diff --git a/backend/src/main/java/org/raddatz/familienarchiv/user/InviteListItemDTO.java b/backend/src/main/java/org/raddatz/familienarchiv/user/InviteListItemDTO.java
index 4e0cd8a6..1355b0fe 100644
--- a/backend/src/main/java/org/raddatz/familienarchiv/user/InviteListItemDTO.java
+++ b/backend/src/main/java/org/raddatz/familienarchiv/user/InviteListItemDTO.java
@@ -31,5 +31,6 @@ public class InviteListItemDTO {
     private String status;
     @Schema(requiredMode = Schema.RequiredMode.REQUIRED)
     private LocalDateTime createdAt;
+    @Schema(requiredMode = Schema.RequiredMode.REQUIRED)
     private String shareableUrl;
 }
diff --git a/frontend/src/routes/admin/invites/+page.server.ts b/frontend/src/routes/admin/invites/+page.server.ts
index 3746c264..e006716a 100644
--- a/frontend/src/routes/admin/invites/+page.server.ts
+++ b/frontend/src/routes/admin/invites/+page.server.ts
@@ -20,8 +20,14 @@ export interface InviteListItem {
 }
 export type UserGroup = components['schemas']['UserGroup'];
 
+const VALID_STATUSES = ['ACTIVE', 'REVOKED', 'EXPIRED'] as const;
+type InviteStatus = (typeof VALID_STATUSES)[number];
+
 export const load: PageServerLoad = async ({ url, fetch }) => {
-	const status = url.searchParams.get('status') ?? 'active';
+	const rawStatus = url.searchParams.get('status');
+	const status: InviteStatus | 'active' = VALID_STATUSES.includes(rawStatus as InviteStatus)
+		? (rawStatus as InviteStatus)
+		: 'active';
 	const api = createApiClient(fetch);
 
 	const [invitesResult, groupsResult] = await Promise.all([
diff --git a/frontend/src/routes/admin/invites/page.server.test.ts b/frontend/src/routes/admin/invites/page.server.spec.ts
similarity index 100%
rename from frontend/src/routes/admin/invites/page.server.test.ts
rename to frontend/src/routes/admin/invites/page.server.spec.ts
diff --git a/frontend/src/routes/admin/users/[id]/page.server.spec.ts b/frontend/src/routes/admin/users/[id]/page.server.spec.ts
new file mode 100644
index 00000000..78f04823
--- /dev/null
+++ b/frontend/src/routes/admin/users/[id]/page.server.spec.ts
@@ -0,0 +1,198 @@
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+
+vi.mock('$env/dynamic/private', () => ({
+	env: { API_INTERNAL_URL: 'http://localhost:8080' }
+}));
+
+vi.mock('$lib/shared/api.server', () => ({ createApiClient: vi.fn() }));
+
+import { load, actions } from './+page.server';
+import { createApiClient } from '$lib/shared/api.server';
+
+function mockApi(methods: Partial<Record<'GET' | 'PUT' | 'DELETE', ReturnType<typeof vi.fn>>>) {
+	vi.mocked(createApiClient).mockReturnValue(methods as ReturnType<typeof createApiClient>);
+}
+
+// ─── load() ──────────────────────────────────────────────────────────────────
+
+describe('admin/users/[id] load()', () => {
+	beforeEach(() => vi.clearAllMocks());
+
+	function makeEvent(permissions: string[] = ['ADMIN']) {
+		return {
+			params: { id: 'user-123' },
+			fetch: vi.fn() as unknown as typeof fetch,
+			locals: { user: { groups: [{ permissions }] } },
+			request: new Request('http://localhost/admin/users/user-123'),
+			url: new URL('http://localhost/admin/users/user-123')
+			// eslint-disable-next-line @typescript-eslint/no-explicit-any
+		} as any;
+	}
+
+	it('throws 403 when the user lacks the ADMIN permission', async () => {
+		let thrown: unknown;
+		try {
+			await load(makeEvent(['READ_ALL']));
+		} catch (e) {
+			thrown = e;
+		}
+
+		expect((thrown as { status: number }).status).toBe(403);
+	});
+
+	it('throws 404 when the backend returns non-ok for the user lookup', async () => {
+		const mockGet = vi
+			.fn()
+			.mockResolvedValueOnce({ response: { ok: false, status: 404 }, data: undefined })
+			.mockResolvedValueOnce({ response: { ok: true }, data: [] });
+		mockApi({ GET: mockGet });
+
+		let thrown: unknown;
+		try {
+			await load(makeEvent());
+		} catch (e) {
+			thrown = e;
+		}
+
+		expect((thrown as { status: number }).status).toBe(404);
+	});
+
+	it('returns editUser and groups on success', async () => {
+		const editUser = { id: 'user-123', email: 'max@example.com', firstName: 'Max' };
+		const groups = [
+			{ id: 'g-1', name: 'Familie', permissions: ['READ_ALL'] },
+			{ id: 'g-2', name: 'Administratoren', permissions: ['ADMIN'] }
+		];
+		const mockGet = vi
+			.fn()
+			.mockResolvedValueOnce({ response: { ok: true }, data: editUser })
+			.mockResolvedValueOnce({ response: { ok: true }, data: groups });
+		mockApi({ GET: mockGet });
+
+		const result = await load(makeEvent());
+
+		expect(result).toMatchObject({
+			editUser: expect.objectContaining({ id: 'user-123' }),
+			groups: expect.arrayContaining([expect.objectContaining({ id: 'g-1' })])
+		});
+	});
+});
+
+// ─── update action ────────────────────────────────────────────────────────────
+
+describe('admin/users/[id] update action', () => {
+	beforeEach(() => vi.clearAllMocks());
+
+	function makeUpdateRequest(fields: Record<string, string | string[]> = {}) {
+		const fd = new FormData();
+		const defaults: Record<string, string> = {
+			firstName: 'Max',
+			lastName: 'Mustermann',
+			email: 'max@example.com'
+		};
+		for (const [k, v] of Object.entries({ ...defaults, ...fields })) {
+			if (Array.isArray(v)) {
+				v.forEach((item) => fd.append(k, item));
+			} else {
+				fd.append(k, v);
+			}
+		}
+		return new Request('http://localhost', { method: 'POST', body: fd });
+	}
+
+	function makeEvent(request: Request) {
+		return {
+			params: { id: 'user-123' },
+			request,
+			fetch: vi.fn() as unknown as typeof fetch
+			// eslint-disable-next-line @typescript-eslint/no-explicit-any
+		} as any;
+	}
+
+	it('calls PUT /api/users/{id} and returns success: true on 200', async () => {
+		const mockPut = vi.fn().mockResolvedValue({ response: { ok: true, status: 200 }, data: {} });
+		mockApi({ PUT: mockPut });
+
+		const result = await actions.update(makeEvent(makeUpdateRequest()));
+
+		expect(mockPut).toHaveBeenCalledWith(
+			'/api/users/{id}',
+			expect.objectContaining({ params: { path: { id: 'user-123' } } })
+		);
+		expect(result).toEqual({ success: true });
+	});
+
+	it('returns fail with backend error code when PUT returns non-OK', async () => {
+		const mockPut = vi
+			.fn()
+			.mockResolvedValue({ response: { ok: false, status: 403 }, error: { code: 'FORBIDDEN' } });
+		mockApi({ PUT: mockPut });
+
+		const result = await actions.update(makeEvent(makeUpdateRequest()));
+
+		expect(result).toMatchObject({ status: 403 });
+	});
+
+	it('returns fail with generic message when error body has no code field', async () => {
+		const mockPut = vi
+			.fn()
+			.mockResolvedValue({ response: { ok: false, status: 500 }, error: null });
+		mockApi({ PUT: mockPut });
+
+		const result = await actions.update(makeEvent(makeUpdateRequest()));
+
+		expect(result).toMatchObject({ status: 500 });
+	});
+
+	it('returns fail without calling backend when passwords do not match', async () => {
+		const mockPut = vi.fn();
+		mockApi({ PUT: mockPut });
+
+		const result = await actions.update(
+			makeEvent(makeUpdateRequest({ newPassword: 'abc', confirmPassword: 'xyz' }))
+		);
+
+		expect(mockPut).not.toHaveBeenCalled();
+		expect(result).toMatchObject({ status: 400 });
+	});
+});
+
+// ─── delete action ────────────────────────────────────────────────────────────
+
+describe('admin/users/[id] delete action', () => {
+	beforeEach(() => vi.clearAllMocks());
+
+	function makeEvent() {
+		return {
+			params: { id: 'user-123' },
+			fetch: vi.fn() as unknown as typeof fetch
+			// eslint-disable-next-line @typescript-eslint/no-explicit-any
+		} as any;
+	}
+
+	it('redirects to /admin/users on successful delete', async () => {
+		const mockDelete = vi.fn().mockResolvedValue({ response: { ok: true } });
+		mockApi({ DELETE: mockDelete });
+
+		let redirectLocation: string | null = null;
+		try {
+			await actions.delete(makeEvent());
+		} catch (e: unknown) {
+			const r = e as { location?: string };
+			redirectLocation = r.location ?? null;
+		}
+
+		expect(redirectLocation).toBe('/admin/users');
+	});
+
+	it('returns fail when delete returns non-OK', async () => {
+		const mockDelete = vi
+			.fn()
+			.mockResolvedValue({ response: { ok: false, status: 403 }, error: { code: 'FORBIDDEN' } });
+		mockApi({ DELETE: mockDelete });
+
+		const result = await actions.delete(makeEvent());
+
+		expect(result).toMatchObject({ status: 403 });
+	});
+});
diff --git a/frontend/src/routes/admin/users/[id]/page.server.test.ts b/frontend/src/routes/admin/users/[id]/page.server.test.ts
deleted file mode 100644
index 373e4ace..00000000
--- a/frontend/src/routes/admin/users/[id]/page.server.test.ts
+++ /dev/null
@@ -1,110 +0,0 @@
-import { describe, it, expect, vi, beforeEach } from 'vitest';
-
-vi.mock('$env/dynamic/private', () => ({
-	env: { API_INTERNAL_URL: 'http://localhost:8080' }
-}));
-
-import { actions } from './+page.server';
-
-// eslint-disable-next-line @typescript-eslint/no-explicit-any
-type AnyFetch = (...args: any[]) => any;
-
-function mockResponse(ok: boolean, body: unknown, status = 200) {
-	return {
-		ok,
-		status,
-		json: async () => body,
-		text: async () => JSON.stringify(body),
-		headers: new Headers({ 'content-type': 'application/json' })
-	} as unknown as Response;
-}
-
-function makeUpdateRequest(fields: Record<string, string | string[]> = {}) {
-	const fd = new FormData();
-	const defaults: Record<string, string> = {
-		firstName: 'Max',
-		lastName: 'Mustermann',
-		email: 'max@example.com'
-	};
-	for (const [k, v] of Object.entries({ ...defaults, ...fields })) {
-		if (Array.isArray(v)) {
-			v.forEach((item) => fd.append(k, item));
-		} else {
-			fd.append(k, v);
-		}
-	}
-	return new Request('http://localhost', { method: 'POST', body: fd });
-}
-
-describe('admin/users/[id] update action', () => {
-	const mockFetch = vi.fn<AnyFetch>();
-
-	beforeEach(() => mockFetch.mockReset());
-
-	it('calls PUT /api/users/{id} via createApiClient (Request object)', async () => {
-		mockFetch.mockResolvedValueOnce(mockResponse(true, {}, 200));
-
-		await actions.update({
-			params: { id: 'user-123' },
-			request: makeUpdateRequest(),
-			fetch: mockFetch as unknown as typeof fetch
-			// eslint-disable-next-line @typescript-eslint/no-explicit-any
-		} as any);
-
-		const [req] = mockFetch.mock.calls[0] as [Request, unknown];
-		expect(req).toBeInstanceOf(Request);
-		expect(req.url).toContain('/api/users/user-123');
-		expect(req.method).toBe('PUT');
-	});
-
-	it('returns success: true when PUT responds with 200', async () => {
-		mockFetch.mockResolvedValueOnce(mockResponse(true, {}, 200));
-
-		const result = await actions.update({
-			params: { id: 'user-123' },
-			request: makeUpdateRequest(),
-			fetch: mockFetch as unknown as typeof fetch
-			// eslint-disable-next-line @typescript-eslint/no-explicit-any
-		} as any);
-
-		expect(result).toEqual({ success: true });
-	});
-
-	it('returns fail with backend error code when PUT returns non-OK', async () => {
-		mockFetch.mockResolvedValueOnce(mockResponse(false, { code: 'FORBIDDEN' }, 403));
-
-		const result = await actions.update({
-			params: { id: 'user-123' },
-			request: makeUpdateRequest(),
-			fetch: mockFetch as unknown as typeof fetch
-			// eslint-disable-next-line @typescript-eslint/no-explicit-any
-		} as any);
-
-		expect(result).toMatchObject({ status: 403 });
-	});
-
-	it('returns fail with generic message when error body has no code field', async () => {
-		mockFetch.mockResolvedValueOnce(mockResponse(false, { message: 'internal server error' }, 500));
-
-		const result = await actions.update({
-			params: { id: 'user-123' },
-			request: makeUpdateRequest(),
-			fetch: mockFetch as unknown as typeof fetch
-			// eslint-disable-next-line @typescript-eslint/no-explicit-any
-		} as any);
-
-		expect(result).toMatchObject({ status: 500 });
-	});
-
-	it('returns fail without calling backend when passwords do not match', async () => {
-		const result = await actions.update({
-			params: { id: 'user-123' },
-			request: makeUpdateRequest({ newPassword: 'abc', confirmPassword: 'xyz' }),
-			fetch: mockFetch as unknown as typeof fetch
-			// eslint-disable-next-line @typescript-eslint/no-explicit-any
-		} as any);
-
-		expect(mockFetch).not.toHaveBeenCalled();
-		expect(result).toMatchObject({ status: 400 });
-	});
-});