fix bsd shell negation

diff --git a/t/t3400-rebase.sh b/t/t3400-rebase.sh
index 95e33b52100bb360ab3fcfa1b419b66321340b8a..fdad7dad611b385f05779826bfa74f33d1f28d03 100755 (executable)
--- a/t/t3400-rebase.sh
+++ b/t/t3400-rebase.sh
@@ -42,15 +42,15 @@ test_expect_success \
 test_expect_success 'rebase against master' '
      git rebase master'
 
-test_expect_failure \
+test_expect_success \
     'the rebase operation should not have destroyed author information' \
-    'git log | grep "Author:" | grep "<>"'
+    '! (git log | grep "Author:" | grep "<>")'
 
 test_expect_success 'rebase after merge master' '
      git reset --hard topic &&
      git merge master &&
      git rebase master &&
-     ! git show | grep "^Merge:"
+     ! (git show | grep "^Merge:")
 '
 
 test_expect_success 'rebase of history with merges is linearized' '