diff --git a/tempest/common/utils/__init__.py b/tempest/common/utils/__init__.py
index 5a86caa..aa81864 100644
--- a/tempest/common/utils/__init__.py
+++ b/tempest/common/utils/__init__.py
@@ -78,7 +78,7 @@
         decorators.attr(type=list(args))(f)
 
         @functools.wraps(f)
-        def wrapper(self, *func_args, **func_kwargs):
+        def wrapper(*func_args, **func_kwargs):
             service_list = get_service_list()
 
             for service in args:
@@ -86,7 +86,7 @@
                     msg = 'Skipped because the %s service is not available' % (
                         service)
                     raise testtools.TestCase.skipException(msg)
-            return f(self, *func_args, **func_kwargs)
+            return f(*func_args, **func_kwargs)
         return wrapper
     return decorator
 
diff --git a/tempest/lib/decorators.py b/tempest/lib/decorators.py
index ef1003b..acbb7be 100644
--- a/tempest/lib/decorators.py
+++ b/tempest/lib/decorators.py
@@ -56,9 +56,9 @@
     """
     def decorator(f):
         @functools.wraps(f)
-        def wrapper(self, *func_args, **func_kwargs):
+        def wrapper(*func_args, **func_kwargs):
             try:
-                return f(self, *func_args, **func_kwargs)
+                return f(*func_args, **func_kwargs)
             except Exception as exc:
                 exc_status_code = getattr(exc, 'status_code', None)
                 if status_code is None or status_code == exc_status_code: