diff --git a/sahara_dashboard/content/data_processing/clusters/cluster_templates/workflows/create.py b/sahara_dashboard/content/data_processing/clusters/cluster_templates/workflows/create.py
index 2767025f..b64318c3 100644
--- a/sahara_dashboard/content/data_processing/clusters/cluster_templates/workflows/create.py
+++ b/sahara_dashboard/content/data_processing/clusters/cluster_templates/workflows/create.py
@@ -328,7 +328,7 @@ class ConfigureClusterTemplate(whelpers.ServiceParametersWorkflow,
                      ConfigureNodegroups)
 
     def __init__(self, request, context_seed, entry_point, *args, **kwargs):
-        ConfigureClusterTemplate._cls_registry = set([])
+        ConfigureClusterTemplate._cls_registry = []
 
         hlps = helpers.Helpers(request)
         plugin, hadoop_version = whelpers.\
diff --git a/sahara_dashboard/content/data_processing/clusters/clusters/workflows/scale.py b/sahara_dashboard/content/data_processing/clusters/clusters/workflows/scale.py
index 5f7fc6fb..482049cf 100644
--- a/sahara_dashboard/content/data_processing/clusters/clusters/workflows/scale.py
+++ b/sahara_dashboard/content/data_processing/clusters/clusters/workflows/scale.py
@@ -40,7 +40,7 @@ class ScaleCluster(cl_create_flow.ConfigureCluster,
     default_steps = (NodeGroupsStep, )
 
     def __init__(self, request, context_seed, entry_point, *args, **kwargs):
-        ScaleCluster._cls_registry = set([])
+        ScaleCluster._cls_registry = []
 
         self.success_message = _("Scaled cluster successfully started.")