PHPUnit can't connect the oracle DB

I have migrated all the MySQL data to SQLite, replace MySQL function (like date_format, concat etc). But the main problem is, I have some data in Oracle DB. On production server everything is good. But when I tried to test the class, PHPUnit can not connect to oracle. I get error like this:

Fatal error: Call to undefined function yajra\Pdo\oci_connect() in C:\wamp\www\usfoot\vendor\yajra\laravel-pdo-via-oci8\src\yajra\PDo\Oci8.php on line 21