diff --git a/unleash-client-python/FeatureToggle/__init__.py b/unleash-client-python/FeatureToggle/__init__.py
index a04441e..58d2ada 100644
--- a/unleash-client-python/FeatureToggle/__init__.py
+++ b/unleash-client-python/FeatureToggle/__init__.py
@@ -333,8 +333,7 @@ def fetch_feature_toggles():
 
                     if cas_name == FeatureToggles.__cas_name and environment == FeatureToggles.__environment:
                         # Strip CAS and ENV name from feature name
-                        active_cas_env_name = f'{FeatureToggles.__cas_name}.'
-                        f'{FeatureToggles.__environment}.'
+                        active_cas_env_name = f'{cas_name}.{environment}.'
                         full_feature_name = full_feature_name.replace(active_cas_env_name, '')
                         if full_feature_name not in response:
                             response[full_feature_name] = {}