diff --git a/test/lsan/TestCases/Linux/cleanup_in_tsd_destructor.c b/test/lsan/TestCases/Linux/cleanup_in_tsd_destructor.c
index 18476d5..c26d33d 100644
--- a/test/lsan/TestCases/Linux/cleanup_in_tsd_destructor.c
+++ b/test/lsan/TestCases/Linux/cleanup_in_tsd_destructor.c
@@ -8,6 +8,9 @@
 // RUN: %env_lsan_opts=$LSAN_BASE:use_tls=1 %run %t
 // RUN: %env_lsan_opts=$LSAN_BASE:use_tls=0 not %run %t 2>&1 | FileCheck %s
 
+// Investigate why it does not fail with use_stack=0
+// UNSUPPORTED: arm-linux || armhf-linux
+
 #include <assert.h>
 #include <pthread.h>
 #include <stdio.h>
diff --git a/test/lsan/TestCases/Linux/use_tls_pthread_specific_dynamic.cpp b/test/lsan/TestCases/Linux/use_tls_pthread_specific_dynamic.cpp
index 650e6ad..ecb6dbe 100644
--- a/test/lsan/TestCases/Linux/use_tls_pthread_specific_dynamic.cpp
+++ b/test/lsan/TestCases/Linux/use_tls_pthread_specific_dynamic.cpp
@@ -5,6 +5,9 @@
 // RUN: %env_lsan_opts=$LSAN_BASE:"use_tls=1" %run %t 2>&1
 // RUN: %env_lsan_opts="" %run %t 2>&1
 
+// Investigate why it does not fail with use_tls=0
+// UNSUPPORTED: arm-linux || armhf-linux
+
 #include <assert.h>
 #include <pthread.h>
 #include <stdio.h>
diff --git a/test/lsan/TestCases/disabler.c b/test/lsan/TestCases/disabler.c
index 73f1b3e..3376f7b 100644
--- a/test/lsan/TestCases/disabler.c
+++ b/test/lsan/TestCases/disabler.c
@@ -3,6 +3,9 @@
 // RUN: %clang_lsan %s -o %t
 // RUN: %env_lsan_opts=$LSAN_BASE not %run %t 2>&1 | FileCheck %s
 
+// Investigate why it does not fail with use_tls=0
+// UNSUPPORTED: arm-linux || armhf-linux
+
 #include <stdio.h>
 #include <stdlib.h>
 
diff --git a/test/lsan/TestCases/do_leak_check_override.cpp b/test/lsan/TestCases/do_leak_check_override.cpp
index 40a9763..3503eb0 100644
--- a/test/lsan/TestCases/do_leak_check_override.cpp
+++ b/test/lsan/TestCases/do_leak_check_override.cpp
@@ -6,6 +6,9 @@
 // RUN: %env_lsan_opts=$LSAN_BASE not %run %t 2>&1 | FileCheck --check-prefix=CHECK-strict %s
 // RUN: %env_lsan_opts=$LSAN_BASE not %run %t foo 2>&1 | FileCheck --check-prefix=CHECK-normal %s
 
+// Investigate why LeakyGlobal leak does show
+// UNSUPPORTED: arm-linux || armhf-linux
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <sanitizer/lsan_interface.h>
diff --git a/test/lsan/TestCases/ignore_object.c b/test/lsan/TestCases/ignore_object.c
index 92f03ee..e5fc012 100644
--- a/test/lsan/TestCases/ignore_object.c
+++ b/test/lsan/TestCases/ignore_object.c
@@ -3,6 +3,9 @@
 // RUN: %clang_lsan %s -o %t
 // RUN: %env_lsan_opts=$LSAN_BASE not %run %t 2>&1 | FileCheck %s
 
+// Investigate why it does not fail with use_stack=0
+// UNSUPPORTED: arm-linux || armhf-linux
+
 #include <stdio.h>
 #include <stdlib.h>
 
diff --git a/test/lsan/TestCases/use_after_return.cpp b/test/lsan/TestCases/use_after_return.cpp
index 5c60ec6..decab6c 100644
--- a/test/lsan/TestCases/use_after_return.cpp
+++ b/test/lsan/TestCases/use_after_return.cpp
@@ -6,6 +6,9 @@
 // RUN: ASAN_OPTIONS=$ASAN_OPTIONS:detect_stack_use_after_return=1 %env_lsan_opts=$LSAN_BASE:"use_stacks=1" %run %t 2>&1
 // RUN: ASAN_OPTIONS=$ASAN_OPTIONS:detect_stack_use_after_return=1 %env_lsan_opts="" %run %t 2>&1
 
+// Investigate why it does not fail with use_stack=0
+// UNSUPPORTED: arm-linux || armhf-linux
+
 #include <stdio.h>
 #include <stdlib.h>
 #include "sanitizer_common/print_address.h"