diff --git a/test/CAS/path_remap.swift b/test/CAS/path_remap.swift
index 80c879c80345..ecd57ec7dae8 100644
--- a/test/CAS/path_remap.swift
+++ b/test/CAS/path_remap.swift
@@ -1,3 +1,5 @@
+// UNSUPPORTED: OS=windows-msvc
+
 // RUN: %empty-directory(%t)
 // RUN: split-file %s %t