Revert "fix one test"

This reverts commit 20c29d2a3ba631db56d19c9f3a5cef7a67676377.
Revert "test"

This reverts commit 6d04eaf291b2a9bd3a4fae222c9704a9d033d93a.
Revert "fix encoding issue"

This reverts commit 1a1e8cbab9cb92ad44975783b22056ac54d9aa53.
unset variable