diff --git a/t/t6000lib.sh b/t/t6000lib.sh
--- a/t/t6000lib.sh
+++ b/t/t6000lib.sh
export GIT_AUTHOR_EMAIL="$_author"
"$@"
- export GIT_AUTHOR_EMAIL="$_save"
+ if test -z "$_save"
+ then
+ unset GIT_AUTHOR_EMAIL
+ else
+ export GIT_AUTHOR_EMAIL="$_save"
+ fi
}
commit_date()