diff --git a/tests/test-gendoc b/tests/test-gendoc
--- a/tests/test-gendoc
+++ b/tests/test-gendoc
@@ -11,7 +11,7 @@ for PO in C $TESTDIR/../i18n/*.po; do
     echo "% extracting documentation from $LOCALE"
     echo ".. -*- coding: utf-8 -*-" > gendoc-$LOCALE.txt
     echo "" >> gendoc-$LOCALE.txt
-    LC_ALL=$LOCALE python $TESTDIR/../doc/gendoc.py >> gendoc-$LOCALE.txt || exit
+    LC_ALL=$LOCALE python $TESTDIR/../doc/gendoc.py >> gendoc-$LOCALE.txt 2> /dev/null || exit
 
     # We call runrst without adding "--halt warning" to make it report
     # all errors instead of stopping on the first one.