diff --git a/clang/test/Rewriter/rewrite-byref-in-nested-blocks.mm b/clang/test/Rewriter/rewrite-byref-in-nested-blocks.mm
index 0b7f23e21368..dc8e737fc038 100644
--- a/clang/test/Rewriter/rewrite-byref-in-nested-blocks.mm
+++ b/clang/test/Rewriter/rewrite-byref-in-nested-blocks.mm
@@ -3,6 +3,7 @@
 // RUN: %clang_cc1 -x objective-c++ -Wno-return-type -fblocks -fms-extensions -rewrite-objc %s -o %t-modern-rw.cpp
 // RUN: %clang_cc1 -fsyntax-only -Werror -Wno-address-of-temporary -D"SEL=void*" -D"__declspec(X)=" %t-modern-rw.cpp
 // radar 7692350
+// XFAIL: mingw32
 
 void f(void (^block)(void));
 
diff --git a/clang/test/Rewriter/rewrite-modern-block-consts.mm b/clang/test/Rewriter/rewrite-modern-block-consts.mm
index 7761db5b7ce3..bc0e50bd9514 100644
--- a/clang/test/Rewriter/rewrite-modern-block-consts.mm
+++ b/clang/test/Rewriter/rewrite-modern-block-consts.mm
@@ -1,6 +1,7 @@
 // RUN: %clang_cc1 -x objective-c++ -Wno-return-type -fblocks -fms-extensions -rewrite-objc %s -o %t-modern-rw.cpp
 // RUN: %clang_cc1 -fsyntax-only -Werror -Wno-address-of-temporary -D"__declspec(X)=" %t-modern-rw.cpp
 // rdar:// 8243071
+// XFAIL: mingw32
 
 void x(int y) {}
 void f() {
diff --git a/clang/test/Rewriter/rewrite-modern-block.mm b/clang/test/Rewriter/rewrite-modern-block.mm
index 675d206c2c7f..dcb1c84a076a 100644
--- a/clang/test/Rewriter/rewrite-modern-block.mm
+++ b/clang/test/Rewriter/rewrite-modern-block.mm
@@ -1,6 +1,7 @@
 // RUN: %clang_cc1 -x objective-c++ -fblocks -fms-extensions -rewrite-objc %s -o %t-rw.cpp
 // RUN: %clang_cc1 -fsyntax-only -Werror -Wno-address-of-temporary -D"Class=void*" -D"id=void*" -D"SEL=void*" -D"__declspec(X)=" %t-rw.cpp
 // rdar://11230308
+// XFAIL: mingw32
 
 typedef struct {
     char byte0;
diff --git a/clang/test/Rewriter/rewrite-rewritten-initializer.mm b/clang/test/Rewriter/rewrite-rewritten-initializer.mm
index f2b0c5a173d1..6277b5c9b147 100644
--- a/clang/test/Rewriter/rewrite-rewritten-initializer.mm
+++ b/clang/test/Rewriter/rewrite-rewritten-initializer.mm
@@ -3,6 +3,7 @@
 // RUN: %clang_cc1 -x objective-c++ -Wno-return-type -fblocks -fms-extensions -rewrite-objc %s -o %t-rw-modern.cpp
 // RUN: %clang_cc1 -fsyntax-only -Werror -Wno-address-of-temporary -D"SEL=void*" -D"__declspec(X)=" %t-rw-modern.cpp
 // radar 7669784
+// XFAIL: mingw32
 
 typedef void * id;
 void *sel_registerName(const char *);