diff --git a/awx/api/views/__init__.py b/awx/api/views/__init__.py
index dd31948acf..9d0e19b95e 100644
--- a/awx/api/views/__init__.py
+++ b/awx/api/views/__init__.py
@@ -102,7 +102,7 @@ from awx.main.scheduler.dag_workflow import WorkflowDAG
 from awx.api.views.mixin import (
     ControlledByScmMixin, InstanceGroupMembershipMixin,
     OrganizationCountsMixin, RelatedJobsPreventDeleteMixin,
-    UnifiedJobDeletionMixin,
+    UnifiedJobDeletionMixin, NoTruncateMixin,
 )
 from awx.api.views.organization import ( # noqa
     OrganizationList,
@@ -3785,18 +3785,12 @@ class JobHostSummaryDetail(RetrieveAPIView):
     serializer_class = serializers.JobHostSummarySerializer
 
 
-class JobEventList(ListAPIView):
+class JobEventList(NoTruncateMixin, ListAPIView):
 
     model = models.JobEvent
     serializer_class = serializers.JobEventSerializer
     search_fields = ('stdout',)
 
-    def get_serializer_context(self):
-        context = super().get_serializer_context()
-        if self.request.query_params.get('no_truncate'):
-            context.update(no_truncate=True)
-        return context
-
 
 class JobEventDetail(RetrieveAPIView):
 
@@ -3809,7 +3803,7 @@ class JobEventDetail(RetrieveAPIView):
         return context
 
 
-class JobEventChildrenList(SubListAPIView):
+class JobEventChildrenList(NoTruncateMixin, SubListAPIView):
 
     model = models.JobEvent
     serializer_class = serializers.JobEventSerializer
@@ -3834,7 +3828,7 @@ class JobEventHostsList(HostRelatedSearchMixin, SubListAPIView):
     name = _('Job Event Hosts List')
 
 
-class BaseJobEventsList(SubListAPIView):
+class BaseJobEventsList(NoTruncateMixin, SubListAPIView):
 
     model = models.JobEvent
     serializer_class = serializers.JobEventSerializer
@@ -4030,18 +4024,12 @@ class AdHocCommandRelaunch(GenericAPIView):
             return Response(data, status=status.HTTP_201_CREATED, headers=headers)
 
 
-class AdHocCommandEventList(ListAPIView):
+class AdHocCommandEventList(NoTruncateMixin, ListAPIView):
 
     model = models.AdHocCommandEvent
     serializer_class = serializers.AdHocCommandEventSerializer
     search_fields = ('stdout',)
 
-    def get_serializer_context(self):
-        context = super().get_serializer_context()
-        if self.request.query_params.get('no_truncate'):
-            context.update(no_truncate=True)
-        return context
-
 
 class AdHocCommandEventDetail(RetrieveAPIView):
 
@@ -4054,7 +4042,7 @@ class AdHocCommandEventDetail(RetrieveAPIView):
         return context
 
 
-class BaseAdHocCommandEventsList(SubListAPIView):
+class BaseAdHocCommandEventsList(NoTruncateMixin, SubListAPIView):
 
     model = models.AdHocCommandEvent
     serializer_class = serializers.AdHocCommandEventSerializer
diff --git a/awx/api/views/mixin.py b/awx/api/views/mixin.py
index 546b7090f2..e7d4959dfc 100644
--- a/awx/api/views/mixin.py
+++ b/awx/api/views/mixin.py
@@ -270,3 +270,11 @@ class ControlledByScmMixin(object):
         obj = super(ControlledByScmMixin, self).get_parent_object()
         self._reset_inv_src_rev(obj)
         return obj
+
+
+class NoTruncateMixin(object):
+    def get_serializer_context(self):
+        context = super().get_serializer_context()
+        if self.request.query_params.get('no_truncate'):
+            context.update(no_truncate=True)
+        return context
diff --git a/awx/main/tests/functional/api/test_events.py b/awx/main/tests/functional/api/test_events.py
new file mode 100644
index 0000000000..00b5459eaf
--- /dev/null
+++ b/awx/main/tests/functional/api/test_events.py
@@ -0,0 +1,45 @@
+import pytest
+
+from awx.api.versioning import reverse
+from awx.main.models import AdHocCommand, AdHocCommandEvent, JobEvent
+
+
+@pytest.mark.django_db
+@pytest.mark.parametrize('truncate, expected', [
+    (True, False),
+    (False, True),
+])
+def test_job_events_sublist_truncation(get, organization_factory, job_template_factory, truncate, expected):
+    objs = organization_factory("org", superusers=['admin'])
+    jt = job_template_factory("jt", organization=objs.organization,
+                              inventory='test_inv', project='test_proj').job_template
+    job = jt.create_unified_job()
+    JobEvent.create_from_data(job_id=job.pk, uuid='abc123', event='runner_on_start',
+                              stdout='a' * 1025)
+
+    url = reverse('api:job_job_events_list', kwargs={'pk': job.pk})
+    if not truncate:
+        url += '?no_truncate=1'
+
+    response = get(url, user=objs.superusers.admin, expect=200)
+    assert (len(response.data['results'][0]['stdout']) == 1025) == expected
+
+
+@pytest.mark.django_db
+@pytest.mark.parametrize('truncate, expected', [
+    (True, False),
+    (False, True),
+])
+def test_ad_hoc_events_sublist_truncation(get, organization_factory, job_template_factory, truncate, expected):
+    objs = organization_factory("org", superusers=['admin'])
+    adhoc = AdHocCommand()
+    adhoc.save()
+    AdHocCommandEvent.create_from_data(ad_hoc_command_id=adhoc.pk, uuid='abc123', event='runner_on_start',
+                                       stdout='a' * 1025)
+
+    url = reverse('api:ad_hoc_command_ad_hoc_command_events_list', kwargs={'pk': adhoc.pk})
+    if not truncate:
+        url += '?no_truncate=1'
+
+    response = get(url, user=objs.superusers.admin, expect=200)
+    assert (len(response.data['results'][0]['stdout']) == 1025) == expected