diff --git a/tests/test-check-code-hg.t b/tests/test-check-code-hg.t
--- a/tests/test-check-code-hg.t
+++ b/tests/test-check-code-hg.t
@@ -1,6 +1,6 @@
   $ check_code="$TESTDIR"/../contrib/check-code.py
   $ cd "$TESTDIR"/..
-  $ if hg identify -q > /dev/null; then :
+  $ if hg identify -q > /dev/null 2>&1; then :
   > else
   >     echo "skipped: not a Mercurial working dir" >&2
   >     exit 80
@@ -8,8 +8,9 @@
 
 New errors are not allowed. Warnings are strongly discouraged.
 
-  $ hg manifest | xargs "$check_code" --warnings --nolineno --per-file=0 \
-  > || false
+  $ hg manifest 2>/dev/null \
+  >   | xargs "$check_code" --warnings --nolineno --per-file=0 \
+  >   || false
   tests/test-serve.t:0:
    >   >        kill `cat hg.pid`
    don't use kill, use killdaemons.py