diff --git a/test/forceunwind.pass.cpp b/test/forceunwind.pass.cpp
index 4666972..a3191f8 100644
--- a/test/forceunwind.pass.cpp
+++ b/test/forceunwind.pass.cpp
@@ -9,6 +9,12 @@
 
 // REQUIRES: linux
 
+// TODO: Investigate these failures
+// XFAIL: asan, tsan, ubsan
+
+// TODO: Investigate this failure
+// XFAIL: 32bits-on-64bits
+
 // Basic test for _Unwind_ForcedUnwind.
 // See libcxxabi/test/forced_unwind* tests too.
 
diff --git a/test/frameheadercache_test.pass.cpp b/test/frameheadercache_test.pass.cpp
index 9abff5e..dd1d3dd 100644
--- a/test/frameheadercache_test.pass.cpp
+++ b/test/frameheadercache_test.pass.cpp
@@ -1,3 +1,9 @@
+// TODO: Investigate these failures
+// XFAIL: asan, tsan, ubsan
+
+// TODO: Investigate this failure
+// XFAIL: 32bits-on-64bits
+
 // The other libunwind tests don't test internal interfaces, so the include path
 // is a little wonky.
 #include "../src/config.h"
diff --git a/test/libunwind_01.pass.cpp b/test/libunwind_01.pass.cpp
index 277e3e6..aceb8be 100644
--- a/test/libunwind_01.pass.cpp
+++ b/test/libunwind_01.pass.cpp
@@ -1,3 +1,12 @@
+// TODO: Investigate these failures
+// XFAIL: asan, tsan, ubsan
+
+// TODO: Investigate these failures on x86_64 macOS
+// XFAIL: target=x86_64-apple-darwin{{.+}}
+
+// TODO: Investigate this failure
+// XFAIL: 32bits-on-64bits
+
 #include <libunwind.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/test/libunwind_02.pass.cpp b/test/libunwind_02.pass.cpp
index b188fad..64d8d58 100644
--- a/test/libunwind_02.pass.cpp
+++ b/test/libunwind_02.pass.cpp
@@ -1,3 +1,9 @@
+// TODO: Investigate these failures
+// XFAIL: asan, tsan, ubsan
+
+// TODO: Investigate this failure
+// XFAIL: 32bits-on-64bits
+
 #include <assert.h>
 #include <stdlib.h>
 #include <unwind.h>
diff --git a/test/remember_state_leak.pass.sh.s b/test/remember_state_leak.pass.sh.s
index f18d176..fceac21 100644
--- a/test/remember_state_leak.pass.sh.s
+++ b/test/remember_state_leak.pass.sh.s
@@ -2,6 +2,15 @@
 # RUN: %{build}
 # RUN: %{run}
 
+// TODO: Investigate these failures
+// XFAIL: asan, tsan, ubsan
+
+// TODO: Investigate this failure
+// XFAIL: 32bits-on-64bits
+
+# TODO: Investigate this failure on GCC.
+# XFAIL: gcc
+
 # The following assembly is a translation of this code:
 #
 #   _Unwind_Reason_Code callback(int, _Unwind_Action, long unsigned int,
diff --git a/test/signal_frame.pass.cpp b/test/signal_frame.pass.cpp
index 28f8d99..fea1897 100644
--- a/test/signal_frame.pass.cpp
+++ b/test/signal_frame.pass.cpp
@@ -9,6 +9,15 @@
 
 // Ensure that functions marked as signal frames are reported as such.
 
+// TODO: Investigate these failures
+// XFAIL: asan, tsan, ubsan
+
+// TODO: Investigate this failure on macOS
+// XFAIL: target={{.+}}-apple-darwin{{.+}}
+
+// TODO: Investigate this failure
+// XFAIL: 32bits-on-64bits
+
 // UNSUPPORTED: libunwind-arm-ehabi
 
 #include <assert.h>
diff --git a/test/signal_unwind.pass.cpp b/test/signal_unwind.pass.cpp
index c16adeb..5468c7f 100644
--- a/test/signal_unwind.pass.cpp
+++ b/test/signal_unwind.pass.cpp
@@ -10,6 +10,12 @@
 // Ensure that the unwinder can cope with the signal handler.
 // REQUIRES: linux && (target={{aarch64-.+}} || target={{x86_64-.+}})
 
+// TODO: Investigate these failures
+// XFAIL: asan, tsan, ubsan
+
+// TODO: Investigate this failure
+// XFAIL: 32bits-on-64bits
+
 #include <assert.h>
 #include <dlfcn.h>
 #include <signal.h>
diff --git a/test/unw_getcontext.pass.cpp b/test/unw_getcontext.pass.cpp
index a1f2bae..a02c8e5 100644
--- a/test/unw_getcontext.pass.cpp
+++ b/test/unw_getcontext.pass.cpp
@@ -1,3 +1,6 @@
+// TODO: Investigate these failures
+// XFAIL: asan, tsan, ubsan
+
 #include <assert.h>
 #include <libunwind.h>
 
diff --git a/test/unwind_leaffunction.pass.cpp b/test/unwind_leaffunction.pass.cpp
index a05e315..8fc3433 100644
--- a/test/unwind_leaffunction.pass.cpp
+++ b/test/unwind_leaffunction.pass.cpp
@@ -10,6 +10,12 @@
 // Ensure that leaf function can be unwund.
 // REQUIRES: linux && (target={{aarch64-.+}} || target={{x86_64-.+}})
 
+// TODO: Investigate these failures
+// XFAIL: asan, tsan, ubsan
+
+// TODO: Investigate this failure
+// XFAIL: 32bits-on-64bits
+
 #include <assert.h>
 #include <dlfcn.h>
 #include <signal.h>