diff --git a/news/77.bugfix b/news/77.bugfix
new file mode 100644
index 0000000..7aa576c
--- /dev/null
+++ b/news/77.bugfix
@@ -0,0 +1 @@
+fix waitress deprecation warning
\ No newline at end of file
diff --git a/src/plone/testing/zope.py b/src/plone/testing/zope.py
index 01ac3bb..f59a53d 100644
--- a/src/plone/testing/zope.py
+++ b/src/plone/testing/zope.py
@@ -917,7 +917,7 @@ def setUpServer(self):
         """Create a WSGI server instance and save it in self.server.
         """
         app = self.make_wsgi_app()
-        kwargs = {}
+        kwargs = {'clear_untrusted_proxy_headers': False}
         if self.host is not None:
             kwargs['host'] = self.host
         if self.port is not None: