diff --git a/test/CAS/include-tree.swift b/test/CAS/include-tree.swift
index c396a8053c31e..91314d1aff185 100644
--- a/test/CAS/include-tree.swift
+++ b/test/CAS/include-tree.swift
@@ -1,3 +1,6 @@
+// rdar://119964830 Temporarily disabling in Linux
+// UNSUPPORTED: OS=linux-gnu
+
 // RUN: %empty-directory(%t)
 // RUN: split-file %s %t