diff --git a/cypress/fixtures/github.png b/cypress/fixtures/github.png
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diff --git a/cypress/integration/images.spec.js b/cypress/integration/images.spec.js
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+++ b/cypress/integration/images.spec.js
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+/**
+ * @copyright Copyright (c) 2021 Julien Veyssier <eneiluj@posteo.net>
+ *
+ * @author Julien Veyssier <eneiluj@posteo.net>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+
+import { randHash } from '../utils/'
+const randUser = randHash()
+
+describe('Open test.md in viewer', function() {
+	before(function() {
+		// Init user
+		cy.nextcloudCreateUser(randUser, 'password')
+		cy.login(randUser, 'password')
+
+		// Upload test files
+		cy.uploadFile('test.md', 'text/markdown')
+		cy.uploadFile('github.png', 'image/png')
+	})
+
+	beforeEach(function() {
+		cy.login(randUser, 'password')
+	})
+
+	it('See test.md in the list', function() {
+		cy.get('#fileList tr[data-file="test.md"]', { timeout: 10000 })
+			.should('contain', 'test.md')
+	})
+
+	it('Insert an image from files', function() {
+		cy.openFile('test.md')
+
+		cy.log('Open submenu')
+		const viewer = cy.get('#viewer')
+		const submenu = viewer.get('.action-item.submenu')
+		submenu.click()
+		submenu.should('have.class', 'action-item--open')
+
+		const trigger = submenu.get('.action-item.submenu > div.v-popover > .trigger')
+		trigger
+			.should('have.class', 'trigger')
+			.invoke('attr','aria-describedby')
+			.should('contain', 'popover_')
+			.as('popoverId')
+
+		cy.get('@popoverId').then(popoverId => {
+			cy.log('Click on action entry')
+			const popover = cy.get('div#' + popoverId)
+			popover.should('have.class', 'open')
+			cy.get('div#' + popoverId + ' li:nth-child(2)').click()
+			cy.log('Select the file')
+			cy.get('#picker-filestable tr[data-entryname="github.png"]').click()
+			cy.log('Press OK')
+			cy.get('.oc-dialog > .oc-dialog-buttonrow button').click()
+
+			cy.log('Check the image is visible and well formed')
+			const editor = cy.get('#editor .ProseMirror')
+			editor.should('contain', 'Hello world')
+			editor.get('h2').should('contain', 'Hello world')
+			editor.get('div.image')
+				.should('be.visible')
+				.invoke('attr', 'data-src')
+				.should('contain', 'github.png')
+			editor.get('div.image img').invoke('attr', 'src')
+				.should('contain', 'apps/text/image?documentId=')
+				.should('contain', 'imageFileName')
+				.should('contain', 'github.png')
+		})
+
+
+		cy.screenshot()
+	})
+
+	it('Closes the editor', function() {
+		cy.openFile('test.md')
+		cy.get('#viewer .modal-header button.header-close').click()
+		cy.get('#viewer').should('not.exist')
+	})
+
+})