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':