diff --git a/fuelclient/cli/actions/deployment_tasks.py b/fuelclient/cli/actions/deployment_tasks.py
index e20f702f..62738925 100644
--- a/fuelclient/cli/actions/deployment_tasks.py
+++ b/fuelclient/cli/actions/deployment_tasks.py
@@ -68,7 +68,7 @@ class DeploymentTasksAction(Action):
 
         """
         client = DeploymentHistoryClient()
-        tasks_names = getattr(params, 'task-name')
+        tasks_names = getattr(params, 'task-name', None)
         group_by_tasks = bool(tasks_names)
         statuses = params.status.split(',') if params.status else []
         nodes = params.node.split(',') if params.node else []
diff --git a/fuelclient/cli/formatting.py b/fuelclient/cli/formatting.py
index f61c98f9..a2e1b447 100644
--- a/fuelclient/cli/formatting.py
+++ b/fuelclient/cli/formatting.py
@@ -98,7 +98,7 @@ def format_table(data, acceptable_keys=None, column_to_join=None):
         for cell_line_no in range(max_cell_lines):
             output_lines.append(
                 row_template.format(
-                    *list(
+                    *(
                         cell[cell_line_no] if len(cell) > cell_line_no else u""
                         for cell in row
                     )