VSW5 is employed by The Open Group in its conformance branding program for X Windows and the Common Desktop Environment (CDE).

VSW5 features include:

• Superset of the latest X Consortium test suite.
• The industry's first tests for the X Toolkit Intrinsics (Xt) interfaces.
• Tests for all X11R5 Xlib interfaces including I18N, XCMS, etc.
• Tests for the SHAPE extension.
• Tests for the Input Device extension.
• Implementation under the Test Environment Toolkit (TET), facilitating easy integration with existing test suites.
• Sophisticated test report generator facilitates analyzing problems and achieving compliance.
• Utility for comparing results from multiple test runs facilitates regression testing.
• Available at a reduced price in a VSW5 Lite configuration for use in testing X servers.

VSW5 can be licensed through ApTest for use in Open Group branding or for other purposes.