diff --git a/clang/test/Driver/darwin-header-search-libcxx.cpp b/clang/test/Driver/darwin-header-search-libcxx.cpp
index 98bd0954481a..9113b291e707 100644
--- a/clang/test/Driver/darwin-header-search-libcxx.cpp
+++ b/clang/test/Driver/darwin-header-search-libcxx.cpp
@@ -1,3 +1,5 @@
+// UNSUPPORTED: system-windows
+
 // General tests that the header search paths for libc++ detected by the driver
 // and passed to CC1 are correct on Darwin platforms.
 
diff --git a/clang/test/Driver/darwin-header-search-libstdcxx.cpp b/clang/test/Driver/darwin-header-search-libstdcxx.cpp
index 480fb8c6de9e..ce9d2c1b7eba 100644
--- a/clang/test/Driver/darwin-header-search-libstdcxx.cpp
+++ b/clang/test/Driver/darwin-header-search-libstdcxx.cpp
@@ -1,3 +1,5 @@
+// UNSUPPORTED: system-windows
+
 // General tests that the header search paths for libstdc++ detected by the
 // driver and passed to CC1 are correct on Darwin platforms.
 
diff --git a/clang/test/Driver/darwin-header-search-system.cpp b/clang/test/Driver/darwin-header-search-system.cpp
index 790be5059641..3d16c7d2d2f5 100644
--- a/clang/test/Driver/darwin-header-search-system.cpp
+++ b/clang/test/Driver/darwin-header-search-system.cpp
@@ -1,3 +1,5 @@
+// UNSUPPORTED: system-windows
+
 // General tests that the system header search paths detected by the driver
 // and passed to CC1 are correct on Darwin platforms.