+				PurifyElement( '<p>Hello <strong>World</strong></p>' )
+			).toBe( 'Hello World' );
+			expect(
+				PurifyElement( '<script>alert("xss")</script>Safe Content' )
+			).toBe( 'Safe Content' );
+		} );
+
+		it( 'should return empty string when empty input is provided', () => {
+			expect( PurifyElement( '' ) ).toBe( '' );
+		} );
+	} );
+} );
diff --git a/tsconfig.json b/tsconfig.json
index df1894a..289418a 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -8,7 +8,8 @@
 		"paths": {
 			"@/*": [ "./assets/src/*" ]
 		},
-		"types": [ "jest", "node" ]
+		"types": [ "jest", "node" ],
+		"checkJs": false
 	},
 	"include": [
 		"**/*.d.ts",
@@ -16,7 +17,11 @@
 		"**/*.mjs",
 		"**/*.ts",
 		"**/*.tsx",
-		"**/*.json"
+		"**/*.json",
+		"assets/src/components/PluginCard.js",
+		"assets/src/components/PluginGrid.js",
+		"assets/src/components/PluginsSharing.js",
+		"assets/src/components/S3ZipUploader.js"
 	],
 	"exclude": [
 		"**/build/*",