diff --git a/openmp/runtime/test/lit.cfg b/openmp/runtime/test/lit.cfg
--- a/openmp/runtime/test/lit.cfg
+++ b/openmp/runtime/test/lit.cfg
@@ -108,6 +108,9 @@
 if config.operating_system in ['Linux', 'Windows']:
     config.available_features.add('affinity')
 
+if config.operating_system == 'Windows':
+    config.environment['__COMPAT_LAYER'] = 'RunAsInvoker'
+
 import multiprocessing
 try:
     if multiprocessing.cpu_count() > 1: