Index: Paste-3.5.2/tests/cgiapp_data/form.cgi
===================================================================
--- Paste-3.5.2.orig/tests/cgiapp_data/form.cgi
+++ Paste-3.5.2/tests/cgiapp_data/form.cgi
@@ -2,6 +2,11 @@
 
 from __future__ import print_function
 
+import warnings
+# Since the Paste machinery expects these scripts to return no stderr,
+# filter all DeprecationWarnings
+warnings.simplefilter("ignore", category=DeprecationWarning)
+
 import cgi
 import six