diff --git a/src/components/AdminSettings.vue b/src/components/AdminSettings.vue
index c3f47c294..83a31b4ea 100644
--- a/src/components/AdminSettings.vue
+++ b/src/components/AdminSettings.vue
@@ -60,8 +60,6 @@ export default {
 		SettingsTitle,
 	},
 
-	props: [],
-
 	data() {
 		return {
 			state: loadState('integration_openproject', 'admin-config'),
@@ -71,12 +69,6 @@ export default {
 		}
 	},
 
-	watch: {
-	},
-
-	mounted() {
-	},
-
 	methods: {
 		onInput() {
 			const that = this
@@ -103,8 +95,6 @@ export default {
 						+ ': ' + error.response.request.responseText
 					)
 				})
-				.then(() => {
-				})
 		},
 	},
 }
diff --git a/tests/jest/components/AdminSettings.spec.js b/tests/jest/components/AdminSettings.spec.js
new file mode 100644
index 000000000..be4d0befd
--- /dev/null
+++ b/tests/jest/components/AdminSettings.spec.js
@@ -0,0 +1,75 @@
+/* jshint esversion: 8 */
+
+import { createLocalVue, shallowMount } from '@vue/test-utils'
+import AdminSettings from '../../../src/components/AdminSettings'
+import * as initialState from '@nextcloud/initial-state'
+
+const localVue = createLocalVue()
+
+const selectors = {
+	oauthInstance: '#openproject-oauth-instance',
+	oauthClientId: '#openproject-client-id',
+	oauthClientSecret: '#openproject-client-secret',
+}
+
+// eslint-disable-next-line no-import-assign
+initialState.loadState = jest.fn(() => {
+	return {
+		oauth_instance_url: null,
+		oauth_client_id: null,
+		oauth_client_secret: null,
+	}
+})
+
+describe('AdminSettings', () => {
+	describe('input readonly attribute on focus', () => {
+		it.each([
+			selectors.oauthClientId,
+			selectors.oauthClientSecret,
+		])('should have on readonly attribute after the input is focused', async (inputSelector) => {
+			const wrapper = getWrapper()
+			const inputField = wrapper.find(inputSelector)
+			expect(inputField.attributes().readonly).toBeTruthy()
+
+			await inputField.trigger('focus')
+
+			expect(inputField.attributes().readonly).toBeFalsy()
+
+			await inputField.trigger('blur')
+
+			expect(inputField.attributes().readonly).toBeFalsy()
+		})
+	})
+	describe('on input event', () => {
+		beforeEach(() => {
+			jest.clearAllMocks()
+		})
+		it.each([
+			selectors.oauthInstance,
+			selectors.oauthClientId,
+			selectors.oauthClientId,
+		])('should call "onInput" method', async (inputSelector) => {
+			const onInputSpy = jest.spyOn(AdminSettings.methods, 'onInput')
+				.mockImplementationOnce(() => {
+				})
+			const wrapper = getWrapper()
+			const inputField = wrapper.find(inputSelector)
+
+			await inputField.trigger('input')
+
+			expect(onInputSpy).toHaveBeenCalledTimes(1)
+		})
+	})
+})
+
+function getWrapper() {
+	return shallowMount(AdminSettings, {
+		localVue,
+		mocks: {
+			t: (app, msg) => msg,
+			generateUrl() {
+				return '/'
+			},
+		},
+	})
+}