diff --git a/tests/sys_mman_test.cpp b/tests/sys_mman_test.cpp
index 75ccfa3..b0e40fd 100644
--- a/tests/sys_mman_test.cpp
+++ b/tests/sys_mman_test.cpp
@@ -172,3 +172,46 @@
   ASSERT_STREQ(NEWPAGE2_MSG, buf);
   ASSERT_STREQ(END_MSG, buf+pagesize-sizeof(END_MSG));
 }
+
+TEST(sys_mman, posix_madvise) {
+  TemporaryFile tempfile;
+  size_t pagesize = sysconf(_SC_PAGESIZE);
+  char buf[pagesize];
+
+  // Prepare environment.
+  ASSERT_EQ(static_cast<ssize_t>(pagesize), write(tempfile.fd, buf, pagesize));
+  void* map = mmap(NULL, pagesize, PROT_READ | PROT_WRITE, MAP_SHARED, tempfile.fd, 0);
+  ASSERT_NE(MAP_FAILED, map);
+
+  // Verify different options of posix_madvise.
+  ASSERT_EQ(0, posix_madvise(map, pagesize, POSIX_MADV_NORMAL));
+  ASSERT_EQ(0, posix_madvise(map, pagesize, POSIX_MADV_SEQUENTIAL));
+  ASSERT_EQ(0, posix_madvise(map, pagesize, POSIX_MADV_RANDOM));
+  ASSERT_EQ(0, posix_madvise(map, pagesize, POSIX_MADV_WILLNEED));
+
+  ASSERT_EQ(0, munmap(map, pagesize));
+}
+
+// Verify that memory can still access after posix_madvise(POSIX_MADV_DONTNEED).
+// We should test on MAP_ANONYMOUS memory to verify whether the memory is discarded,
+// because the content of non MAP_ANONYMOUS memory can be reread from file.
+TEST(sys_mman, posix_madvise_POSIX_MADV_DONTNEED) {
+  size_t pagesize = sysconf(_SC_PAGESIZE);
+
+  void* map = mmap(NULL, pagesize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+  ASSERT_NE(MAP_FAILED, map);
+
+  int* int_ptr = reinterpret_cast<int*>(map);
+  for (int i = 0; i < static_cast<int>(pagesize / sizeof(int)); ++i) {
+    *int_ptr++ = i;
+  }
+
+  ASSERT_EQ(0, posix_madvise(map, pagesize, POSIX_MADV_DONTNEED));
+
+  int_ptr = reinterpret_cast<int*>(map);
+  for (int i = 0; i < static_cast<int>(pagesize / sizeof(int)); ++i) {
+    ASSERT_EQ(i, *int_ptr++);
+  }
+
+  ASSERT_EQ(0, munmap(map, pagesize));
+}
diff --git a/tests/unistd_test.cpp b/tests/unistd_test.cpp
index 34b7bf3..b37687f 100644
--- a/tests/unistd_test.cpp
+++ b/tests/unistd_test.cpp
@@ -523,6 +523,7 @@
   // Verify according to POSIX.1-2008.
   EXPECT_EQ(200809L, _POSIX_VERSION);
 
+  EXPECT_EQ(_POSIX_VERSION, _POSIX_ADVISORY_INFO);
   EXPECT_GT(_POSIX_AIO_LISTIO_MAX, 0);
   EXPECT_GT(_POSIX_AIO_MAX, 0);
   EXPECT_GT(_POSIX_ARG_MAX, 0);
@@ -611,8 +612,7 @@
 
 #if defined(__BIONIC__)
   // These tests only pass on bionic, as bionic and glibc has different support on these macros.
-  // Macros like _POSIX_ADVISORY_INFO are not supported on bionic yet.
-  EXPECT_EQ(-1, _POSIX_ADVISORY_INFO);
+  // Macros like _POSIX_ASYNCHRONOUS_IO are not supported on bionic yet.
   EXPECT_EQ(-1, _POSIX_ASYNCHRONOUS_IO);
   EXPECT_EQ(-1, _POSIX_BARRIERS);
   EXPECT_EQ(-1, _POSIX_MESSAGE_PASSING);
@@ -658,6 +658,7 @@
 }
 
 TEST(unistd, sysconf) {
+  VERIFY_SYSCONF_POSIX_VERSION(_SC_ADVISORY_INFO);
   VERIFY_SYSCONF_POSITIVE(_SC_ARG_MAX);
   VERIFY_SYSCONF_POSITIVE(_SC_BC_BASE_MAX);
   VERIFY_SYSCONF_POSITIVE(_SC_BC_DIM_MAX);
@@ -773,7 +774,6 @@
 #if defined(__BIONIC__)
   // Tests can only run on bionic, as bionic and glibc have different support for these options.
   // Below options are not supported on bionic yet.
-  VERIFY_SYSCONF_NOT_SUPPORT(_SC_ADVISORY_INFO);
   VERIFY_SYSCONF_NOT_SUPPORT(_SC_ASYNCHRONOUS_IO);
   VERIFY_SYSCONF_NOT_SUPPORT(_SC_BARRIERS);
   VERIFY_SYSCONF_NOT_SUPPORT(_SC_MESSAGE_PASSING);