Change Wordpress Title
CiviCRM content displays in WordPress in two separate ways.  The first is through shortcodes: when you insert a CiviCRM shortcode in a page, CiviCRM renders the corresponding form.

CiviCRM still needs to render pages even if nobody has entered shortcodes for them, so the second method gives long URLs such as http://yoursite.org/civicrm?page=CiviCRM&amp;q=civicrm/contribute/transact&amp;reset=1&amp;id=1  These URLs actually take the page that's before the question mark and replace all the content.  It used to be (4.5.x and earlier) that this would be your site's home page by default, but now it defaults to a page titled "CiviCRM" with the slug civicrm.

I think this is what's generating the page title you're seeing: "CiviCRM" is the title of the base page, and "civiCRM_test — Wordpress" is your site name.  Set the site name in your WordPress settings, and set the base page title by visiting the page you get when you edit the URL to remove the question mark and everything after it.  Change the page title, and that should change it for all CiviCRM pages with the long URL style.