diff --git a/x-pack/plugins/alerting/server/rules_client/tests/aggregate.test.ts b/x-pack/plugins/alerting/server/rules_client/tests/aggregate.test.ts
index 967f7cd7a8bca..bc1c8d276aedd 100644
--- a/x-pack/plugins/alerting/server/rules_client/tests/aggregate.test.ts
+++ b/x-pack/plugins/alerting/server/rules_client/tests/aggregate.test.ts
@@ -203,7 +203,7 @@ describe('aggregate()', () => {
           },
           snoozed: {
             date_range: {
-              field: 'alert.attributes.snoozeSchedule.startTime',
+              field: 'alert.attributes.snoozeSchedule.rRule.dtstart',
               format: 'strict_date_time',
               ranges: [{ from: 'now' }],
             },
@@ -240,7 +240,7 @@ describe('aggregate()', () => {
           },
           snoozed: {
             date_range: {
-              field: 'alert.attributes.snoozeSchedule.startTime',
+              field: 'alert.attributes.snoozeSchedule.rRule.dtstart',
               format: 'strict_date_time',
               ranges: [{ from: 'now' }],
             },
diff --git a/x-pack/plugins/alerting/server/rules_client/tests/create.test.ts b/x-pack/plugins/alerting/server/rules_client/tests/create.test.ts
index 37059924533b2..f5c839c5006fd 100644
--- a/x-pack/plugins/alerting/server/rules_client/tests/create.test.ts
+++ b/x-pack/plugins/alerting/server/rules_client/tests/create.test.ts
@@ -376,6 +376,7 @@ describe('create()', () => {
           "interval": "1m",
         },
         "scheduledTaskId": "task-123",
+        "snoozeSchedule": Array [],
         "tags": Array [
           "foo",
         ],
@@ -1644,6 +1645,7 @@ describe('create()', () => {
           "interval": "1m",
         },
         "scheduledTaskId": "task-123",
+        "snoozeSchedule": Array [],
         "tags": Array [
           "foo",
         ],
@@ -1777,6 +1779,7 @@ describe('create()', () => {
           "interval": "1m",
         },
         "scheduledTaskId": "task-123",
+        "snoozeSchedule": Array [],
         "tags": Array [
           "foo",
         ],
@@ -1910,6 +1913,7 @@ describe('create()', () => {
           "interval": "1m",
         },
         "scheduledTaskId": "task-123",
+        "snoozeSchedule": Array [],
         "tags": Array [
           "foo",
         ],
@@ -2075,6 +2079,7 @@ describe('create()', () => {
           "interval": "10s",
         },
         "scheduledTaskId": "task-123",
+        "snoozeSchedule": Array [],
         "tags": Array [
           "foo",
         ],
diff --git a/x-pack/plugins/alerting/server/task_runner/task_runner.test.ts b/x-pack/plugins/alerting/server/task_runner/task_runner.test.ts
index 09196b262abd4..f3d2c7039585b 100644
--- a/x-pack/plugins/alerting/server/task_runner/task_runner.test.ts
+++ b/x-pack/plugins/alerting/server/task_runner/task_runner.test.ts
@@ -471,12 +471,36 @@ describe('Task Runner', () => {
     [false, null, false],
     [false, undefined, false],
     // Stringify the snooze schedules for better failure reporting
-    [false, JSON.stringify([{ startTime: DATE_9999, duration: 100000000 }]), false],
-    [false, JSON.stringify([{ startTime: DATE_1970, duration: 100000000 }]), true],
+    [
+      false,
+      JSON.stringify([
+        { rRule: { dtstart: DATE_9999, tzid: 'UTC', count: 1 }, duration: 100000000 },
+      ]),
+      false,
+    ],
+    [
+      false,
+      JSON.stringify([
+        { rRule: { dtstart: DATE_1970, tzid: 'UTC', count: 1 }, duration: 100000000 },
+      ]),
+      true,
+    ],
     [true, null, true],
     [true, undefined, true],
-    [true, JSON.stringify([{ startTime: DATE_9999, duration: 100000000 }]), true],
-    [true, JSON.stringify([{ startTime: DATE_1970, duration: 100000000 }]), true],
+    [
+      true,
+      JSON.stringify([
+        { rRule: { dtstart: DATE_9999, tzid: 'UTC', count: 1 }, duration: 100000000 },
+      ]),
+      true,
+    ],
+    [
+      true,
+      JSON.stringify([
+        { rRule: { dtstart: DATE_1970, tzid: 'UTC', count: 1 }, duration: 100000000 },
+      ]),
+      true,
+    ],
   ];
 
   test.each(snoozeTestParams)(