diff --git a/Lib/distutils/command/bdist_wininst.py b/Lib/distutils/command/bdist_wininst.py

index 0871a4f..8796b68 100644

--- a/Lib/distutils/command/bdist_wininst.py

+++ b/Lib/distutils/command/bdist_wininst.py

@@ -12,6 +12,8 @@ from distutils.sysconfig import get_python_version

 from distutils import log

 class bdist_wininst(Command):

+    # Marker for tests that we have the unsupported bdist_wininst

+    _unsupported = True

     description = "create an executable installer for MS Windows"