diff --git a/libc/arch-arm/cortex-a7/bionic/memcpy_base.S b/libc/arch-arm/cortex-a7/bionic/memcpy_base.S
index 1d152bb..4ff982b 100644
--- a/libc/arch-arm/cortex-a7/bionic/memcpy_base.S
+++ b/libc/arch-arm/cortex-a7/bionic/memcpy_base.S
@@ -101,16 +101,38 @@
         vld1.8      {d0}, [r1]!
         vst1.8      {d0}, [r0, :64]!
 
-2:      // Make sure we have at least 64 bytes to copy.
+2:      cmp         r2, #256
+        ble         .L_copy_loop
+
+        // Make sure DST is 64 BYTE aligned.
+        rsb         r3, r0, #0
+        ands        r3, r3, #0x30
+        beq         .L_copy_loop
+
+        sub         r2, r2, r3
+        cmp         r3, #0x10
+        beq         .L_copy_16
+
+        vld1.8      {d0  - d3},   [r1]!
+        vst1.8      {d0  - d3},   [r0, :128]!
+        ands        r3, r3, #0x10
+        beq         .L_copy_loop
+
+.L_copy_16:
+        vld1.8      {d0, d1}, [r1]!
+        vst1.8      {d0, d1}, [r0, :128]!
+
+.L_copy_loop:
+        // Make sure we have at least 64 bytes to copy.
         subs        r2, r2, #64
         blo         2f
 
 1:      // The main loop copies 64 bytes at a time.
         vld1.8      {d0  - d3},   [r1]!
-        vld1.8      {d4  - d7},   [r1]!
+        vst1.8      {d0  - d3},   [r0, :128]!
         pld         [r1, #(64*4)]
         subs        r2, r2, #64
-        vst1.8      {d0  - d3},   [r0, :128]!
+        vld1.8      {d4  - d7},   [r1]!
         vst1.8      {d4  - d7},   [r0, :128]!
         bhs         1b
 
diff --git a/libc/bionic/system_properties.cpp b/libc/bionic/system_properties.cpp
index e925d23..5aefbaf 100644
--- a/libc/bionic/system_properties.cpp
+++ b/libc/bionic/system_properties.cpp
@@ -56,6 +56,7 @@
 #include "private/bionic_futex.h"
 #include "private/bionic_lock.h"
 #include "private/bionic_macros.h"
+#include "private/bionic_sdk_version.h"
 #include "private/libc_logging.h"
 
 static const char property_service_socket[] = "/dev/socket/" PROP_SERVICE_NAME;
@@ -1265,6 +1266,11 @@
 
 const prop_info *__system_property_find_nth(unsigned n)
 {
+    if (bionic_get_application_target_sdk_version() >= __ANDROID_API_O__) {
+      __libc_fatal("__system_property_find_nth is not supported since Android O,"
+                   " please use __system_property_foreach instead.");
+    }
+
     find_nth_cookie cookie(n);
 
     const int err = __system_property_foreach(find_nth_fn, &cookie);
diff --git a/libc/include/sys/system_properties.h b/libc/include/sys/system_properties.h
index d3e0d8d..faed9a0 100644
--- a/libc/include/sys/system_properties.h
+++ b/libc/include/sys/system_properties.h
@@ -81,7 +81,8 @@
 ** is inefficient and order of results may change from call
 ** to call.
 */ 
-const prop_info *__system_property_find_nth(unsigned n);
+const prop_info *__system_property_find_nth(unsigned n)
+  __REMOVED_IN(26);
 
 /* Pass a prop_info for each system property to the provided
 ** callback.  Use __system_property_read() to read the value
diff --git a/libc/libc.arm.map b/libc/libc.arm.map
index f9c5ede..3ff7ead 100644
--- a/libc/libc.arm.map
+++ b/libc/libc.arm.map
@@ -186,19 +186,16 @@
     __sym_ntos;
     __sym_ston;
     __system_properties_init;
-    __system_property_add; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_area__; # var
     __system_property_area_init; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_area_serial; # introduced=23
     __system_property_find;
-    __system_property_find_nth;
     __system_property_foreach; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_get;
     __system_property_read;
     __system_property_serial; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_set; # introduced-arm=12 introduced-arm64=21 introduced-mips=12 introduced-mips64=21 introduced-x86=12 introduced-x86_64=21
     __system_property_set_filename; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
-    __system_property_update; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_wait_any; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __timer_create; # arm x86 mips
     __timer_delete; # arm x86 mips
@@ -1535,8 +1532,15 @@
     wcswcs; # arm x86 mips
 } LIBC_O;
 
+LIBC_DEPRECATED {
+  global:
+    __system_property_find_nth;
+};
+
 LIBC_PLATFORM {
   global:
+    __system_property_add;
+    __system_property_update;
     android_net_res_stats_get_info_for_net;
     android_net_res_stats_aggregate;
     android_net_res_stats_get_usable_servers;
diff --git a/libc/libc.arm64.map b/libc/libc.arm64.map
index 179d8bf..a696c41 100644
--- a/libc/libc.arm64.map
+++ b/libc/libc.arm64.map
@@ -131,19 +131,16 @@
     __sym_ntos;
     __sym_ston;
     __system_properties_init;
-    __system_property_add; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_area__; # var
     __system_property_area_init; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_area_serial; # introduced=23
     __system_property_find;
-    __system_property_find_nth;
     __system_property_foreach; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_get;
     __system_property_read;
     __system_property_serial; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_set; # introduced-arm=12 introduced-arm64=21 introduced-mips=12 introduced-mips64=21 introduced-x86=12 introduced-x86_64=21
     __system_property_set_filename; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
-    __system_property_update; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_wait_any; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __umask_chk; # introduced-arm=18 introduced-arm64=21 introduced-mips=18 introduced-mips64=21 introduced-x86=18 introduced-x86_64=21
     __vsnprintf_chk; # introduced-arm=17 introduced-arm64=21 introduced-mips=17 introduced-mips64=21 introduced-x86=17 introduced-x86_64=21
@@ -1252,8 +1249,15 @@
     gMallocLeakZygoteChild;
 } LIBC_O;
 
+LIBC_DEPRECATED {
+  global:
+    __system_property_find_nth;
+};
+
 LIBC_PLATFORM {
   global:
+    __system_property_add;
+    __system_property_update;
     android_net_res_stats_get_info_for_net;
     android_net_res_stats_aggregate;
     android_net_res_stats_get_usable_servers;
diff --git a/libc/libc.map.txt b/libc/libc.map.txt
index f122937..391c65c 100644
--- a/libc/libc.map.txt
+++ b/libc/libc.map.txt
@@ -187,19 +187,16 @@
     __sym_ntos;
     __sym_ston;
     __system_properties_init;
-    __system_property_add; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_area__; # var
     __system_property_area_init; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_area_serial; # introduced=23
     __system_property_find;
-    __system_property_find_nth;
     __system_property_foreach; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_get;
     __system_property_read;
     __system_property_serial; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_set; # introduced-arm=12 introduced-arm64=21 introduced-mips=12 introduced-mips64=21 introduced-x86=12 introduced-x86_64=21
     __system_property_set_filename; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
-    __system_property_update; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_wait_any; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __timer_create; # arm x86 mips
     __timer_delete; # arm x86 mips
@@ -1561,8 +1558,15 @@
     wcswcs; # arm x86 mips
 } LIBC_O;
 
+LIBC_DEPRECATED {
+  global:
+    __system_property_find_nth;
+};
+
 LIBC_PLATFORM {
   global:
+    __system_property_add;
+    __system_property_update;
     android_net_res_stats_get_info_for_net;
     android_net_res_stats_aggregate;
     android_net_res_stats_get_usable_servers;
diff --git a/libc/libc.mips.map b/libc/libc.mips.map
index a969703..c89b4ad 100644
--- a/libc/libc.mips.map
+++ b/libc/libc.mips.map
@@ -183,19 +183,16 @@
     __sym_ntos;
     __sym_ston;
     __system_properties_init;
-    __system_property_add; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_area__; # var
     __system_property_area_init; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_area_serial; # introduced=23
     __system_property_find;
-    __system_property_find_nth;
     __system_property_foreach; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_get;
     __system_property_read;
     __system_property_serial; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_set; # introduced-arm=12 introduced-arm64=21 introduced-mips=12 introduced-mips64=21 introduced-x86=12 introduced-x86_64=21
     __system_property_set_filename; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
-    __system_property_update; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_wait_any; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __timer_create; # arm x86 mips
     __timer_delete; # arm x86 mips
@@ -1376,8 +1373,15 @@
     wcswcs; # arm x86 mips
 } LIBC_O;
 
+LIBC_DEPRECATED {
+  global:
+    __system_property_find_nth;
+};
+
 LIBC_PLATFORM {
   global:
+    __system_property_add;
+    __system_property_update;
     android_net_res_stats_get_info_for_net;
     android_net_res_stats_aggregate;
     android_net_res_stats_get_usable_servers;
diff --git a/libc/libc.mips64.map b/libc/libc.mips64.map
index 179d8bf..a696c41 100644
--- a/libc/libc.mips64.map
+++ b/libc/libc.mips64.map
@@ -131,19 +131,16 @@
     __sym_ntos;
     __sym_ston;
     __system_properties_init;
-    __system_property_add; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_area__; # var
     __system_property_area_init; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_area_serial; # introduced=23
     __system_property_find;
-    __system_property_find_nth;
     __system_property_foreach; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_get;
     __system_property_read;
     __system_property_serial; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_set; # introduced-arm=12 introduced-arm64=21 introduced-mips=12 introduced-mips64=21 introduced-x86=12 introduced-x86_64=21
     __system_property_set_filename; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
-    __system_property_update; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_wait_any; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __umask_chk; # introduced-arm=18 introduced-arm64=21 introduced-mips=18 introduced-mips64=21 introduced-x86=18 introduced-x86_64=21
     __vsnprintf_chk; # introduced-arm=17 introduced-arm64=21 introduced-mips=17 introduced-mips64=21 introduced-x86=17 introduced-x86_64=21
@@ -1252,8 +1249,15 @@
     gMallocLeakZygoteChild;
 } LIBC_O;
 
+LIBC_DEPRECATED {
+  global:
+    __system_property_find_nth;
+};
+
 LIBC_PLATFORM {
   global:
+    __system_property_add;
+    __system_property_update;
     android_net_res_stats_get_info_for_net;
     android_net_res_stats_aggregate;
     android_net_res_stats_get_usable_servers;
diff --git a/libc/libc.x86.map b/libc/libc.x86.map
index dfa839e..51b222d 100644
--- a/libc/libc.x86.map
+++ b/libc/libc.x86.map
@@ -183,19 +183,16 @@
     __sym_ntos;
     __sym_ston;
     __system_properties_init;
-    __system_property_add; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_area__; # var
     __system_property_area_init; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_area_serial; # introduced=23
     __system_property_find;
-    __system_property_find_nth;
     __system_property_foreach; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_get;
     __system_property_read;
     __system_property_serial; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_set; # introduced-arm=12 introduced-arm64=21 introduced-mips=12 introduced-mips64=21 introduced-x86=12 introduced-x86_64=21
     __system_property_set_filename; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
-    __system_property_update; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_wait_any; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __timer_create; # arm x86 mips
     __timer_delete; # arm x86 mips
@@ -1375,8 +1372,15 @@
     wcswcs; # arm x86 mips
 } LIBC_O;
 
+LIBC_DEPRECATED {
+  global:
+    __system_property_find_nth;
+};
+
 LIBC_PLATFORM {
   global:
+    __system_property_add;
+    __system_property_update;
     android_net_res_stats_get_info_for_net;
     android_net_res_stats_aggregate;
     android_net_res_stats_get_usable_servers;
diff --git a/libc/libc.x86_64.map b/libc/libc.x86_64.map
index 179d8bf..a696c41 100644
--- a/libc/libc.x86_64.map
+++ b/libc/libc.x86_64.map
@@ -131,19 +131,16 @@
     __sym_ntos;
     __sym_ston;
     __system_properties_init;
-    __system_property_add; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_area__; # var
     __system_property_area_init; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_area_serial; # introduced=23
     __system_property_find;
-    __system_property_find_nth;
     __system_property_foreach; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_get;
     __system_property_read;
     __system_property_serial; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_set; # introduced-arm=12 introduced-arm64=21 introduced-mips=12 introduced-mips64=21 introduced-x86=12 introduced-x86_64=21
     __system_property_set_filename; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
-    __system_property_update; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __system_property_wait_any; # introduced-arm=19 introduced-arm64=21 introduced-mips=19 introduced-mips64=21 introduced-x86=19 introduced-x86_64=21
     __umask_chk; # introduced-arm=18 introduced-arm64=21 introduced-mips=18 introduced-mips64=21 introduced-x86=18 introduced-x86_64=21
     __vsnprintf_chk; # introduced-arm=17 introduced-arm64=21 introduced-mips=17 introduced-mips64=21 introduced-x86=17 introduced-x86_64=21
@@ -1252,8 +1249,15 @@
     gMallocLeakZygoteChild;
 } LIBC_O;
 
+LIBC_DEPRECATED {
+  global:
+    __system_property_find_nth;
+};
+
 LIBC_PLATFORM {
   global:
+    __system_property_add;
+    __system_property_update;
     android_net_res_stats_get_info_for_net;
     android_net_res_stats_aggregate;
     android_net_res_stats_get_usable_servers;
diff --git a/tests/gtest_main.cpp b/tests/gtest_main.cpp
index f0dac7c..b9ee585 100644
--- a/tests/gtest_main.cpp
+++ b/tests/gtest_main.cpp
@@ -170,6 +170,9 @@
   void SetResult(TestResult result) { result_ = result; }
 
   TestResult GetResult() const { return result_; }
+  TestResult GetExpectedResult() const {
+    return GetName().find("xfail_") == 0 ? TEST_FAILED : TEST_SUCCESS;
+  }
 
   void SetTestTime(int64_t elapsed_time_ns) { elapsed_time_ns_ = elapsed_time_ns; }
 
@@ -224,6 +227,15 @@
     return test_list_[test_id].GetResult();
   }
 
+  TestResult GetExpectedTestResult(size_t test_id) const {
+    VerifyTestId(test_id);
+    return test_list_[test_id].GetExpectedResult();
+  }
+
+  bool GetTestSuccess(size_t test_id) const {
+    return GetTestResult(test_id) == GetExpectedTestResult(test_id);
+  }
+
   void SetTestTime(size_t test_id, int64_t elapsed_time_ns) {
     VerifyTestId(test_id);
     test_list_[test_id].SetTestTime(elapsed_time_ns);
@@ -356,7 +368,7 @@
   printf("%s", test_output.c_str());
 
   TestResult result = testcase.GetTestResult(test_id);
-  if (result == TEST_SUCCESS) {
+  if (result == testcase.GetExpectedTestResult(test_id)) {
     ColoredPrintf(COLOR_GREEN, "[       OK ] ");
   } else {
     ColoredPrintf(COLOR_RED, "[  FAILED  ] ");
@@ -373,10 +385,19 @@
 
 static void OnTestEndPrint(const TestCase& testcase, size_t test_id) {
   TestResult result = testcase.GetTestResult(test_id);
+  TestResult expected = testcase.GetExpectedTestResult(test_id);
   if (result == TEST_SUCCESS) {
-    ColoredPrintf(COLOR_GREEN, "[    OK    ] ");
+    if (expected == TEST_SUCCESS) {
+      ColoredPrintf(COLOR_GREEN, "[    OK    ] ");
+    } else if (expected == TEST_FAILED) {
+      ColoredPrintf(COLOR_RED, "[  XPASS   ] ");
+    }
   } else if (result == TEST_FAILED) {
-    ColoredPrintf(COLOR_RED, "[  FAILED  ] ");
+    if (expected == TEST_SUCCESS) {
+      ColoredPrintf(COLOR_RED, "[  FAILED  ] ");
+    } else if (expected == TEST_FAILED) {
+      ColoredPrintf(COLOR_YELLOW, "[  XFAIL   ] ");
+    }
   } else if (result == TEST_TIMEOUT) {
     ColoredPrintf(COLOR_RED, "[ TIMEOUT  ] ");
   }
@@ -398,6 +419,7 @@
                                     int64_t elapsed_time_ns) {
 
   std::vector<std::string> fail_test_name_list;
+  std::vector<std::string> xpass_test_name_list;
   std::vector<std::pair<std::string, int64_t>> timeout_test_list;
 
   // For tests that were slow but didn't time out.
@@ -405,18 +427,28 @@
   size_t testcase_count = testcase_list.size();
   size_t test_count = 0;
   size_t success_test_count = 0;
+  size_t expected_failure_count = 0;
 
   for (const auto& testcase : testcase_list) {
     test_count += testcase.TestCount();
     for (size_t i = 0; i < testcase.TestCount(); ++i) {
       TestResult result = testcase.GetTestResult(i);
-      if (result == TEST_SUCCESS) {
-        ++success_test_count;
-      } else if (result == TEST_FAILED) {
-        fail_test_name_list.push_back(testcase.GetTestName(i));
-      } else if (result == TEST_TIMEOUT) {
-        timeout_test_list.push_back(std::make_pair(testcase.GetTestName(i),
-                                                   testcase.GetTestTime(i)));
+      TestResult expected = testcase.GetExpectedTestResult(i);
+      if (result == TEST_TIMEOUT) {
+        timeout_test_list.push_back(
+            std::make_pair(testcase.GetTestName(i), testcase.GetTestTime(i)));
+      } else if (result == expected) {
+        if (result == TEST_SUCCESS) {
+          ++success_test_count;
+        } else {
+          ++expected_failure_count;
+        }
+      } else {
+        if (result == TEST_FAILED) {
+          fail_test_name_list.push_back(testcase.GetTestName(i));
+        } else {
+          xpass_test_name_list.push_back(testcase.GetTestName(i));
+        }
       }
       if (result != TEST_TIMEOUT &&
           testcase.GetTestTime(i) / 1000000 >= GetSlowThresholdMs(testcase.GetTestName(i))) {
@@ -435,7 +467,12 @@
   }
   printf("\n");
   ColoredPrintf(COLOR_GREEN,  "[   PASS   ] ");
-  printf("%zu %s.\n", success_test_count, (success_test_count == 1) ? "test" : "tests");
+  printf("%zu %s.", success_test_count, (success_test_count == 1) ? "test" : "tests");
+  if (expected_failure_count > 0) {
+    printf(" (%zu expected failure%s)", expected_failure_count,
+           (expected_failure_count == 1) ? "" : "s");
+  }
+  printf("\n");
 
   // Print tests that timed out.
   size_t timeout_test_count = timeout_test_list.size();
@@ -472,7 +509,18 @@
     }
   }
 
-  if (timeout_test_count > 0 || slow_test_count > 0 || fail_test_count > 0) {
+  // Print tests that should have failed.
+  size_t xpass_test_count = xpass_test_name_list.size();
+  if (xpass_test_count > 0) {
+    ColoredPrintf(COLOR_RED,  "[  XPASS   ] ");
+    printf("%zu %s, listed below:\n", xpass_test_count, (xpass_test_count == 1) ? "test" : "tests");
+    for (const auto& name : xpass_test_name_list) {
+      ColoredPrintf(COLOR_RED, "[  XPASS   ] ");
+      printf("%s\n", name.c_str());
+    }
+  }
+
+  if (timeout_test_count > 0 || slow_test_count > 0 || fail_test_count > 0 || xpass_test_count > 0) {
     printf("\n");
   }
 
@@ -485,6 +533,10 @@
   if (fail_test_count > 0) {
     printf("%2zu FAILED %s\n", fail_test_count, (fail_test_count == 1) ? "TEST" : "TESTS");
   }
+  if (xpass_test_count > 0) {
+    printf("%2zu SHOULD HAVE FAILED %s\n", xpass_test_count, (xpass_test_count == 1) ? "TEST" : "TESTS");
+  }
+
   fflush(stdout);
 }
 
@@ -540,7 +592,7 @@
     auto& testcase = testcase_list[i];
     total_test_count += testcase.TestCount();
     for (size_t j = 0; j < testcase.TestCount(); ++j) {
-      if (testcase.GetTestResult(j) != TEST_SUCCESS) {
+      if (!testcase.GetTestSuccess(j)) {
         ++failed_count_list[i];
       }
       elapsed_time_list[i] += testcase.GetTestTime(j);
@@ -568,7 +620,7 @@
       fprintf(fp, "    <testcase name=\"%s\" status=\"run\" time=\"%.3lf\" classname=\"%s\"",
               testcase.GetTest(j).GetName().c_str(), testcase.GetTestTime(j) / 1e9,
               testcase.GetName().c_str());
-      if (testcase.GetTestResult(j) == TEST_SUCCESS) {
+      if (!testcase.GetTestSuccess(j)) {
         fputs(" />\n", fp);
       } else {
         fputs(">\n", fp);
@@ -927,7 +979,7 @@
           if (++finished_test_count_list[testcase_id] == testcase.TestCount()) {
             ++finished_testcase_count;
           }
-          if (testcase.GetTestResult(test_id) != TEST_SUCCESS) {
+          if (!testcase.GetTestSuccess(test_id)) {
             all_tests_passed = false;
           }
 
diff --git a/tests/stdio_test.cpp b/tests/stdio_test.cpp
index 63da9e0..da70d21 100644
--- a/tests/stdio_test.cpp
+++ b/tests/stdio_test.cpp
@@ -31,6 +31,7 @@
 
 #include "BionicDeathTest.h"
 #include "TemporaryFile.h"
+#include "utils.h"
 
 #if defined(NOFORTIFY)
 #define STDIO_TEST stdio_nofortify
@@ -47,6 +48,7 @@
   rewind(fp);
 
   char line[1024];
+  memset(line, 0xff, sizeof(line));
   ASSERT_EQ(line, fgets(line, sizeof(line), fp));
   ASSERT_STREQ(expected, line);
 
@@ -938,7 +940,7 @@
   fclose(fp);
 }
 
-TEST(STDIO_TEST, fmemopen_NULL) {
+TEST(STDIO_TEST, KNOWN_FAILURE_ON_BIONIC(fmemopen_NULL)) {
   FILE* fp = fmemopen(nullptr, 128, "r+");
   ASSERT_NE(EOF, fputs("xyz\n", fp));
 
diff --git a/tests/system_properties_test.cpp b/tests/system_properties_test.cpp
index 09eac3f..70482f0 100644
--- a/tests/system_properties_test.cpp
+++ b/tests/system_properties_test.cpp
@@ -244,16 +244,10 @@
     ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
     ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
 
-    ASSERT_NE((const prop_info *)NULL, __system_property_find_nth(0));
-    ASSERT_NE((const prop_info *)NULL, __system_property_find_nth(1));
-    ASSERT_NE((const prop_info *)NULL, __system_property_find_nth(2));
-
-    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(3));
-    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(4));
-    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(5));
-    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(100));
-    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(200));
-    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(247));
+    // This method is no longer supported and should result in abort
+    ASSERT_EXIT(__system_property_find_nth(0), testing::KilledBySignal(SIGABRT),
+                "__system_property_find_nth is not supported since Android O,"
+                " please use __system_property_foreach instead.");
 #else // __BIONIC__
     GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif // __BIONIC__
diff --git a/tests/utils.h b/tests/utils.h
index 4c3aef4..79eed10 100644
--- a/tests/utils.h
+++ b/tests/utils.h
@@ -32,6 +32,12 @@
 
 #include "private/ScopeGuard.h"
 
+#if defined(__BIONIC__)
+#define KNOWN_FAILURE_ON_BIONIC(x) xfail_ ## x
+#else
+#define KNOWN_FAILURE_ON_BIONIC(x) x
+#endif
+
 #if defined(__linux__)
 
 struct map_record {