diff --git a/awx/main/models/inventory.py b/awx/main/models/inventory.py
index e3b71ee594..c3c587dd91 100644
--- a/awx/main/models/inventory.py
+++ b/awx/main/models/inventory.py
@@ -29,8 +29,7 @@ from awx.main.fields import (
 from awx.main.managers import HostManager
 from awx.main.models.base import * # noqa
 from awx.main.models.unified_jobs import * # noqa
-from awx.main.models.jobs import Job
-from awx.main.models.mixins import ResourceMixin
+from awx.main.models.mixins import ResourceMixin, TaskManagerInventoryUpdateMixin
 from awx.main.models.notifications import (
     NotificationTemplate,
     JobNotificationMixin,
@@ -1391,7 +1390,7 @@ class InventorySource(UnifiedJobTemplate, InventorySourceOptions):
         return source
 
 
-class InventoryUpdate(UnifiedJob, InventorySourceOptions, JobNotificationMixin):
+class InventoryUpdate(UnifiedJob, InventorySourceOptions, JobNotificationMixin, TaskManagerInventoryUpdateMixin):
     '''
     Internal job for tracking inventory updates from external sources.
     '''
@@ -1508,20 +1507,9 @@ class InventoryUpdate(UnifiedJob, InventorySourceOptions, JobNotificationMixin):
             return self.global_instance_groups
         return selected_groups
 
-    def _build_job_explanation(self):
-        if not self.job_explanation:
-            return 'Previous Task Canceled: {"job_type": "%s", "job_name": "%s", "job_id": "%s"}' % \
-                   (self.model_to_str(), self.name, self.id)
-        return None
-
-    def get_dependent_jobs(self):
-        return Job.objects.filter(dependent_jobs__in=[self.id])
-
-    def cancel(self, job_explanation=None):
-
-        res = super(InventoryUpdate, self).cancel(job_explanation=job_explanation)
+    def cancel(self, job_explanation=None, is_chain=False):
+        res = super(InventoryUpdate, self).cancel(job_explanation=job_explanation, is_chain=is_chain)
         if res:
-            map(lambda x: x.cancel(job_explanation=self._build_job_explanation()), self.get_dependent_jobs())
             if self.launch_type != 'scm' and self.source_project_update:
                 self.source_project_update.cancel(job_explanation=job_explanation)
         return res
diff --git a/awx/main/models/jobs.py b/awx/main/models/jobs.py
index a32cb1dae8..7a95252c54 100644
--- a/awx/main/models/jobs.py
+++ b/awx/main/models/jobs.py
@@ -38,7 +38,7 @@ from awx.main.utils import (
     parse_yaml_or_json,
 )
 from awx.main.fields import ImplicitRoleField
-from awx.main.models.mixins import ResourceMixin, SurveyJobTemplateMixin, SurveyJobMixin
+from awx.main.models.mixins import ResourceMixin, SurveyJobTemplateMixin, SurveyJobMixin, TaskManagerJobMixin
 from awx.main.models.base import PERM_INVENTORY_SCAN
 from awx.main.fields import JSONField
 
@@ -449,7 +449,7 @@ class JobTemplate(UnifiedJobTemplate, JobOptions, SurveyJobTemplateMixin, Resour
         return dict(error=list(error_notification_templates), success=list(success_notification_templates), any=list(any_notification_templates))
 
 
-class Job(UnifiedJob, JobOptions, SurveyJobMixin, JobNotificationMixin):
+class Job(UnifiedJob, JobOptions, SurveyJobMixin, JobNotificationMixin, TaskManagerJobMixin):
     '''
     A job applies a project (with playbook) to an inventory source with a given
     credential.  It represents a single invocation of ansible-playbook with the
@@ -709,16 +709,6 @@ class Job(UnifiedJob, JobOptions, SurveyJobMixin, JobNotificationMixin):
     def get_notification_friendly_name(self):
         return "Job"
 
-    '''
-    Canceling a job also cancels the implicit project update with launch_type
-    run.
-    '''
-    def cancel(self, job_explanation=None):
-        res = super(Job, self).cancel(job_explanation=job_explanation)
-        if self.project_update:
-            self.project_update.cancel(job_explanation=job_explanation)
-        return res
-
     @property
     def memcached_fact_key(self):
         return '{}'.format(self.inventory.id)
diff --git a/awx/main/models/mixins.py b/awx/main/models/mixins.py
index f767586eff..5ec4a4337d 100644
--- a/awx/main/models/mixins.py
+++ b/awx/main/models/mixins.py
@@ -16,7 +16,9 @@ from awx.main.utils import parse_yaml_or_json
 from awx.main.fields import JSONField
 
 
-__all__ = ['ResourceMixin', 'SurveyJobTemplateMixin', 'SurveyJobMixin']
+__all__ = ['ResourceMixin', 'SurveyJobTemplateMixin', 'SurveyJobMixin', 
+           'TaskManagerUnifiedJobMixin', 'TaskManagerJobMixin', 'TaskManagerProjectUpdateMixin', 
+           'TaskManagerInventoryUpdateMixin',]
 
 
 class ResourceMixin(models.Model):
@@ -249,3 +251,45 @@ class SurveyJobMixin(models.Model):
             return json.dumps(extra_vars)
         else:
             return self.extra_vars
+
+
+class TaskManagerUnifiedJobMixin(models.Model):
+    class Meta:
+        abstract = True
+
+    def get_jobs_fail_chain(self):
+        return []
+
+    def dependent_jobs_finished(self):
+        return True
+
+
+class TaskManagerJobMixin(TaskManagerUnifiedJobMixin):
+    class Meta:
+        abstract = True
+
+    def dependent_jobs_finished(self):
+        for j in self.dependent_jobs.all():
+            if j.status in ['pending', 'waiting', 'running']:
+                return False
+        return True
+
+
+class TaskManagerUpdateOnLaunchMixin(TaskManagerUnifiedJobMixin):
+    class Meta:
+        abstract = True
+
+    def get_jobs_fail_chain(self):
+        return list(self.dependent_jobs.all())
+
+
+class TaskManagerProjectUpdateMixin(TaskManagerUpdateOnLaunchMixin):
+    class Meta:
+        abstract = True
+
+
+class TaskManagerInventoryUpdateMixin(TaskManagerUpdateOnLaunchMixin):
+    class Meta:
+        abstract = True
+
+
diff --git a/awx/main/models/projects.py b/awx/main/models/projects.py
index bc0d4d16ed..827b131aed 100644
--- a/awx/main/models/projects.py
+++ b/awx/main/models/projects.py
@@ -23,7 +23,7 @@ from awx.main.models.notifications import (
     JobNotificationMixin,
 )
 from awx.main.models.unified_jobs import * # noqa
-from awx.main.models.mixins import ResourceMixin
+from awx.main.models.mixins import ResourceMixin, TaskManagerProjectUpdateMixin
 from awx.main.utils import update_scm_url
 from awx.main.utils.ansible import skip_directory, could_be_inventory, could_be_playbook
 from awx.main.fields import ImplicitRoleField
@@ -430,7 +430,7 @@ class Project(UnifiedJobTemplate, ProjectOptions, ResourceMixin):
         return reverse('api:project_detail', kwargs={'pk': self.pk}, request=request)
 
 
-class ProjectUpdate(UnifiedJob, ProjectOptions, JobNotificationMixin):
+class ProjectUpdate(UnifiedJob, ProjectOptions, JobNotificationMixin, TaskManagerProjectUpdateMixin):
     '''
     Internal job for tracking project updates from SCM.
     '''
@@ -512,8 +512,8 @@ class ProjectUpdate(UnifiedJob, ProjectOptions, JobNotificationMixin):
                         update_fields.append('scm_delete_on_next_update')
             parent_instance.save(update_fields=update_fields)
 
-    def cancel(self, job_explanation=None):
-        res = super(ProjectUpdate, self).cancel(job_explanation=job_explanation)
+    def cancel(self, job_explanation=None, is_chain=False):
+        res = super(ProjectUpdate, self).cancel(job_explanation=job_explanation, is_chain=is_chain)
         if res and self.launch_type != 'sync':
             for inv_src in self.scm_inventory_updates.filter(status='running'):
                 inv_src.cancel(job_explanation='Source project update `{}` was canceled.'.format(self.name))
diff --git a/awx/main/models/unified_jobs.py b/awx/main/models/unified_jobs.py
index a763239d15..dadb9d2b65 100644
--- a/awx/main/models/unified_jobs.py
+++ b/awx/main/models/unified_jobs.py
@@ -30,7 +30,7 @@ from djcelery.models import TaskMeta
 # AWX
 from awx.main.models.base import * # noqa
 from awx.main.models.schedules import Schedule
-from awx.main.models.mixins import ResourceMixin
+from awx.main.models.mixins import ResourceMixin, TaskManagerUnifiedJobMixin
 from awx.main.utils import (
     decrypt_field, _inventory_updates,
     copy_model_by_class, copy_m2m_relationships
@@ -414,7 +414,7 @@ class UnifiedJobTypeStringMixin(object):
         return UnifiedJobTypeStringMixin._camel_to_underscore(self.__class__.__name__)
 
 
-class UnifiedJob(PolymorphicModel, PasswordFieldsModel, CommonModelNameNotUnique, UnifiedJobTypeStringMixin):
+class UnifiedJob(PolymorphicModel, PasswordFieldsModel, CommonModelNameNotUnique, UnifiedJobTypeStringMixin, TaskManagerUnifiedJobMixin):
     '''
     Concrete base class for unified job run by the task engine.
     '''
@@ -1058,8 +1058,17 @@ class UnifiedJob(PolymorphicModel, PasswordFieldsModel, CommonModelNameNotUnique
             if settings.DEBUG:
                 raise
 
-    def cancel(self, job_explanation=None):
+    def _build_job_explanation(self):
+        if not self.job_explanation:
+            return 'Previous Task Canceled: {"job_type": "%s", "job_name": "%s", "job_id": "%s"}' % \
+                   (self.model_to_str(), self.name, self.id)
+        return None
+
+    def cancel(self, job_explanation=None, is_chain=False):
         if self.can_cancel:
+            if not is_chain:
+                map(lambda x: x.cancel(job_explanation=self._build_job_explanation(), is_chain=True), self.get_jobs_fail_chain())
+
             if not self.cancel_flag:
                 self.cancel_flag = True
                 cancel_fields = ['cancel_flag']
diff --git a/awx/main/scheduler/__init__.py b/awx/main/scheduler/__init__.py
index 8e0e1fc340..3e83c759d8 100644
--- a/awx/main/scheduler/__init__.py
+++ b/awx/main/scheduler/__init__.py
@@ -47,6 +47,10 @@ class TaskManager():
         for g in self.graph:
             if self.graph[g]['graph'].is_job_blocked(task):
                 return True
+
+        if not task.dependent_jobs_finished():
+            return True
+
         return False
 
     def get_tasks(self, status_list=('pending', 'waiting', 'running')):
@@ -262,11 +266,12 @@ class TaskManager():
         return inventory_task
 
     def capture_chain_failure_dependencies(self, task, dependencies):
-        for dep in dependencies:
-            with disable_activity_stream():
-                logger.info('Adding unified job {} to list of dependencies of {}.'.format(task.id, dep.id))
-                dep.dependent_jobs.add(task.id)
-                dep.save()
+        with disable_activity_stream():
+            task.dependent_jobs.add(*dependencies)
+
+            for dep in dependencies:
+                # Add task + all deps except self
+                dep.dependent_jobs.add(*([task] + filter(lambda d: d != dep, dependencies)))
 
     def should_update_inventory_source(self, job, inventory_source):
         now = tz_now()
@@ -342,7 +347,9 @@ class TaskManager():
                     if self.should_update_inventory_source(task, inventory_source):
                         inventory_task = self.create_inventory_update(task, inventory_source)
                         dependencies.append(inventory_task)
-        self.capture_chain_failure_dependencies(task, dependencies)
+
+            if len(dependencies) > 0:
+                self.capture_chain_failure_dependencies(task, dependencies)
         return dependencies
 
     def process_dependencies(self, dependent_task, dependency_tasks):
@@ -359,7 +366,9 @@ class TaskManager():
                 if not self.would_exceed_capacity(task, rampart_group.name):
                     logger.debug("Starting dependent task {} in group {}".format(task, rampart_group.name))
                     self.graph[rampart_group.name]['graph'].add_job(task)
-                    self.start_task(task, rampart_group, dependency_tasks)
+                    tasks_to_fail = filter(lambda t: t != task, dependency_tasks)
+                    tasks_to_fail += [dependent_task]
+                    self.start_task(task, rampart_group, tasks_to_fail)
                     found_acceptable_queue = True
             if not found_acceptable_queue:
                 logger.debug("Dependent task {} couldn't be scheduled on graph, waiting for next cycle".format(task))
@@ -379,7 +388,7 @@ class TaskManager():
                 if not self.would_exceed_capacity(task, rampart_group.name):
                     logger.debug("Starting task {} in group {}".format(task, rampart_group.name))
                     self.graph[rampart_group.name]['graph'].add_job(task)
-                    self.start_task(task, rampart_group)
+                    self.start_task(task, rampart_group, task.get_jobs_fail_chain())
                     found_acceptable_queue = True
                     break
             if not found_acceptable_queue:
diff --git a/awx/main/tasks.py b/awx/main/tasks.py
index 5b02e694fb..99d1e86af6 100644
--- a/awx/main/tasks.py
+++ b/awx/main/tasks.py
@@ -314,7 +314,7 @@ def handle_work_error(self, task_id, subtasks=None):
                 first_instance = instance
                 first_instance_type = each_task['type']
 
-            if instance.celery_task_id != task_id:
+            if instance.celery_task_id != task_id and not instance.cancel_flag:
                 instance.status = 'failed'
                 instance.failed = True
                 if not instance.job_explanation:
@@ -1398,11 +1398,12 @@ class RunProjectUpdate(BaseTask):
 
     def get_stdout_handle(self, instance):
         stdout_handle = super(RunProjectUpdate, self).get_stdout_handle(instance)
+        pk = instance.pk
 
         def raw_callback(data):
-            instance_actual = ProjectUpdate.objects.get(pk=instance.pk)
-            instance_actual.result_stdout_text += data
-            instance_actual.save()
+            instance_actual = self.update_model(pk)
+            result_stdout_text = instance_actual.result_stdout_text + data
+            self.update_model(pk, result_stdout_text=result_stdout_text)
         return OutputEventFilter(stdout_handle, raw_callback=raw_callback)
 
     def _update_dependent_inventories(self, project_update, dependent_inventory_sources):
@@ -1872,11 +1873,12 @@ class RunInventoryUpdate(BaseTask):
 
     def get_stdout_handle(self, instance):
         stdout_handle = super(RunInventoryUpdate, self).get_stdout_handle(instance)
+        pk = instance.pk
 
         def raw_callback(data):
-            instance_actual = InventoryUpdate.objects.get(pk=instance.pk)
-            instance_actual.result_stdout_text += data
-            instance_actual.save()
+            instance_actual = self.update_model(pk)
+            result_stdout_text = instance_actual.result_stdout_text + data
+            self.update_model(pk, result_stdout_text=result_stdout_text)
         return OutputEventFilter(stdout_handle, raw_callback=raw_callback)
 
     def build_cwd(self, inventory_update, **kwargs):
@@ -2138,11 +2140,12 @@ class RunSystemJob(BaseTask):
 
     def get_stdout_handle(self, instance):
         stdout_handle = super(RunSystemJob, self).get_stdout_handle(instance)
+        pk = instance.pk
 
         def raw_callback(data):
-            instance_actual = SystemJob.objects.get(pk=instance.pk)
-            instance_actual.result_stdout_text += data
-            instance_actual.save()
+            instance_actual = self.update_model(pk)
+            result_stdout_text = instance_actual.result_stdout_text + data
+            self.update_model(pk, result_stdout_text=result_stdout_text)
         return OutputEventFilter(stdout_handle, raw_callback=raw_callback)
 
     def build_env(self, instance, **kwargs):
diff --git a/awx/main/tests/functional/task_management/test_rampart_groups.py b/awx/main/tests/functional/task_management/test_rampart_groups.py
index 3b5622d7fd..c81556e091 100644
--- a/awx/main/tests/functional/task_management/test_rampart_groups.py
+++ b/awx/main/tests/functional/task_management/test_rampart_groups.py
@@ -29,7 +29,7 @@ def test_multi_group_basic_job_launch(instance_factory, default_instance_group,
         mock_task_impact.return_value = 500
         with mocker.patch("awx.main.scheduler.TaskManager.start_task"):
             TaskManager().schedule()
-            TaskManager.start_task.assert_has_calls([mock.call(j1, ig1), mock.call(j2, ig2)])
+            TaskManager.start_task.assert_has_calls([mock.call(j1, ig1, []), mock.call(j2, ig2, [])])
 
 
 
@@ -63,13 +63,26 @@ def test_multi_group_with_shared_dependency(instance_factory, default_instance_g
     with mocker.patch("awx.main.scheduler.TaskManager.start_task"):
         TaskManager().schedule()
         pu = p.project_updates.first()
-        TaskManager.start_task.assert_called_once_with(pu, default_instance_group, [pu])
+        TaskManager.start_task.assert_called_once_with(pu, default_instance_group, [j1])
         pu.finished = pu.created + timedelta(seconds=1)
         pu.status = "successful"
         pu.save()
     with mock.patch("awx.main.scheduler.TaskManager.start_task"):
         TaskManager().schedule()
-        TaskManager.start_task.assert_has_calls([mock.call(j1, ig1), mock.call(j2, ig2)])
+        TaskManager.start_task.assert_called_once_with(j1, ig1, [])
+        j1.finished = j1.created + timedelta(seconds=2)
+        j1.status = "successful"
+        j1.save()
+    with mock.patch("awx.main.scheduler.TaskManager.start_task"):
+        TaskManager().schedule()
+        pu = p.project_updates.last()
+        TaskManager.start_task.assert_called_once_with(pu, default_instance_group, [j2])
+        pu.finished = pu.created + timedelta(seconds=1)
+        pu.status = "successful"
+        pu.save()
+    with mock.patch("awx.main.scheduler.TaskManager.start_task"):
+        TaskManager().schedule()
+        TaskManager.start_task.assert_called_once_with(j2, ig2, [])
 
 
 @pytest.mark.django_db
@@ -114,8 +127,8 @@ def test_overcapacity_blocking_other_groups_unaffected(instance_factory, default
         mock_task_impact.return_value = 500
         with mock.patch.object(TaskManager, "start_task", wraps=tm.start_task) as mock_job:
             tm.schedule()
-            mock_job.assert_has_calls([mock.call(j1, ig1), mock.call(j1_1, ig1),
-                                       mock.call(j2, ig2)])
+            mock_job.assert_has_calls([mock.call(j1, ig1, []), mock.call(j1_1, ig1, []),
+                                       mock.call(j2, ig2, [])])
             assert mock_job.call_count == 3
 
 
@@ -146,5 +159,5 @@ def test_failover_group_run(instance_factory, default_instance_group, mocker,
         mock_task_impact.return_value = 500
         with mock.patch.object(TaskManager, "start_task", wraps=tm.start_task) as mock_job:
             tm.schedule()
-            mock_job.assert_has_calls([mock.call(j1, ig1), mock.call(j1_1, ig2)])
+            mock_job.assert_has_calls([mock.call(j1, ig1, []), mock.call(j1_1, ig2, [])])
             assert mock_job.call_count == 2
diff --git a/awx/main/tests/functional/task_management/test_scheduler.py b/awx/main/tests/functional/task_management/test_scheduler.py
index 15646dfe54..cb1d689577 100644
--- a/awx/main/tests/functional/task_management/test_scheduler.py
+++ b/awx/main/tests/functional/task_management/test_scheduler.py
@@ -17,8 +17,7 @@ def test_single_job_scheduler_launch(default_instance_group, job_template_factor
     j.save()
     with mocker.patch("awx.main.scheduler.TaskManager.start_task"):
         TaskManager().schedule()
-        assert TaskManager.start_task.called
-        assert TaskManager.start_task.call_args == ((j, default_instance_group),)
+        TaskManager.start_task.assert_called_once_with(j, default_instance_group, [])
 
 
 @pytest.mark.django_db
@@ -34,12 +33,12 @@ def test_single_jt_multi_job_launch_blocks_last(default_instance_group, job_temp
     j2.save()
     with mock.patch("awx.main.scheduler.TaskManager.start_task"):
         TaskManager().schedule()
-        TaskManager.start_task.assert_called_once_with(j1, default_instance_group)
+        TaskManager.start_task.assert_called_once_with(j1, default_instance_group, [])
         j1.status = "successful"
         j1.save()
     with mocker.patch("awx.main.scheduler.TaskManager.start_task"):
         TaskManager().schedule()
-        TaskManager.start_task.assert_called_once_with(j2, default_instance_group)
+        TaskManager.start_task.assert_called_once_with(j2, default_instance_group, [])
 
 
 @pytest.mark.django_db
@@ -60,8 +59,8 @@ def test_single_jt_multi_job_launch_allow_simul_allowed(default_instance_group,
     j2.save()
     with mock.patch("awx.main.scheduler.TaskManager.start_task"):
         TaskManager().schedule()
-        TaskManager.start_task.assert_has_calls([mock.call(j1, default_instance_group),
-                                                 mock.call(j2, default_instance_group)])
+        TaskManager.start_task.assert_has_calls([mock.call(j1, default_instance_group, []),
+                                                 mock.call(j2, default_instance_group, [])])
 
 
 @pytest.mark.django_db
@@ -83,12 +82,12 @@ def test_multi_jt_capacity_blocking(default_instance_group, job_template_factory
         mock_task_impact.return_value = 500
         with mock.patch.object(TaskManager, "start_task", wraps=tm.start_task) as mock_job:
             tm.schedule()
-            mock_job.assert_called_once_with(j1, default_instance_group)
+            mock_job.assert_called_once_with(j1, default_instance_group, [])
             j1.status = "successful"
             j1.save()
     with mock.patch.object(TaskManager, "start_task", wraps=tm.start_task) as mock_job:
         tm.schedule()
-        mock_job.assert_called_once_with(j2, default_instance_group)
+        mock_job.assert_called_once_with(j2, default_instance_group, [])
     
     
 
@@ -113,12 +112,12 @@ def test_single_job_dependencies_project_launch(default_instance_group, job_temp
             mock_pu.assert_called_once_with(j)
             pu = [x for x in p.project_updates.all()]
             assert len(pu) == 1
-            TaskManager.start_task.assert_called_once_with(pu[0], default_instance_group, [pu[0]])
+            TaskManager.start_task.assert_called_once_with(pu[0], default_instance_group, [j])
             pu[0].status = "successful"
             pu[0].save()
     with mock.patch("awx.main.scheduler.TaskManager.start_task"):
         TaskManager().schedule()
-        TaskManager.start_task.assert_called_once_with(j, default_instance_group)
+        TaskManager.start_task.assert_called_once_with(j, default_instance_group, [])
 
 
 @pytest.mark.django_db
@@ -143,12 +142,12 @@ def test_single_job_dependencies_inventory_update_launch(default_instance_group,
             mock_iu.assert_called_once_with(j, ii)
             iu = [x for x in ii.inventory_updates.all()]
             assert len(iu) == 1
-            TaskManager.start_task.assert_called_once_with(iu[0], default_instance_group, [iu[0]])
+            TaskManager.start_task.assert_called_once_with(iu[0], default_instance_group, [j])
             iu[0].status = "successful"
             iu[0].save()
     with mock.patch("awx.main.scheduler.TaskManager.start_task"):
         TaskManager().schedule()
-        TaskManager.start_task.assert_called_once_with(j, default_instance_group)
+        TaskManager.start_task.assert_called_once_with(j, default_instance_group, [])
         
 
 @pytest.mark.django_db
@@ -181,8 +180,8 @@ def test_shared_dependencies_launch(default_instance_group, job_template_factory
         TaskManager().schedule()
         pu = p.project_updates.first()
         iu = ii.inventory_updates.first()
-        TaskManager.start_task.assert_has_calls([mock.call(pu, default_instance_group, [pu, iu]),
-                                                 mock.call(iu, default_instance_group, [pu, iu])])
+        TaskManager.start_task.assert_has_calls([mock.call(pu, default_instance_group, [iu, j1]),
+                                                 mock.call(iu, default_instance_group, [pu, j1])])
         pu.status = "successful"
         pu.finished = pu.created + timedelta(seconds=1)
         pu.save()
@@ -191,12 +190,12 @@ def test_shared_dependencies_launch(default_instance_group, job_template_factory
         iu.save()
     with mock.patch("awx.main.scheduler.TaskManager.start_task"):
         TaskManager().schedule()
-        TaskManager.start_task.assert_called_once_with(j1, default_instance_group)
+        TaskManager.start_task.assert_called_once_with(j1, default_instance_group, [])
         j1.status = "successful"
         j1.save()
     with mock.patch("awx.main.scheduler.TaskManager.start_task"):
         TaskManager().schedule()
-        TaskManager.start_task.assert_called_once_with(j2, default_instance_group)
+        TaskManager.start_task.assert_called_once_with(j2, default_instance_group, [])
     pu = [x for x in p.project_updates.all()]
     iu = [x for x in ii.inventory_updates.all()]
     assert len(pu) == 1
diff --git a/awx/main/tests/unit/models/test_inventory.py b/awx/main/tests/unit/models/test_inventory.py
index 4f0d5eddd8..0fa390bceb 100644
--- a/awx/main/tests/unit/models/test_inventory.py
+++ b/awx/main/tests/unit/models/test_inventory.py
@@ -7,33 +7,23 @@ from django.core.exceptions import ValidationError
 from awx.main.models import (
     UnifiedJob,
     InventoryUpdate,
-    Job,
     Inventory,
     Credential,
     CredentialType,
 )
 
 
-@pytest.fixture
-def dependent_job(mocker):
-    j = Job(id=3, name='I_am_a_job')
-    j.cancel = mocker.MagicMock(return_value=True)
-    return [j]
-
-
-def test_cancel(mocker, dependent_job):
+def test_cancel(mocker):
     with mock.patch.object(UnifiedJob, 'cancel', return_value=True) as parent_cancel:
         iu = InventoryUpdate()
 
-        iu.get_dependent_jobs = mocker.MagicMock(return_value=dependent_job)
         iu.save = mocker.MagicMock()
         build_job_explanation_mock = mocker.MagicMock()
         iu._build_job_explanation = mocker.MagicMock(return_value=build_job_explanation_mock)
 
         iu.cancel()
 
-        parent_cancel.assert_called_with(job_explanation=None)
-        dependent_job[0].cancel.assert_called_with(job_explanation=build_job_explanation_mock)
+        parent_cancel.assert_called_with(is_chain=False, job_explanation=None)
         
 
 def test__build_job_explanation():