diff --git a/awx/api/serializers.py b/awx/api/serializers.py
index 431c2bb19e..4790fb08d1 100644
--- a/awx/api/serializers.py
+++ b/awx/api/serializers.py
@@ -3376,7 +3376,7 @@ class SystemJobSerializer(UnifiedJobSerializer):
         except StdoutMaxBytesExceeded as e:
             return _(
                 "Standard Output too large to display ({text_size} bytes), "
-                "only download supported for sizes over {supported_size} bytes").format(
+                "only download supported for sizes over {supported_size} bytes.").format(
                     text_size=e.total, supported_size=e.supported
             )
 
diff --git a/awx/api/views.py b/awx/api/views.py
index ad96bf1a23..01ee6a372d 100644
--- a/awx/api/views.py
+++ b/awx/api/views.py
@@ -4687,7 +4687,7 @@ class UnifiedJobStdout(RetrieveAPIView):
         except StdoutMaxBytesExceeded as e:
             response_message = _(
                 "Standard Output too large to display ({text_size} bytes), "
-                "only download supported for sizes over {supported_size} bytes").format(
+                "only download supported for sizes over {supported_size} bytes.").format(
                     text_size=e.total, supported_size=e.supported
             )
             if request.accepted_renderer.format == 'json':
diff --git a/awx/main/tests/functional/api/test_unified_jobs_stdout.py b/awx/main/tests/functional/api/test_unified_jobs_stdout.py
index 6cec0ab4fe..f51920fd41 100644
--- a/awx/main/tests/functional/api/test_unified_jobs_stdout.py
+++ b/awx/main/tests/functional/api/test_unified_jobs_stdout.py
@@ -169,7 +169,7 @@ def test_text_stdout_with_max_stdout(sqlite_copy_expert, get, admin):
     response = get(url, user=admin, expect=200)
     assert response.data['result_stdout'] == (
         'Standard Output too large to display ({actual} bytes), only download '
-        'supported for sizes over {max} bytes'.format(
+        'supported for sizes over {max} bytes.'.format(
             actual=total_bytes,
             max=settings.STDOUT_MAX_BYTES_DISPLAY
         )
@@ -195,7 +195,7 @@ def test_max_bytes_display(sqlite_copy_expert, Parent, Child, relation, view, fm
     response = get(url + '?format={}'.format(fmt), user=admin, expect=200)
     assert response.content == (
         'Standard Output too large to display ({actual} bytes), only download '
-        'supported for sizes over {max} bytes'.format(
+        'supported for sizes over {max} bytes.'.format(
             actual=total_bytes,
             max=settings.STDOUT_MAX_BYTES_DISPLAY
         )
@@ -243,7 +243,7 @@ def test_legacy_result_stdout_with_max_bytes(Cls, view, fmt, get, admin):
     response = get(url + '?format={}'.format(fmt), user=admin, expect=200)
     assert response.content == (
         'Standard Output too large to display ({actual} bytes), only download '
-        'supported for sizes over {max} bytes'.format(
+        'supported for sizes over {max} bytes.'.format(
             actual=total_bytes,
             max=settings.STDOUT_MAX_BYTES_DISPLAY
         )