#5636: fix next -> __next__ in csv reader docs.
diff --git a/Lib/test/test_xmlrpc.py b/Lib/test/test_xmlrpc.py
index d1ed40f..1f5f5aa 100644
--- a/Lib/test/test_xmlrpc.py
+++ b/Lib/test/test_xmlrpc.py
@@ -598,7 +598,11 @@
         sys.stdin = open("xmldata.txt", "r")
         sys.stdout = open(support.TESTFN, "w")
 
-        self.cgi.handle_request()
+        os.environ['CONTENT_LENGTH'] = str(len(data))
+        try:
+            self.cgi.handle_request()
+        finally:
+            del os.environ['CONTENT_LENGTH']
 
         sys.stdin.close()
         sys.stdout.close()