Sorry, I committed into wrong branch. So reverted it.
diff --git a/Tools/buildbot/test.bat b/Tools/buildbot/test.bat
index 72cca59..3764b43 100644
--- a/Tools/buildbot/test.bat
+++ b/Tools/buildbot/test.bat
@@ -1,4 +1,3 @@
 @rem Used by the buildbot "test" step.

 cd PCbuild

-python_d -m test.test_ttk_guionly

-call rt.bat -d -q -uall -rw -x test.test_ttk_guionly

+call rt.bat -d -q -uall -rw