diff --git a/src/lib/components/ExpandableForm.svelte b/src/lib/components/ExpandableForm.svelte
index 674440c..45b333e 100644
--- a/src/lib/components/ExpandableForm.svelte
+++ b/src/lib/components/ExpandableForm.svelte
@@ -19,7 +19,7 @@
   }
 </script>
 
-<div class="flex flex-col items-center">
+<div data-testid="expand-container" class="flex flex-col items-center">
   <!-- + / × button -->
   <button
     class="flex items-center justify-center w-12 h-12 rounded-full bg-blue-600 text-white text-2xl font-bold hover:bg-blue-700 transition"
diff --git a/tests/views/VorgangList.view.test.ts b/tests/views/VorgangList.view.test.ts
index 8349c2f..6e171fe 100644
--- a/tests/views/VorgangList.view.test.ts
+++ b/tests/views/VorgangList.view.test.ts
@@ -1,8 +1,10 @@
-import { render, screen, within } from '@testing-library/svelte';
-import { describe, expect, it } from 'vitest';
+import { render, fireEvent, screen, within } from '@testing-library/svelte';
+import { describe, expect, it, vi } from 'vitest';
 import VorgangListPage from '$root/routes/(angemeldet)/list/+page.svelte';
 import { baseData } from '../fixtures';
 import { ROUTE_NAMES } from '../../src/routes';
+import { actions } from '../../src/routes/(angemeldet)/list/+page.server';
+import { createVorgang } from '$lib/server/vorgangService';
 
 describe('Vorgänge Liste Page EmptyList-Komponente View', () => {
 	it('zeigt EmptyList-Komponente an, wenn Liste leer ist', () => {
@@ -43,3 +45,130 @@ describe('Teste Links auf Korrektheit', () => {
 		expect(linkElement.getAttribute('href')?.toLowerCase()).not.toContain('pin');
 	});
 });
+
+async function clickPlusButton() {
+	// mock animation features of the browser
+
+	window.HTMLElement.prototype.scrollIntoView = vi.fn();
+	window.HTMLElement.prototype.animate = vi.fn(() => ({
+		finished: Promise.resolve(),
+		cancel: vi.fn(),
+	}))
+
+	// button is visible
+	const button = screen.getByRole('button')
+	expect(button).toBeInTheDocument();
+
+	await fireEvent.click(button)
+}
+
+async function inputVorgang() {
+	const input = document.getElementById("vorgang");
+	input.value = 'test-vorgang';
+	// firing the event manually for Svelte
+	await fireEvent.input(input)
+
+	expect(input).toHaveValue('test-vorgang');
+}
+
+async function inputVorgangPIN() {
+	const input = document.getElementById("pin");
+	input.value = 'test-pin';
+	// firing the event manually for Svelte
+	await fireEvent.input(input)
+
+	expect(input).toHaveValue('test-pin');
+}
+
+
+describe('Hinzufügen Buton', () => {
+	it('Unexpandierter Button', () => {
+		const testData = { ...baseData, vorgangList: [] };
+		const { getByTestId } = render(VorgangListPage, { props: { data: testData } });
+
+		const container = getByTestId('expand-container')
+		expect(container).toBeInTheDocument();
+
+		// button is visible
+		const button = within(container).getByRole('button')
+		expect(button).toBeInTheDocument();
+
+		// input fields are not visible
+		let label = screen.queryByText('Vorgangsname');
+		expect(label).not.toBeInTheDocument();
+	});
+
+	it('Expandierter Button nach Klick', async () => {
+
+		const testData = { ...baseData, vorgangList: [] };
+		render(VorgangListPage, { props: { data: testData } });
+
+		await clickPlusButton()
+
+		// input fields are visible
+		let label = screen.queryByText('Vorgangsname');
+		expect(label).toBeInTheDocument();
+	});
+
+	it('Check Validation: missing PIN', async () => {
+
+		const testData = { ...baseData, vorgangList: [] };
+		render(VorgangListPage, { props: { data: testData } });
+
+		await clickPlusButton()
+
+		// input
+		inputVorgang();
+
+		// submit
+		const button = screen.getByText('Neuen Vorgang hinzufügen')
+		expect(button).toBeInTheDocument()
+		await fireEvent.click(button);
+		const errorMsg = 'Bitte einen Vorgangs-PIN eingeben.';
+		let para = await screen.getByText(errorMsg);
+		expect(para).toBeInTheDocument();
+	});
+
+	it('Create Vorgang successful', async () => {
+
+		const testData = { ...baseData, vorgangList: [] };
+		render(VorgangListPage, { props: { data: testData } });
+
+		await clickPlusButton();
+
+		// input fields are visible
+		let label = screen.queryByText('Vorgangsname');
+		expect(label).toBeInTheDocument();
+
+		inputVorgang();
+		inputVorgangPIN();
+
+		// emulate button click
+		const button = screen.getByText('Neuen Vorgang hinzufügen');
+		expect(button).toBeInTheDocument();
+		await fireEvent.click(button);
+
+		// no error message
+		label = screen.queryByText('Bitte');
+		expect(label).not.toBeInTheDocument();
+	});
+
+	it('Test default action', async () => {
+		vi.mock('$lib/server/vorgangService', () => ({
+			createVorgang: vi.fn(),
+		}));
+
+		const formData = new FormData(); // no data as we are mocking createVorgang
+		const mockRequest = {
+			formData: vi.fn().mockResolvedValue(formData)
+		};
+		const event = {
+			request: mockRequest,
+		};
+
+		const testVorgangToken = 'c322f26f-8c5e-4cb9-94b3-b5433bf5109e'
+		vi.mocked(createVorgang).mockReturnValueOnce(testVorgangToken);
+		const result = await actions.default(event);
+		expect(result).toEqual({ token: testVorgangToken });
+	});
+});
\ No newline at end of file