git-bisect.sh: don't accidentally override existing branch "bisect"

diff --git a/t/t1005-read-tree-reset.sh b/t/t1005-read-tree-reset.sh
index 8c4556408ecc81985acd7b8237921330c326e787..b0d31f5a9bb8b3474665147327d94ad5067fa206 100755 (executable)
--- a/t/t1005-read-tree-reset.sh
+++ b/t/t1005-read-tree-reset.sh
@@ -24,7 +24,7 @@ test_expect_success 'setup' '
 test_expect_success 'reset should work' '
   git read-tree -u --reset HEAD^ &&
   git ls-files >actual &&
-  diff -u expect actual
+  test_cmp expect actual
 '
 
 test_done