diff --git a/avocado/utils/lv_utils.py b/avocado/utils/lv_utils.py
index 47ab1fb4b3e59a295b79b8cd08c432983cbcff35..2640dc349995565232969e718875c780de47e7e4 100644
--- a/avocado/utils/lv_utils.py
+++ b/avocado/utils/lv_utils.py
@@ -444,7 +444,7 @@ def lv_take_snapshot(vg_name, lv_name,
         process.run(cmd, sudo=True)
     except process.CmdError as ex:
         if ('Logical volume "%s" already exists in volume group "%s"'
-            % (lv_snapshot_name, vg_name) in ex.result_obj.stderr and
+            % (lv_snapshot_name, vg_name) in ex.result.stderr and
             re.search(re.escape(lv_snapshot_name + " [active]"),
                       process.run("lvdisplay", sudo=True).stdout)):
             # the above conditions detect if merge of snapshot was postponed