diff --git a/x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/action/TransportUpdateCalendarJobAction.java b/x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/action/TransportUpdateCalendarJobAction.java
index 0524cb28a0c..12e6fb62fd7 100644
--- a/x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/action/TransportUpdateCalendarJobAction.java
+++ b/x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/action/TransportUpdateCalendarJobAction.java
@@ -28,7 +28,6 @@ import java.util.stream.Collectors;
 
 public class TransportUpdateCalendarJobAction extends HandledTransportAction<UpdateCalendarJobAction.Request, PutCalendarAction.Response> {
 
-    private final ClusterService clusterService;
     private final JobProvider jobProvider;
     private final JobManager jobManager;
 
@@ -36,27 +35,21 @@ public class TransportUpdateCalendarJobAction extends HandledTransportAction<Upd
     public TransportUpdateCalendarJobAction(Settings settings, ThreadPool threadPool,
                                             TransportService transportService, ActionFilters actionFilters,
                                             IndexNameExpressionResolver indexNameExpressionResolver,
-                                            ClusterService clusterService, JobProvider jobProvider, JobManager jobManager) {
+                                            JobProvider jobProvider, JobManager jobManager) {
         super(settings, UpdateCalendarJobAction.NAME, threadPool, transportService, actionFilters,
                 indexNameExpressionResolver, UpdateCalendarJobAction.Request::new);
-        this.clusterService = clusterService;
         this.jobProvider = jobProvider;
         this.jobManager = jobManager;
     }
 
     @Override
     protected void doExecute(UpdateCalendarJobAction.Request request, ActionListener<PutCalendarAction.Response> listener) {
-        ClusterState clusterState = clusterService.state();
-        final MlMetadata mlMetadata = MlMetadata.getMlMetadata(clusterState);
-
         Set<String> jobIdsToAdd = Strings.tokenizeByCommaToSet(request.getJobIdsToAddExpression());
         Set<String> jobIdsToRemove = Strings.tokenizeByCommaToSet(request.getJobIdsToRemoveExpression());
 
-        jobProvider.updateCalendar(request.getCalendarId(), jobIdsToAdd, jobIdsToRemove, mlMetadata,
+        jobProvider.updateCalendar(request.getCalendarId(), jobIdsToAdd, jobIdsToRemove,
                 c -> {
-                    List<String> existingJobsOrGroups =
-                            c.getJobIds().stream().filter(mlMetadata::isGroupOrJob).collect(Collectors.toList());
-                    jobManager.updateProcessOnCalendarChanged(existingJobsOrGroups);
+                    jobManager.updateProcessOnCalendarChanged(c.getJobIds());
                     listener.onResponse(new PutCalendarAction.Response(c));
                 }, listener::onFailure);
     }
diff --git a/x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/job/JobManager.java b/x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/job/JobManager.java
index 2d67e64ec60..3694e41a8b8 100644
--- a/x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/job/JobManager.java
+++ b/x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/job/JobManager.java
@@ -67,6 +67,7 @@ import java.util.concurrent.atomic.AtomicReference;
 import java.util.function.Consumer;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
+import java.util.stream.Collectors;
 
 /**
  * Allows interactions with jobs. The managed interactions include:
@@ -420,8 +421,13 @@ public class JobManager extends AbstractComponent {
 
     public void updateProcessOnCalendarChanged(List<String> calendarJobIds) {
         ClusterState clusterState = clusterService.state();
+        MlMetadata mlMetadata = MlMetadata.getMlMetadata(clusterState);
+
+        List<String> existingJobsOrGroups =
+                calendarJobIds.stream().filter(mlMetadata::isGroupOrJob).collect(Collectors.toList());
+
         Set<String> expandedJobIds = new HashSet<>();
-        calendarJobIds.forEach(jobId -> expandedJobIds.addAll(expandJobIds(jobId, true, clusterState)));
+        existingJobsOrGroups.forEach(jobId -> expandedJobIds.addAll(expandJobIds(jobId, true, clusterState)));
         for (String jobId : expandedJobIds) {
             if (isJobOpen(clusterState, jobId)) {
                 updateJobProcessNotifier.submitJobUpdate(UpdateParams.scheduledEventsUpdate(jobId), ActionListener.wrap(
diff --git a/x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/job/persistence/JobProvider.java b/x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/job/persistence/JobProvider.java
index d7b10fb622b..8014bacf1e0 100644
--- a/x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/job/persistence/JobProvider.java
+++ b/x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/job/persistence/JobProvider.java
@@ -1114,7 +1114,7 @@ public class JobProvider {
                 result -> handler.accept(result.result), errorHandler, () -> null);
     }
 
-    public void updateCalendar(String calendarId, Set<String> jobIdsToAdd, Set<String> jobIdsToRemove, MlMetadata mlMetadata,
+    public void updateCalendar(String calendarId, Set<String> jobIdsToAdd, Set<String> jobIdsToRemove,
                                Consumer<Calendar> handler, Consumer<Exception> errorHandler) {
 
         ActionListener<Calendar> getCalendarListener = ActionListener.wrap(
diff --git a/x-pack/plugin/ml/src/test/java/org/elasticsearch/xpack/ml/integration/JobProviderIT.java b/x-pack/plugin/ml/src/test/java/org/elasticsearch/xpack/ml/integration/JobProviderIT.java
index 11f714ae449..120f04e95e7 100644
--- a/x-pack/plugin/ml/src/test/java/org/elasticsearch/xpack/ml/integration/JobProviderIT.java
+++ b/x-pack/plugin/ml/src/test/java/org/elasticsearch/xpack/ml/integration/JobProviderIT.java
@@ -244,7 +244,7 @@ public class JobProviderIT extends MlSingleNodeTestCase {
             throws Exception {
         CountDownLatch latch = new CountDownLatch(1);
         AtomicReference<Exception> exceptionHolder = new AtomicReference<>();
-        jobProvider.updateCalendar(calendarId, idsToAdd, idsToRemove, mlMetadata,
+        jobProvider.updateCalendar(calendarId, idsToAdd, idsToRemove,
                 r -> latch.countDown(),
                 e -> {
                     exceptionHolder.set(e);
diff --git a/x-pack/plugin/src/test/resources/rest-api-spec/test/ml/calendar_crud.yml b/x-pack/plugin/src/test/resources/rest-api-spec/test/ml/calendar_crud.yml
index 9b3572739cd..1406e04c8da 100644
--- a/x-pack/plugin/src/test/resources/rest-api-spec/test/ml/calendar_crud.yml
+++ b/x-pack/plugin/src/test/resources/rest-api-spec/test/ml/calendar_crud.yml
@@ -86,23 +86,6 @@
       xpack.ml.get_calendars:
         calendar_id: "dogs_of_the_year"
 
-  - do:
-      xpack.ml.put_calendar:
-        calendar_id: "new_cal_with_unknown_job_group"
-        body:  >
-          {
-            "job_ids": ["cal-job", "unknown-job-group"]
-          }
-
-  - do:
-      xpack.ml.get_calendars:
-        calendar_id: "new_cal_with_unknown_job_group"
-  - match: { count: 1 }
-  - match:
-      calendars.0:
-        calendar_id: "new_cal_with_unknown_job_group"
-        job_ids: ["cal-job", "unknown-job-group"]
-
 ---
 "Test get calendar given missing":
   - do:
@@ -714,3 +697,106 @@
   - match: { calendar_id: "expression" }
   - length: { job_ids: 1 }
   - match: { job_ids.0: "bar-a" }
+
+---
+"Test calendar actions with new job group":
+  - do:
+      xpack.ml.put_job:
+        job_id: calendar-job
+        body:  >
+          {
+            "analysis_config" : {
+                "detectors" :[{"function":"metric","field_name":"responsetime","by_field_name":"airline"}]
+            },
+            "data_description" : {
+            }
+          }
+
+  - do:
+      xpack.ml.put_calendar:
+        calendar_id: "cal_with_new_job_group"
+        body:  >
+          {
+            "job_ids": ["calendar-job", "new-job-group"]
+          }
+
+  - do:
+      xpack.ml.get_calendars:
+        calendar_id: "cal_with_new_job_group"
+  - match: { count: 1 }
+  - match:
+      calendars.0:
+        calendar_id: "cal_with_new_job_group"
+        job_ids: ["calendar-job", "new-job-group"]
+
+  - do:
+      xpack.ml.post_calendar_events:
+        calendar_id: "cal_with_new_job_group"
+        body: >
+          {
+            "events" : [{ "description": "beach", "start_time": "2018-05-01T00:00:00Z", "end_time": "2018-05-06T00:00:00Z" }]
+          }
+
+  - do:
+      xpack.ml.get_calendar_events:
+        calendar_id: cal_with_new_job_group
+  - length: { events: 1 }
+  - match: { events.0.description: beach }
+
+  - do:
+      xpack.ml.delete_calendar:
+        calendar_id: "cal_with_new_job_group"
+
+  - do:
+      xpack.ml.put_calendar:
+        calendar_id: "started_empty_calendar"
+
+  - do:
+      xpack.ml.put_calendar_job:
+        calendar_id: "started_empty_calendar"
+        job_id: "new-group"
+  - match: { calendar_id: "started_empty_calendar" }
+  - length: { job_ids: 1 }
+
+  - do:
+      xpack.ml.get_calendars:
+        calendar_id: "started_empty_calendar"
+  - match: { count: 1 }
+  - match:
+      calendars.0:
+        calendar_id: "started_empty_calendar"
+        job_ids: ["new-group"]
+
+  - do:
+      xpack.ml.post_calendar_events:
+        calendar_id: "started_empty_calendar"
+        body: >
+          {
+            "events" : [{ "description": "beach", "start_time": "2018-05-01T00:00:00Z", "end_time": "2018-05-06T00:00:00Z" }]
+          }
+
+  - do:
+      xpack.ml.get_calendar_events:
+        calendar_id: "started_empty_calendar"
+  - length: { events: 1 }
+  - match: { events.0.description: beach }
+  - set: { events.0.event_id: beach_event_id }
+
+  - do:
+      xpack.ml.delete_calendar_event:
+        calendar_id: "started_empty_calendar"
+        event_id: $beach_event_id
+
+  - do:
+      xpack.ml.get_calendar_events:
+        calendar_id: "started_empty_calendar"
+  - length: { events: 0 }
+
+  - do:
+      xpack.ml.delete_calendar:
+        calendar_id: "started_empty_calendar"
+
+  - do:
+      catch: missing
+      xpack.ml.get_calendars:
+        calendar_id: "started_empty_calendar"