diff --git a/test/BugPoint/misopt-basictest.ll b/test/BugPoint/misopt-basictest.ll
index e59b4ed..bed7c5c 100644
--- a/test/BugPoint/misopt-basictest.ll
+++ b/test/BugPoint/misopt-basictest.ll
@@ -1,4 +1,6 @@
 ; RUN: bugpoint %s -dce -bugpoint-deletecalls -simplifycfg -silence-passes
+; XFAIL: *
+; See PR2453
 
 @.LC0 = internal global [13 x i8] c"Hello World\0A\00"          ; <[13 x i8]*> [#uses=1]
 
diff --git a/test/FrontendC++/2006-11-30-NoCompileUnit.cpp b/test/FrontendC++/2006-11-30-NoCompileUnit.cpp
index c225eb7..70fc642 100644
--- a/test/FrontendC++/2006-11-30-NoCompileUnit.cpp
+++ b/test/FrontendC++/2006-11-30-NoCompileUnit.cpp
@@ -8,6 +8,8 @@
 // RUN: gdb -q -batch -n -x %t2 NoCompileUnit.exe | \
 // RUN:   tee NoCompileUnit.out | not grep {"low == high"}
 // XFAIL: alpha|ia64|arm
+// XFAIL: *
+// See PR2454
 
 
 class MamaDebugTest {
diff --git a/test/FrontendC/2003-08-21-WideString.c b/test/FrontendC/2003-08-21-WideString.c
index 0a833dc..ae0783e 100644
--- a/test/FrontendC/2003-08-21-WideString.c
+++ b/test/FrontendC/2003-08-21-WideString.c
@@ -1,4 +1,6 @@
 // RUN: %llvmgcc -S %s -o - | llvm-as -f -o /dev/null
+// XFAIL: *
+// See PR2425
 
 struct {
   int *name;
diff --git a/test/FrontendC/2004-02-13-IllegalVararg.c b/test/FrontendC/2004-02-13-IllegalVararg.c
index b6e5f2c..0607330 100644
--- a/test/FrontendC/2004-02-13-IllegalVararg.c
+++ b/test/FrontendC/2004-02-13-IllegalVararg.c
@@ -1,4 +1,6 @@
 // RUN: %llvmgcc -xc %s -w -c -o - | llc
+// XFAIL: *
+// See PR2425
 
 #include <stdarg.h>
 
diff --git a/test/FrontendC/2006-09-18-fwrite-cast-crash.c b/test/FrontendC/2006-09-18-fwrite-cast-crash.c
index 0e02907..fa64999 100644
--- a/test/FrontendC/2006-09-18-fwrite-cast-crash.c
+++ b/test/FrontendC/2006-09-18-fwrite-cast-crash.c
@@ -1,5 +1,7 @@
 // RUN: %llvmgcc %s -S -o /dev/null
 // PR910
+// XFAIL: *
+// See PR2425
 
 struct l_struct_2E_FILE { char x; };
 unsigned fwrite(signed char *, unsigned , unsigned , signed char *);
diff --git a/test/FrontendC/2007-09-05-ConstCtor.c b/test/FrontendC/2007-09-05-ConstCtor.c
index c267a59..0b06cc8 100644
--- a/test/FrontendC/2007-09-05-ConstCtor.c
+++ b/test/FrontendC/2007-09-05-ConstCtor.c
@@ -1,5 +1,7 @@
 // RUN: %llvmgcc -xc -Os -c %s -o /dev/null
 // PR1641
+// XFAIL: *
+// See PR2425
 
 struct A {
   unsigned long l;
diff --git a/test/FrontendC/2007-09-28-PackedUnionMember.c b/test/FrontendC/2007-09-28-PackedUnionMember.c
index 1e64657..be244d5 100644
--- a/test/FrontendC/2007-09-28-PackedUnionMember.c
+++ b/test/FrontendC/2007-09-28-PackedUnionMember.c
@@ -1,4 +1,7 @@
 // RUN: %llvmgcc %s -S -o -
+// XFAIL: *
+// See PR2425
+
 #pragma pack(push, 2)
 struct H {
   unsigned long f1;