diff --git a/src/dbrownell_Common/Streams/StreamDecorator.py b/src/dbrownell_Common/Streams/StreamDecorator.py
index a105aec..4526f90 100644
--- a/src/dbrownell_Common/Streams/StreamDecorator.py
+++ b/src/dbrownell_Common/Streams/StreamDecorator.py
@@ -117,7 +117,7 @@ def PrefixOrSuffixTToCallable(
             capabilities = lowest_capabilities
 
         else:
-            capabilities = Capabilities()
+            capabilities = Capabilities(ignore_environment=True)
 
         Capabilities.Set(self, capabilities)