Index: utils/lit/tests/Inputs/shtest-timeout/lit.cfg
===================================================================
--- utils/lit/tests/Inputs/shtest-timeout/lit.cfg
+++ utils/lit/tests/Inputs/shtest-timeout/lit.cfg
@@ -13,9 +13,7 @@
     externalShell = False
 else:
     lit_config.note('Using external shell')
-    externalShell = (not sys.platform in ['win32'])
-    if not externalShell:
-        lit_config.note('External shell requested, but using internal shell')
+    externalShell = True
 
 configSetTimeout = lit_config.params.get('set_timeout', '0')
 
Index: utils/lit/tests/shtest-timeout.py
===================================================================
--- utils/lit/tests/shtest-timeout.py
+++ utils/lit/tests/shtest-timeout.py
@@ -1,7 +1,7 @@
 # REQUIRES: python-psutil
 
-# PR33944
-# XFAIL: windows
+# llvm.org/PR33944
+# REQUIRES: nowindows
 
 # FIXME: This test is fragile because it relies on time which can
 # be affected by system performance. In particular we are currently