diff --git a/cypress/e2e/openreadonly.spec.js b/cypress/e2e/openreadonly.spec.js
new file mode 100644
index 00000000000..fe5c9907cb9
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+++ b/cypress/e2e/openreadonly.spec.js
@@ -0,0 +1,104 @@
+import { User } from '@nextcloud/cypress'
+import { randUser } from '../utils/index.js'
+
+const admin = new User('admin', 'admin')
+const user = randUser()
+
+describe('Open read-only mode', function () {
+
+	const setReadOnlyMode = function (mode) {
+		cy.login(admin)
+		cy.ocsRequest({
+			method: 'POST',
+			url: 'http://localhost/ocs/v2.php/apps/testing/api/v1/app/text/open_read_only_enabled',
+			body: { value: mode }
+		}).then(response => {
+			cy.log(response.status)
+		})
+		cy.logout()
+	}
+
+	describe('Disabled', function () {
+		const checkMenubar = function () {
+			cy.get('.text-editor--readonly-bar').should('not.exist')
+			cy.get('.text-menubar').getActionEntry('done').should('not.exist')
+		}
+
+		beforeEach(function () {
+			setReadOnlyMode(0)
+
+			cy.createUser(user)
+			cy.login(user)
+
+			cy.uploadFile('test.md', 'text/markdown')
+			cy.uploadFile('test.md', 'text/markdown', 'test.txt')
+
+			cy.visit('/apps/files')
+		})
+
+		it('Test writable markdown file', function () {
+			cy.openFile('test.md')
+			checkMenubar()
+		})
+
+		it('Test writable text file', function () {
+			cy.openFile('test.txt')
+			checkMenubar()
+		})
+	})
+
+	describe('Enabled', function () {
+		const requireReadOnlyBar = function () {
+			cy.get('.text-editor--readonly-bar').should('exist')
+			cy.get('.text-editor--readonly-bar').getActionEntry('edit').should('exist')
+		}
+
+		const requireMenubar = function () {
+			cy.get('.text-editor--readonly-bar').should('not.exist')
+			cy.get('.text-menubar').getActionEntry('done').should('exist')
+		}
+
+		beforeEach(function () {
+			setReadOnlyMode(1)
+
+			cy.createUser(user)
+			cy.login(user)
+
+			cy.removeFile('test.md')
+			cy.removeFile('test.txt')
+
+			cy.uploadFile('test.md', 'text/markdown')
+			cy.uploadFile('test.md', 'text/plain', 'test.txt')
+
+			cy.visit('/apps/files')
+		})
+
+		it('Test read-only markdown file', function () {
+			cy.openFile('test.md')
+
+			requireReadOnlyBar()
+
+			// Switch to edit-mode
+			cy.get('.text-editor--readonly-bar').getActionEntry('edit').click()
+
+			requireMenubar()
+
+			// Switch to read-only mode
+			cy.get('.text-menubar').getActionEntry('done').click()
+
+			requireReadOnlyBar()
+		})
+
+		it('Test read-only text file', function () {
+			cy.openFile('test.txt')
+
+			requireReadOnlyBar()
+
+			// Switch to edit-mode
+			cy.get('.text-editor--readonly-bar').getActionEntry('edit').click()
+
+			// Check that read-only bar does not exist
+			cy.get('.text-editor--readonly-bar').should('not.exist')
+		})
+	})
+})