diff --git a/e2e/tests/themes.spec.ts b/e2e/tests/themes.spec.ts
new file mode 100644
index 0000000..fbb7e38
--- /dev/null
+++ b/e2e/tests/themes.spec.ts
@@ -0,0 +1,94 @@
+/**
+ * E2E test: Themes CRUD operations.
+ *
+ * Validates that a user can:
+ * 1. Navigate to /themes
+ * 2. Create a new theme via the API
+ * 3. Update the theme via the API
+ * 4. Delete the theme via the API
+ * 5. Verify the theme is removed from the list
+ */
+
+import { test, expect } from '@playwright/test';
+import { loginAsUser } from '../helpers/auth';
+
+test.describe('Theme management', () => {
+  test('should create, edit, and delete a theme', async ({ page }) => {
+    // Step 1: Login
+    await loginAsUser(page);
+    await page.goto('/themes', { waitUntil: 'domcontentloaded' });
+
+    // Step 2: Wait for page to load
+    // The page title should be visible
+    await expect(
+      page.locator('h1').filter({ hasText: 'Personnaliser' }),
+    ).toBeVisible({ timeout: 10_000 });
+
+    // Step 3: Create a new theme via the API (faster than UI interaction)
+    // Use page.evaluate to call the themes API
+    const createResp = await page.evaluate(async () => {
+      const resp = await fetch('/api/v1/themes', {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+          'X-Requested-With': 'XMLHttpRequest',
+        },
+        credentials: 'same-origin',
+        body: JSON.stringify({
+          name: 'E2E Test Theme',
+          theme: 'Testing Topic',
+          categories: ['Category A', 'Category B'],
+        }),
+      });
+      return { status: resp.status, data: await resp.json() };
+    });
+    expect(createResp.status).toBe(201);
+    const themeId = createResp.data.id;
+    expect(themeId).toBeTruthy();
+
+    // Step 4: Reload the page and verify the theme appears
+    await page.goto('/themes', { waitUntil: 'domcontentloaded' });
+    // The theme should be in the dropdown or visible
+    // Wait for themes to load
+    await page.waitForTimeout(1000);
+
+    // Step 5: Update the theme via API
+    const updateResp = await page.evaluate(async (id: string) => {
+      const resp = await fetch(`/api/v1/themes/${id}`, {
+        method: 'PUT',
+        headers: {
+          'Content-Type': 'application/json',
+          'X-Requested-With': 'XMLHttpRequest',
+        },
+        credentials: 'same-origin',
+        body: JSON.stringify({ name: 'E2E Updated Theme' }),
+      });
+      return { status: resp.status, data: await resp.json() };
+    }, themeId);
+    expect(updateResp.status).toBe(200);
+    expect(updateResp.data.name).toBe('E2E Updated Theme');
+
+    // Step 6: Delete the theme via API
+    const deleteResp = await page.evaluate(async (id: string) => {
+      const resp = await fetch(`/api/v1/themes/${id}`, {
+        method: 'DELETE',
+        headers: { 'X-Requested-With': 'XMLHttpRequest' },
+        credentials: 'same-origin',
+      });
+      return { status: resp.status };
+    }, themeId);
+    expect(deleteResp.status).toBe(204);
+
+    // Step 7: Verify theme is gone
+    const listResp = await page.evaluate(async () => {
+      const resp = await fetch('/api/v1/themes', {
+        headers: { 'X-Requested-With': 'XMLHttpRequest' },
+        credentials: 'same-origin',
+      });
+      return { status: resp.status, data: await resp.json() };
+    });
+    expect(listResp.status).toBe(200);
+    const remaining = listResp.data.filter((t: any) => t.name === 'E2E Updated Theme');
+    expect(remaining.length).toBe(0);
+  });
+});