diff --git a/tests/test-copy b/tests/test-copy
--- a/tests/test-copy
+++ b/tests/test-copy
@@ -13,6 +13,8 @@ hg -d commit -t "2" -u test -d "0 0"
 hg history
 hg log a
 hexdump -C .hg/data/b.d
-hg cat b | md5sum
-hg cat a | md5sum
+hg cat b > bsum
+md5sum bsum
+hg cat a > asum
+md5sum asum
 hg verify
diff --git a/tests/test-copy.out b/tests/test-copy.out
--- a/tests/test-copy.out
+++ b/tests/test-copy.out
@@ -39,11 +39,11 @@ 00000030  36 38 65 33 0a 63 6f 70  79 3a
 00000040  0a                                                |.|
 00000041
 + hg cat b
-+ md5sum
-60b725f10c9c85c70d97880dfe8191b3  -
++ md5sum bsum
+60b725f10c9c85c70d97880dfe8191b3  bsum
 + hg cat a
-+ md5sum
-60b725f10c9c85c70d97880dfe8191b3  -
++ md5sum asum
+60b725f10c9c85c70d97880dfe8191b3  asum
 + hg verify
 checking changesets
 checking manifests