diff --git a/x-pack/plugins/alerts/server/alerts_client/tests/mute_all.test.ts b/x-pack/plugins/alerts/server/alerts_client/tests/mute_all.test.ts
index 868fa3d8c6aa2..14ebca2135587 100644
--- a/x-pack/plugins/alerts/server/alerts_client/tests/mute_all.test.ts
+++ b/x-pack/plugins/alerts/server/alerts_client/tests/mute_all.test.ts
@@ -12,7 +12,7 @@ import { encryptedSavedObjectsMock } from '../../../../encrypted_saved_objects/s
 import { actionsAuthorizationMock } from '../../../../actions/server/mocks';
 import { AlertsAuthorization } from '../../authorization/alerts_authorization';
 import { ActionsAuthorization } from '../../../../actions/server';
-import { getBeforeSetup } from './lib';
+import { getBeforeSetup, setGlobalDate } from './lib';
 
 const taskManager = taskManagerMock.createStart();
 const alertTypeRegistry = alertTypeRegistryMock.create();
@@ -43,6 +43,8 @@ beforeEach(() => {
   getBeforeSetup(alertsClientParams, taskManager, alertTypeRegistry);
 });
 
+setGlobalDate();
+
 describe('muteAll()', () => {
   test('mutes an alert', async () => {
     const alertsClient = new AlertsClient(alertsClientParams);
@@ -74,6 +76,7 @@ describe('muteAll()', () => {
       {
         muteAll: true,
         mutedInstanceIds: [],
+        updatedAt: '2019-02-12T21:01:22.479Z',
         updatedBy: 'elastic',
       },
       {
diff --git a/x-pack/plugins/alerts/server/alerts_client/tests/unmute_all.test.ts b/x-pack/plugins/alerts/server/alerts_client/tests/unmute_all.test.ts
index 5ef1af9b6f0ee..d92304ab873be 100644
--- a/x-pack/plugins/alerts/server/alerts_client/tests/unmute_all.test.ts
+++ b/x-pack/plugins/alerts/server/alerts_client/tests/unmute_all.test.ts
@@ -12,7 +12,7 @@ import { encryptedSavedObjectsMock } from '../../../../encrypted_saved_objects/s
 import { actionsAuthorizationMock } from '../../../../actions/server/mocks';
 import { AlertsAuthorization } from '../../authorization/alerts_authorization';
 import { ActionsAuthorization } from '../../../../actions/server';
-import { getBeforeSetup } from './lib';
+import { getBeforeSetup, setGlobalDate } from './lib';
 
 const taskManager = taskManagerMock.createStart();
 const alertTypeRegistry = alertTypeRegistryMock.create();
@@ -44,6 +44,8 @@ beforeEach(() => {
   getBeforeSetup(alertsClientParams, taskManager, alertTypeRegistry);
 });
 
+setGlobalDate();
+
 describe('unmuteAll()', () => {
   test('unmutes an alert', async () => {
     const alertsClient = new AlertsClient(alertsClientParams);
@@ -75,6 +77,7 @@ describe('unmuteAll()', () => {
       {
         muteAll: false,
         mutedInstanceIds: [],
+        updatedAt: '2019-02-12T21:01:22.479Z',
         updatedBy: 'elastic',
       },
       {