diff --git a/core/src/components/login/LoginForm.cy.ts b/core/src/components/login/LoginForm.cy.ts
deleted file mode 100644
index 1b1aeda6306..00000000000
--- a/core/src/components/login/LoginForm.cy.ts
+++ /dev/null
@@ -1,76 +0,0 @@
-/**
- * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
- * SPDX-License-Identifier: AGPL-3.0-or-later
- */
-import LoginForm from './LoginForm.vue'
-
-describe('core: LoginForm', { testIsolation: true }, () => {
-	beforeEach(() => {
-		// Mock the required global state
-		cy.window().then(($window) => {
-			$window.OC = {
-				theme: {
-					name: 'J\'s cloud',
-				},
-				requestToken: 'request-token',
-			}
-		})
-	})
-
-	/**
-	 * Ensure that characters like ' are not double HTML escaped.
-	 * This was a bug in https://github.com/nextcloud/server/issues/34990
-	 */
-	it('does not double escape special characters in product name', () => {
-		cy.mount(LoginForm, {
-			propsData: {
-				username: 'test-user',
-			},
-		})
-
-		cy.get('h2').contains('J\'s cloud')
-	})
-
-	it('fills username from props into form', () => {
-		cy.mount(LoginForm, {
-			propsData: {
-				username: 'test-user',
-			},
-		})
-
-		cy.get('input[name="user"]')
-			.should('exist')
-			.and('have.attr', 'id', 'user')
-
-		cy.get('input[name="user"]')
-			.should('have.value', 'test-user')
-	})
-
-	it('clears password after timeout', () => {
-		// mock timeout of 5 seconds
-		cy.window().then(($window) => {
-			const state = $window.document.createElement('input')
-			state.type = 'hidden'
-			state.id = 'initial-state-core-loginTimeout'
-			state.value = btoa(JSON.stringify(5))
-			$window.document.body.appendChild(state)
-		})
-
-		// mount forms
-		cy.mount(LoginForm)
-
-		cy.get('input[name="password"]')
-			.should('exist')
-			.type('MyPassword')
-
-		cy.get('input[name="password"]')
-			.should('have.value', 'MyPassword')
-
-		// Wait for timeout
-		// eslint-disable-next-line cypress/no-unnecessary-waiting
-		cy.wait(5100)
-
-		cy.get('input[name="password"]')
-			.should('have.value', '')
-	})
-})
diff --git a/core/src/components/login/LoginForm.vue b/core/src/components/login/LoginForm.vue
index 962e7d5a8e2..546190b8c7d 100644
--- a/core/src/components/login/LoginForm.vue
+++ b/core/src/components/login/LoginForm.vue
@@ -194,10 +194,10 @@ export default {
 		}
 	},
 
-	data() {
+	data(props) {
 		return {
 			loading: false,
-			user: '',
+			user: props.username,
 			password: '',
 		}
 	},
@@ -262,7 +262,7 @@ export default {
 		},
 
 		emailEnabled() {
-			return this.emailStates ? this.emailStates.every((state) => state === '1') : 1
+			return this.emailStates.every((state) => state === '1')
 		},
 
 		loginText() {
@@ -286,7 +286,6 @@ export default {
 		if (this.username === '') {
 			this.$refs.user.$refs.inputField.$refs.input.focus()
 		} else {
-			this.user = this.username
 			this.$refs.password.$refs.inputField.$refs.input.focus()
 		}
 	},
diff --git a/core/src/tests/components/Login/LoginForm.spec.ts b/core/src/tests/components/Login/LoginForm.spec.ts
new file mode 100644
index 00000000000..105bda60634
--- /dev/null
+++ b/core/src/tests/components/Login/LoginForm.spec.ts
@@ -0,0 +1,102 @@
+/*!
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+import { cleanup, render } from '@testing-library/vue'
+import { afterAll, afterEach, beforeAll, beforeEach, describe, expect, it, vi } from 'vitest'
+import LoginForm from '../../../components/login/LoginForm.vue'
+
+describe('core: LoginForm', () => {
+	afterEach(cleanup)
+
+	beforeEach(() => {
+		// Mock the required global state
+		window.OC = {
+			theme: {
+				name: 'J\'s cloud',
+			},
+			requestToken: 'request-token',
+		}
+	})
+
+	/**
+	 * Ensure that characters like ' are not double HTML escaped.
+	 * This was a bug in https://github.com/nextcloud/server/issues/34990
+	 */
+	it('does not double escape special characters in product name', () => {
+		const page = render(LoginForm, {
+			props: {
+				username: 'test-user',
+			},
+		})
+
+		const heading = page.getByRole('heading', { level: 2 })
+		expect(heading.textContent).toContain('J\'s cloud')
+	})
+
+	it('offers email as login name by default', async () => {
+		const page = render(LoginForm)
+
+		const input = await page.findByRole('textbox', { name: /Account name or email/ })
+		expect(input).toBeInstanceOf(HTMLInputElement)
+	})
+
+	it('offers only account name if email is not enabled', async () => {
+		const page = render(LoginForm, {
+			propsData: {
+				emailStates: ['0', '1'],
+			},
+		})
+
+		await expect(async () => page.findByRole('textbox', { name: /Account name or email/ })).rejects.toThrow()
+		await expect(page.findByRole('textbox', { name: /Account name/ })).resolves.not.toThrow()
+	})
+
+	it('fills username from props into form', () => {
+		const page = render(LoginForm, {
+			props: {
+				username: 'test-user',
+			},
+		})
+
+		page.debug()
+
+		const input: HTMLInputElement = page.getByRole('textbox', { name: /Account name or email/ })
+		expect(input.id).toBe('user')
+		expect(input.name).toBe('user')
+		expect(input.value).toBe('test-user')
+	})
+
+	describe('', () => {
+		beforeAll(() => {
+			vi.useFakeTimers()
+			// mock timeout of 5 seconds
+			const state = document.createElement('input')
+			state.type = 'hidden'
+			state.id = 'initial-state-core-loginTimeout'
+			state.value = btoa(JSON.stringify(5))
+			document.body.appendChild(state)
+		})
+
+		afterAll(() => {
+			vi.useRealTimers()
+			document.querySelector('#initial-state-core-loginTimeout')?.remove()
+		})
+
+		it('clears password after timeout', () => {
+			// mount forms
+			const page = render(LoginForm)
+			const input: HTMLInputElement = page.getByLabelText('Password', { selector: 'input' })
+			input.dispatchEvent(new InputEvent('input', { data: 'MyPassword' }))
+
+			vi.advanceTimersByTime(2500)
+			// see its still the value
+			expect(input.value).toBe('')
+
+			// Wait for timeout
+			vi.advanceTimersByTime(2600)
+			expect(input.value).toBe('')
+		})
+	})
+})
diff --git a/eslint.config.mjs b/eslint.config.mjs
index 95f309bb331..1261a9738a7 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -63,6 +63,8 @@ export default defineConfig([
 		rules: {
 			'no-console': 'off',
 			'jsdoc/require-jsdoc': 'off',
+			'jsdoc/require-param-type': 'off',
+			'jsdoc/require-param-description': 'off',
 			'@typescript-eslint/no-explicit-any': 'off',
 			'@typescript-eslint/no-unused-expressions': 'off',
 		},
diff --git a/package-lock.json b/package-lock.json
index e92359f2ec8..3b05eb9487c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -104,7 +104,7 @@
         "@testing-library/cypress": "^10.1.0",
         "@testing-library/jest-dom": "^6.6.4",
         "@testing-library/user-event": "^14.6.1",
-        "@testing-library/vue": "^5.8.3",
+        "@testing-library/vue": "^5.9.0",
         "@types/dockerode": "^3.3.44",
         "@types/wait-on": "^5.3.4",
         "@vitejs/plugin-vue2": "^2.3.3",
diff --git a/package.json b/package.json
index f738844cd0b..0c8230fc25b 100644
--- a/package.json
+++ b/package.json
@@ -141,7 +141,7 @@
     "@testing-library/cypress": "^10.1.0",
     "@testing-library/jest-dom": "^6.6.4",
     "@testing-library/user-event": "^14.6.1",
-    "@testing-library/vue": "^5.8.3",
+    "@testing-library/vue": "^5.9.0",
     "@types/dockerode": "^3.3.44",
     "@types/wait-on": "^5.3.4",
     "@vitejs/plugin-vue2": "^2.3.3",