Due to the peculiarities of how Blackboard roles are defined, instructors are only able to preview a test while in Student Preview mode. The only small hitch in this process is when tests are not currently available to students, such as when they are only made available during a certain date range. The following steps will allow you to preview a test in Student Preview mode without opening the test up to all students.
Doing this adds a 'preview user' unique to the instructor's account to the roster.
Note - The following steps will only apply if Test availability is set to "Yes" and the test is set to open at a date in the future. If the test availability is set to "No" it must be set to "Yes" during step 6 below.
Select the preview user from the list of users on the roster and click Submit.
In the "Test Availability Exceptions" area, set the number of attempts for the preview user (for example, Unlimited attempts) and then the date range the preview user can have access to the test, making sure that the start time has already passed. When complete, click Submit.
Enter student preview mode and navigate to the test. It should be visible and the preview user should now be able to Begin it.
Once complete the availability exception should be reverted. Alternately, exit student preview mode and select the first option to delete preview user data.