Index: cfe/trunk/test/Index/index-module-with-vfs.m
===================================================================
--- cfe/trunk/test/Index/index-module-with-vfs.m
+++ cfe/trunk/test/Index/index-module-with-vfs.m
@@ -1,4 +1,6 @@
-// REQUIRES: shell
+// FIXME: PR43272
+// XFAIL: windows
+
 @import ModuleNeedsVFS;
 
 void foo() {
@@ -7,11 +9,11 @@
 }
 
 // RUN: rm -rf %t.cache
-// RUN: sed -e "s:INPUT_DIR:%S/Inputs:g" -e "s:OUT_DIR:%t:g" %S/Inputs/vfsoverlay.yaml > %t.yaml
+// RUN: sed -e "s@INPUT_DIR@%/S/Inputs@g" -e "s@OUT_DIR@%/t@g" %S/Inputs/vfsoverlay.yaml > %t.yaml
 // RUN: c-index-test -index-file %s -fmodules-cache-path=%t.cache -fmodules -F %t -I %t \
 // RUN:              -ivfsoverlay %t.yaml -Xclang -fdisable-module-hash | FileCheck %s
 
-// CHECK: [importedASTFile]: {{.*}}ModuleNeedsVFS.pcm | loc: 2:1 | name: "ModuleNeedsVFS" | isImplicit: 0
+// CHECK: [importedASTFile]: {{.*}}ModuleNeedsVFS.pcm | loc: 4:1 | name: "ModuleNeedsVFS" | isImplicit: 0
 // CHECK: [indexEntityReference]: kind: function | name: module_needs_vfs
 // CHECK: [indexEntityReference]: kind: function | name: base_module_needs_vfs
 
Index: cfe/trunk/test/Modules/crash-vfs-ivfsoverlay.m
===================================================================
--- cfe/trunk/test/Modules/crash-vfs-ivfsoverlay.m
+++ cfe/trunk/test/Modules/crash-vfs-ivfsoverlay.m
@@ -1,9 +1,9 @@
-// REQUIRES: crash-recovery, shell, system-darwin
+// REQUIRES: crash-recovery, system-darwin
 
 // RUN: rm -rf %t
 // RUN: mkdir -p %t/m
 // RUN: cp %S/../VFS/Inputs/actual_module2.map %t/actual_module2.map
-// RUN: sed -e "s:INPUT_DIR:%t:g" -e "s:OUT_DIR:%t/example:g" \
+// RUN: sed -e "s@INPUT_DIR@%/t@g" -e "s@OUT_DIR@%/t/example@g" \
 // RUN:   %S/../VFS/Inputs/vfsoverlay2.yaml > %t/srcvfs.yaml
 
 // RUN: not env FORCE_CLANG_DIAGNOSTICS_CRASH= TMPDIR=%t TEMP=%t TMP=%t \
Index: cfe/trunk/test/Modules/double-quotes.m
===================================================================
--- cfe/trunk/test/Modules/double-quotes.m
+++ cfe/trunk/test/Modules/double-quotes.m
@@ -1,4 +1,5 @@
-// REQUIRES: shell
+// FIXME: PR43272
+// XFAIL: windows
 
 // RUN: rm -rf %t
 // RUN: mkdir %t
@@ -6,7 +7,7 @@
 // RUN: %hmaptool write %S/Inputs/double-quotes/a.hmap.json %t/a.hmap
 // RUN: %hmaptool write %S/Inputs/double-quotes/x.hmap.json %t/x.hmap
 
-// RUN: sed -e "s:TEST_DIR:%S/Inputs/double-quotes:g" \
+// RUN: sed -e "s@TEST_DIR@%/S/Inputs/double-quotes@g" \
 // RUN:   %S/Inputs/double-quotes/z.yaml > %t/z.yaml
 
 // The output with and without modules should be the same
Index: cfe/trunk/test/Modules/framework-public-includes-private.m
===================================================================
--- cfe/trunk/test/Modules/framework-public-includes-private.m
+++ cfe/trunk/test/Modules/framework-public-includes-private.m
@@ -1,4 +1,5 @@
-// REQUIRES: shell
+// FIXME: PR43272
+// XFAIL: windows
 
 // RUN: rm -rf %t
 // RUN: mkdir %t
@@ -6,7 +7,7 @@
 // RUN: %hmaptool write %S/Inputs/framework-public-includes-private/a.hmap.json %t/a.hmap
 // RUN: %hmaptool write %S/Inputs/framework-public-includes-private/z.hmap.json %t/z.hmap
 
-// RUN: sed -e "s:TEST_DIR:%S/Inputs/framework-public-includes-private:g" \
+// RUN: sed -e "s@TEST_DIR@%/S/Inputs/framework-public-includes-private@g" \
 // RUN:   %S/Inputs/framework-public-includes-private/z.yaml > %t/z.yaml
 
 // The output with and without modules should be the same, without modules first.
Index: cfe/trunk/test/VFS/external-names.c
===================================================================
--- cfe/trunk/test/VFS/external-names.c
+++ cfe/trunk/test/VFS/external-names.c
@@ -1,6 +1,8 @@
-// RUN: sed -e "s:INPUT_DIR:%S/Inputs:g" -e "s:OUT_DIR:%t:g" -e "s:EXTERNAL_NAMES:true:" %S/Inputs/use-external-names.yaml > %t.external.yaml
-// RUN: sed -e "s:INPUT_DIR:%S/Inputs:g" -e "s:OUT_DIR:%t:g" -e "s:EXTERNAL_NAMES:false:" %S/Inputs/use-external-names.yaml > %t.yaml
-// REQUIRES: shell
+// RUN: sed -e "s@INPUT_DIR@%/S/Inputs@g" -e "s@OUT_DIR@%/t@g" -e "s@EXTERNAL_NAMES@true@" %S/Inputs/use-external-names.yaml > %t.external.yaml
+// RUN: sed -e "s@INPUT_DIR@%/S/Inputs@g" -e "s@OUT_DIR@%/t@g" -e "s@EXTERNAL_NAMES@false@" %S/Inputs/use-external-names.yaml > %t.yaml
+
+// FIXME: PR43272
+// XFAIL: windows
 
 #include "external-names.h"
 #ifdef REINCLUDE
Index: cfe/trunk/test/VFS/framework-import.m
===================================================================
--- cfe/trunk/test/VFS/framework-import.m
+++ cfe/trunk/test/VFS/framework-import.m
@@ -1,6 +1,8 @@
-// RUN: sed -e "s:INPUT_DIR:%S/Inputs:g" -e "s:OUT_DIR:%t:g" %S/Inputs/vfsoverlay.yaml > %t.yaml
+// RUN: sed -e "s@INPUT_DIR@%/S/Inputs@g" -e "s@OUT_DIR@%/t@g" %S/Inputs/vfsoverlay.yaml > %t.yaml
 // RUN: %clang_cc1 -Werror -F %t -ivfsoverlay %t.yaml -fsyntax-only %s
-// REQUIRES: shell
+
+// FIXME: PR43272
+// XFAIL: windows
 
 #import <SomeFramework/public_header.h>
 
Index: cfe/trunk/test/VFS/implicit-include.c
===================================================================
--- cfe/trunk/test/VFS/implicit-include.c
+++ cfe/trunk/test/VFS/implicit-include.c
@@ -1,6 +1,8 @@
-// RUN: sed -e "s:INPUT_DIR:%S/Inputs:g" -e "s:OUT_DIR:%t:g" %S/Inputs/vfsoverlay.yaml > %t.yaml
+// RUN: sed -e "s@INPUT_DIR@%/S/Inputs@g" -e "s@OUT_DIR@%/t@g" %S/Inputs/vfsoverlay.yaml > %t.yaml
 // RUN: %clang_cc1 -Werror -ivfsoverlay %t.yaml -I %t -include "not_real.h" -fsyntax-only %s
-// REQUIRES: shell
+
+// FIXME: PR43272
+// XFAIL: windows
 
 void foo() {
   bar();
Index: cfe/trunk/test/VFS/include-mixed-real-and-virtual.c
===================================================================
--- cfe/trunk/test/VFS/include-mixed-real-and-virtual.c
+++ cfe/trunk/test/VFS/include-mixed-real-and-virtual.c
@@ -1,9 +1,11 @@
 // RUN: rm -rf %t
 // RUN: mkdir -p %t
 // RUN: echo "void baz(void);" > %t/real.h
-// RUN: sed -e "s:INPUT_DIR:%S/Inputs:g" -e "s:OUT_DIR:%t:g" %S/Inputs/vfsoverlay.yaml > %t.yaml
+// RUN: sed -e "s@INPUT_DIR@%/S/Inputs@g" -e "s@OUT_DIR@%/t@g" %S/Inputs/vfsoverlay.yaml > %t.yaml
 // RUN: %clang_cc1 -Werror -ivfsoverlay %t.yaml -I %t -fsyntax-only %s
-// REQUIRES: shell
+
+// FIXME: PR43272
+// XFAIL: windows
 
 #include "not_real.h"
 #include "real.h"
Index: cfe/trunk/test/VFS/include-real-from-virtual.c
===================================================================
--- cfe/trunk/test/VFS/include-real-from-virtual.c
+++ cfe/trunk/test/VFS/include-real-from-virtual.c
@@ -1,9 +1,11 @@
 // RUN: rm -rf %t
 // RUN: mkdir -p %t
 // RUN: echo "void baz(void);" > %t/real.h
-// RUN: sed -e "s:INPUT_DIR:%S/Inputs:g" -e "s:OUT_DIR:%t:g" %S/Inputs/vfsoverlay.yaml > %t.yaml
+// RUN: sed -e "s@INPUT_DIR@%/S/Inputs@g" -e "s@OUT_DIR@%/t@g" %S/Inputs/vfsoverlay.yaml > %t.yaml
 // RUN: %clang_cc1 -Werror -ivfsoverlay %t.yaml -I %t -fsyntax-only %s
-// REQUIRES: shell
+
+// FIXME: PR43272
+// XFAIL: windows
 
 #include "include_real.h"
 
Index: cfe/trunk/test/VFS/include-virtual-from-real.c
===================================================================
--- cfe/trunk/test/VFS/include-virtual-from-real.c
+++ cfe/trunk/test/VFS/include-virtual-from-real.c
@@ -1,9 +1,11 @@
 // RUN: rm -rf %t
 // RUN: mkdir -p %t
 // RUN: echo '#include "not_real.h"' > %t/include_not_real.h
-// RUN: sed -e "s:INPUT_DIR:%S/Inputs:g" -e "s:OUT_DIR:%t:g" %S/Inputs/vfsoverlay.yaml > %t.yaml
+// RUN: sed -e "s@INPUT_DIR@%/S/Inputs@g" -e "s@OUT_DIR@%/t@g" %S/Inputs/vfsoverlay.yaml > %t.yaml
 // RUN: %clang_cc1 -Werror -ivfsoverlay %t.yaml -I %t -fsyntax-only %s
-// REQUIRES: shell
+
+// FIXME: PR43272
+// XFAIL: windows
 
 #include "include_not_real.h"
 
Index: cfe/trunk/test/VFS/include.c
===================================================================
--- cfe/trunk/test/VFS/include.c
+++ cfe/trunk/test/VFS/include.c
@@ -1,6 +1,8 @@
-// RUN: sed -e "s:INPUT_DIR:%S/Inputs:g" -e "s:OUT_DIR:%t:g" %S/Inputs/vfsoverlay.yaml > %t.yaml
+// RUN: sed -e "s@INPUT_DIR@%/S/Inputs@g" -e "s@OUT_DIR@%/t@g" %S/Inputs/vfsoverlay.yaml > %t.yaml
 // RUN: %clang_cc1 -Werror -I %t -ivfsoverlay %t.yaml -fsyntax-only %s
-// REQUIRES: shell
+
+// FIXME: PR43272
+// XFAIL: windows
 
 #include "not_real.h"
 
Index: cfe/trunk/test/VFS/incomplete-umbrella.m
===================================================================
--- cfe/trunk/test/VFS/incomplete-umbrella.m
+++ cfe/trunk/test/VFS/incomplete-umbrella.m
@@ -1,10 +1,12 @@
 // RUN: rm -rf %t
 // RUN: mkdir -p %t/Incomplete.framework/Headers
 // RUN: echo '// IncompleteReal.h' > %t/Incomplete.framework/Headers/IncompleteReal.h
-// RUN: sed -e "s:INPUT_DIR:%S/Inputs:g" -e "s:OUT_DIR:%t:g" %S/Inputs/vfsoverlay.yaml > %t.yaml
+// RUN: sed -e "s@INPUT_DIR@%/S/Inputs@g" -e "s@OUT_DIR@%/t@g" %S/Inputs/vfsoverlay.yaml > %t.yaml
 // RUN: not %clang_cc1 -Werror -fmodules -fimplicit-module-maps -fmodules-cache-path=%t \
 // RUN:     -ivfsoverlay %t.yaml -F %t -fsyntax-only %s 2>&1 | FileCheck %s
-// REQUIRES: shell
+
+// FIXME: PR43272
+// XFAIL: windows
 
 @import Incomplete;
 // CHECK: umbrella header for module 'Incomplete' {{.*}}IncompleteVFS.h
Index: cfe/trunk/test/VFS/module-import.m
===================================================================
--- cfe/trunk/test/VFS/module-import.m
+++ cfe/trunk/test/VFS/module-import.m
@@ -1,7 +1,9 @@
 // RUN: rm -rf %t
-// RUN: sed -e "s:INPUT_DIR:%S/Inputs:g" -e "s:OUT_DIR:%t:g" %S/Inputs/vfsoverlay.yaml > %t.yaml
+// RUN: sed -e "s@INPUT_DIR@%/S/Inputs@g" -e "s@OUT_DIR@%/t@g" %S/Inputs/vfsoverlay.yaml > %t.yaml
 // RUN: %clang_cc1 -Werror -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -ivfsoverlay %t.yaml -I %t -fsyntax-only %s
-// REQUIRES: shell
+
+// FIXME: PR43272
+// XFAIL: windows
 
 @import not_real;
 
@@ -17,7 +19,7 @@
 #endif
 
 // Override the module map (vfsoverlay2 on top)
-// RUN: sed -e "s:INPUT_DIR:%S/Inputs:g" -e "s:OUT_DIR:%t:g" %S/Inputs/vfsoverlay2.yaml > %t2.yaml
+// RUN: sed -e "s@INPUT_DIR@%/S/Inputs@g" -e "s@OUT_DIR@%/t@g" %S/Inputs/vfsoverlay2.yaml > %t2.yaml
 // RUN: %clang_cc1 -Werror -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -ivfsoverlay %t.yaml -ivfsoverlay %t2.yaml -I %t -fsyntax-only %s
 
 // vfsoverlay2 not present
Index: cfe/trunk/test/VFS/module_missing_vfs.m
===================================================================
--- cfe/trunk/test/VFS/module_missing_vfs.m
+++ cfe/trunk/test/VFS/module_missing_vfs.m
@@ -1,4 +1,3 @@
-// REQUIRES: shell
 // RUN: rm -rf %t && mkdir -p %t
 // RUN: echo "void funcA(void);" >> %t/a.h
 
@@ -6,7 +5,7 @@
 // ERROR: virtual filesystem overlay file '{{.*}}' not found
 // RUN: find %t/mcp -name "A-*.pcm" | count 1
 
-// RUN: sed -e "s:INPUT_DIR:%S/Inputs:g" -e "s:OUT_DIR:%t:g" %S/Inputs/MissingVFS/vfsoverlay.yaml > %t/vfs.yaml
+// RUN: sed -e "s@INPUT_DIR@%/S/Inputs@g" -e "s@OUT_DIR@%/t@g" %S/Inputs/MissingVFS/vfsoverlay.yaml > %t/vfs.yaml
 // RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t/mcp -I %S/Inputs/MissingVFS %s -fsyntax-only -ivfsoverlay %t/vfs.yaml
 // RUN: find %t/mcp -name "A-*.pcm" | count 1
 
Index: cfe/trunk/test/VFS/real-path-found-first.m
===================================================================
--- cfe/trunk/test/VFS/real-path-found-first.m
+++ cfe/trunk/test/VFS/real-path-found-first.m
@@ -4,11 +4,13 @@
 // intentionally rebuild modules, since the precompiled module file refers to
 // the dependency files by real path.
 
-// REQUIRES: shell
+// FIXME: PR43272
+// XFAIL: windows
+
 // RUN: rm -rf %t %t-cache %t.pch
 // RUN: mkdir -p %t/SomeFramework.framework/Modules
 // RUN: cat %S/Inputs/some_frame_module.map > %t/SomeFramework.framework/Modules/module.modulemap
-// RUN: sed -e "s:INPUT_DIR:%S/Inputs:g" -e "s:OUT_DIR:%t:g" %S/Inputs/vfsoverlay.yaml > %t.yaml
+// RUN: sed -e "s@INPUT_DIR@%/S/Inputs@g" -e "s@OUT_DIR@%/t@g" %S/Inputs/vfsoverlay.yaml > %t.yaml
 
 // Build
 // RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t-cache -F %t \
Index: cfe/trunk/test/VFS/relative-path.c
===================================================================
--- cfe/trunk/test/VFS/relative-path.c
+++ cfe/trunk/test/VFS/relative-path.c
@@ -1,8 +1,10 @@
 // RUN: mkdir -p %t
 // RUN: cd %t
-// RUN: sed -e "s:INPUT_DIR:%S/Inputs:g" -e "s:OUT_DIR:%t:g" %S/Inputs/vfsoverlay.yaml > %t.yaml
+// RUN: sed -e "s@INPUT_DIR@%/S/Inputs@g" -e "s@OUT_DIR@%/t@g" %S/Inputs/vfsoverlay.yaml > %t.yaml
 // RUN: %clang_cc1 -Werror -I . -ivfsoverlay %t.yaml -fsyntax-only %s
-// REQUIRES: shell
+
+// FIXME: PR43272
+// XFAIL: windows
 
 #include "not_real.h"
 
Index: cfe/trunk/test/VFS/subframework-symlink.m
===================================================================
--- cfe/trunk/test/VFS/subframework-symlink.m
+++ cfe/trunk/test/VFS/subframework-symlink.m
@@ -1,4 +1,5 @@
-// REQUIRES: shell
+// FIXME: PR43272
+// XFAIL: windows
 
 // Test that when a subframework is a symlink to another framework, we don't
 // add it as a submodule to the enclosing framework. We also need to make clang
@@ -17,7 +18,7 @@
 
 // Adding VFS overlay shouldn't change this behavior.
 //
-// RUN: sed -e "s:INPUT_DIR:/InvalidPath:g" -e "s:OUT_DIR:/InvalidPath:g" %S/Inputs/vfsoverlay.yaml > %t/overlay.yaml
+// RUN: sed -e "s@INPUT_DIR@/InvalidPath@g" -e "s@OUT_DIR@/InvalidPath@g" %S/Inputs/vfsoverlay.yaml > %t/overlay.yaml
 // RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t/cache2 -F %t -fsyntax-only %s -ivfsoverlay %t/overlay.yaml
 
 #import <WithSubframework/WithSubframework.h>
Index: cfe/trunk/test/VFS/test_nonmodular.c
===================================================================
--- cfe/trunk/test/VFS/test_nonmodular.c
+++ cfe/trunk/test/VFS/test_nonmodular.c
@@ -1,11 +1,9 @@
-// REQUIRES: shell
-
 // RUN: rm -rf %t
 // RUN: mkdir -p %t/vdir %t/cache %t/outdir
 // We can't have module.map inside Inputs/Nonmodular.
 // RUN: cp %S/Inputs/Nonmodular/Nonmodular.modulemap %t/outdir/module.modulemap
 //
-// RUN: sed -e "s:VDIR:%t/vdir:g" -e "s:IN_DIR:%S:g" -e "s:OUT_DIR:%t/outdir:g" %S/Inputs/Nonmodular/nonmodular-headers.yaml > %t/vdir/nonmodular-headers.yaml
+// RUN: sed -e "s@VDIR@%/t/vdir@g" -e "s@IN_DIR@%/S@g" -e "s@OUT_DIR@%/t/outdir@g" %S/Inputs/Nonmodular/nonmodular-headers.yaml > %t/vdir/nonmodular-headers.yaml
 // RUN: %clang_cc1 -fmodule-name=Nonmodular -fmodules -Wnon-modular-include-in-framework-module -verify -fimplicit-module-maps -fmodules-cache-path=%t/cache -ivfsoverlay %t/vdir/nonmodular-headers.yaml -I %S/Inputs -F %t/vdir -fsyntax-only %S/Inputs/Nonmodular/test.c
 
 // expected-no-diagnostics
Index: cfe/trunk/test/VFS/umbrella-framework-import-skipnonexist.m
===================================================================
--- cfe/trunk/test/VFS/umbrella-framework-import-skipnonexist.m
+++ cfe/trunk/test/VFS/umbrella-framework-import-skipnonexist.m
@@ -1,13 +1,13 @@
-// REQUIRES: crash-recovery, shell
+// REQUIRES: crash-recovery
 
-// FIXME: This XFAIL is cargo-culted from crash-report.c. Do we need it?
-// XFAIL: windows-gnu
+// FIXME: PR43272
+// XFAIL: windows
 
 // RUN: rm -rf %t
 // RUN: mkdir -p %t/vdir %t/outdir %t/cache
 // RUN: cp -R %S/Inputs/Bar.framework %t/outdir/
 //
-// RUN: sed -e "s:VDIR:%t/vdir:g" -e "s:OUT_DIR:%t/outdir:g" %S/Inputs/bar-headers.yaml > %t/vdir/bar-headers.yaml
+// RUN: sed -e "s@VDIR@%/t/vdir@g" -e "s@OUT_DIR@%/t/outdir@g" %S/Inputs/bar-headers.yaml > %t/vdir/bar-headers.yaml
 // RUN: rm -f %t/outdir/Bar.framework/Headers/B.h
 // RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t/cache -ivfsoverlay %t/vdir/bar-headers.yaml -F %t/vdir -fsyntax-only %s
 
Index: cfe/trunk/test/VFS/vfsroot-include.c
===================================================================
--- cfe/trunk/test/VFS/vfsroot-include.c
+++ cfe/trunk/test/VFS/vfsroot-include.c
@@ -1,7 +1,9 @@
-// REQUIRES: shell
+// FIXME: PR43272
+// XFAIL: windows
+
 // RUN: rm -rf %t
 // RUN: mkdir -p %t
-// RUN: sed -e "s:TEST_DIR:%S:g" -e "s:OUT_DIR:%t:g" %S/Inputs/vfsroot.yaml > %t.yaml
+// RUN: sed -e "s@TEST_DIR@%/S@g" -e "s@OUT_DIR@%/t@g" %S/Inputs/vfsroot.yaml > %t.yaml
 // RUN: not %clang_cc1 -Werror -ivfsoverlay %t.yaml -I %S/Inputs -I /direct-vfs-root-files -fsyntax-only /tests/vfsroot-include.c 2>&1 | FileCheck %s
 // The line above tests that the compiler input file is looked up through VFS.
 
Index: cfe/trunk/test/VFS/vfsroot-module.m
===================================================================
--- cfe/trunk/test/VFS/vfsroot-module.m
+++ cfe/trunk/test/VFS/vfsroot-module.m
@@ -1,7 +1,9 @@
-// REQUIRES: shell
+// FIXME: PR43272
+// XFAIL: windows
+
 // RUN: rm -rf %t
 // RUN: mkdir -p %t
-// RUN: sed -e "s:TEST_DIR:%S:g" -e "s:OUT_DIR:%t:g" %S/Inputs/vfsroot.yaml > %t.yaml
+// RUN: sed -e "s@TEST_DIR@%/S@g" -e "s@OUT_DIR@%/t@g" %S/Inputs/vfsroot.yaml > %t.yaml
 // RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fdisable-module-hash -fmodules-cache-path=%t/cache -ivfsoverlay %t.yaml -F %S/Inputs -fsyntax-only /tests/vfsroot-module.m
 
 // Test that a file missing from the VFS root is not found, even if it is
Index: cfe/trunk/test/VFS/vfsroot-with-overlay.c
===================================================================
--- cfe/trunk/test/VFS/vfsroot-with-overlay.c
+++ cfe/trunk/test/VFS/vfsroot-with-overlay.c
@@ -1,8 +1,10 @@
-// REQUIRES: shell
+// FIXME: PR43272
+// XFAIL: windows
+
 // RUN: rm -rf %t
 // RUN: mkdir -p %t
-// RUN: sed -e "s:TEST_DIR:%S:g" -e "s:OUT_DIR:%t:g" %S/Inputs/vfsroot.yaml > %t.yaml
-// RUN: sed -e "s:INPUT_DIR:/indirect-vfs-root-files:g" -e "s:OUT_DIR:/overlay-dir:g" %S/Inputs/vfsoverlay.yaml > %t/vfsoverlay.yaml
+// RUN: sed -e "s@TEST_DIR@%/S@g" -e "s@OUT_DIR@%/t@g" %S/Inputs/vfsroot.yaml > %t.yaml
+// RUN: sed -e "s@INPUT_DIR@/indirect-vfs-root-files@g" -e "s@OUT_DIR@/overlay-dir@g" %S/Inputs/vfsoverlay.yaml > %t/vfsoverlay.yaml
 // RUN: %clang_cc1 -Werror -ivfsoverlay %t.yaml -ivfsoverlay /direct-vfs-root-files/vfsoverlay.yaml -I /overlay-dir -fsyntax-only /tests/vfsroot-with-overlay.c
 
 #include "not_real.h"