ugly, to be sure, but there it is. "acceptance testing" and variations is standard systems software testing lingo.

"User Acceptance Testing (UAT) is a process to obtain confirmation by a Subject Matter Expert (SME), preferably the owner or client of the object under test, through trial or review, that the modification or addition meets mutually agreed-upon requirements. In, UAT is one of the final stages of a project and will often occur before a client or customer accepts a new system."

"The test and acceptance phase itself, guided through a test plan and the necessary test cases."

"The plan details the schedule and steps to be taken during tactical and strategic recommendation implementation, including milestones and Acceptance Test Plans for each aspect of the implementation. Details of the plan include: .... Test and acceptance criteria