Problem:    tablabel_tooltip test fails with Athena. (Dominique Pellé)
Solution:   Skip the test when using Athena. (closes #8508)

Problem:    Building fails with Athena. (Elimar Riesebieter)
Solution:   Adjust #ifdefs and add the 'drop_file' feature.

Problem:    GUI: dropping files not tested.
Solution:   Add test_gui_drop_files() and tests. (Yegappan Lakshmanan,
            closes #8434)

Problem:    Vim9: builtin function arguments not checked at compile time.
Solution:   Add more argument type specs. Check arguments to test_setmouse()
            and test_gui_mouse_event(). (Yegappan Lakshmanan, closes #8425)

Problem:    GUI mouse events not tested.
Solution:   Add test_gui_mouse_event().  Add mouse tests. Also add a few
            viminfo tests. (Yegappan Lakshmanan, closes #8407)

Problem:    MS-Windows: guifont test fails on Windows XP.
Solution:   Check windowsversion().

Problem:    MS-Windows GUI: test for 'guifont' is incomplete.
Solution:   Set 'renderoptions'. (Christian Brabandt)

Problem:    MS-Windows GUI: crash after using ":set guifont=" four times.
Solution:   Check for NULL pointer. (Ken Takata, closes #7434)

Problem:    Cannot use the help menu from a terminal window.
Solution:   Add ":tlnoremenu" commands. (Yee Cheng Chin, closes #7023)

Problem:    Tests do not check the error number properly.0
Solution:   Add a colon after the error number. (closes #6869)