diff --git a/tcp_tests/managers/execute_commands.py b/tcp_tests/managers/execute_commands.py
index de9ab3b..6b52953 100644
--- a/tcp_tests/managers/execute_commands.py
+++ b/tcp_tests/managers/execute_commands.py
@@ -113,7 +113,7 @@
 
                 # Workaround of exit code 0 from salt in case of failures
                 failed = 0
-                for s in result['stdout']:
+                for s in result['stdout'] + result['stderr']:
                     if s.startswith("Failed:"):
                         failed += int(s.split("Failed:")[1])
                     if 'Minion did not return. [No response]' in s: