diff --git a/tests/dlfcn_test.cpp b/tests/dlfcn_test.cpp
index 9c9fbdd..a55b364 100644
--- a/tests/dlfcn_test.cpp
+++ b/tests/dlfcn_test.cpp
@@ -202,6 +202,42 @@
   dlclose(handle);
 }
 
+TEST(dlfcn, dlopen_check_rtld_local) {
+  void* sym = dlsym(RTLD_DEFAULT, "dlopen_testlib_simple_func");
+  ASSERT_TRUE(sym == nullptr);
+
+  // implicit RTLD_LOCAL
+  void* handle = dlopen("libtest_simple.so", RTLD_NOW);
+  sym = dlsym(RTLD_DEFAULT, "dlopen_testlib_simple_func");
+  ASSERT_TRUE(sym == nullptr);
+  ASSERT_SUBSTR("undefined symbol: dlopen_testlib_simple_func", dlerror());
+  sym = dlsym(handle, "dlopen_testlib_simple_func");
+  ASSERT_TRUE(sym != nullptr);
+  ASSERT_TRUE(reinterpret_cast<bool (*)(void)>(sym)());
+  dlclose(handle);
+
+  // explicit RTLD_LOCAL
+  handle = dlopen("libtest_simple.so", RTLD_NOW | RTLD_LOCAL);
+  sym = dlsym(RTLD_DEFAULT, "dlopen_testlib_simple_func");
+  ASSERT_TRUE(sym == nullptr);
+  ASSERT_SUBSTR("undefined symbol: dlopen_testlib_simple_func", dlerror());
+  sym = dlsym(handle, "dlopen_testlib_simple_func");
+  ASSERT_TRUE(sym != nullptr);
+  ASSERT_TRUE(reinterpret_cast<bool (*)(void)>(sym)());
+  dlclose(handle);
+}
+
+TEST(dlfcn, dlopen_check_rtld_global) {
+  void* sym = dlsym(RTLD_DEFAULT, "dlopen_testlib_simple_func");
+  ASSERT_TRUE(sym == nullptr);
+
+  void* handle = dlopen("libtest_simple.so", RTLD_NOW | RTLD_GLOBAL);
+  sym = dlsym(RTLD_DEFAULT, "dlopen_testlib_simple_func");
+  ASSERT_TRUE(sym != nullptr) << dlerror();
+  ASSERT_TRUE(reinterpret_cast<bool (*)(void)>(sym)());
+  dlclose(handle);
+}
+
 // libtest_with_dependency_loop.so -> libtest_with_dependency_loop_a.so ->
 // libtest_with_dependency_loop_b.so -> libtest_with_dependency_loop_c.so ->
 // libtest_with_dependency_loop_a.so
diff --git a/tests/libs/dlopen_testlib_simple.cpp b/tests/libs/dlopen_testlib_simple.cpp
index afe54b4..06253e1 100644
--- a/tests/libs/dlopen_testlib_simple.cpp
+++ b/tests/libs/dlopen_testlib_simple.cpp
@@ -18,6 +18,6 @@
 
 uint32_t dlopen_testlib_taxicab_number = 1729;
 
-bool dlopen_testlib_simple_func() {
+extern "C" bool dlopen_testlib_simple_func() {
   return true;
 }