diff --git a/clang/test/CodeGen/thinlto_backend.ll b/clang/test/CodeGen/thinlto_backend.ll
index 5b1964ac7d5a..17e8183680b3 100644
--- a/clang/test/CodeGen/thinlto_backend.ll
+++ b/clang/test/CodeGen/thinlto_backend.ll
@@ -1,4 +1,5 @@
-; REQUIRES: x86-registered-target
+; shell required since the windows bot does not like the "(cd ..."
+; REQUIRES: x86-registered-target, shell
 
 ; RUN: opt -module-summary -o %t1.o %s
 ; RUN: opt -module-summary -o %t2.o %S/Inputs/thinlto_backend.ll