diff --git a/tests/libs/Android.bp b/tests/libs/Android.bp
index 9be85c8..fdf2cca 100644
--- a/tests/libs/Android.bp
+++ b/tests/libs/Android.bp
@@ -469,6 +469,56 @@
 }
 
 // -----------------------------------------------------------------------------
+// ns_hidden_child linker namespace test
+// -----------------------------------------------------------------------------
+
+cc_test {
+    name: "ns_hidden_child_helper",
+    host_supported: false,
+    defaults: ["bionic_testlib_defaults"],
+    srcs: ["ns_hidden_child_helper.cpp"],
+    shared_libs: [
+        "libns_hidden_child_internal",
+        "libns_hidden_child_global",
+        "libdl_android",
+    ],
+    ldflags: ["-Wl,--rpath,${ORIGIN}/.."],
+}
+
+cc_test_library {
+    name: "libns_hidden_child_global",
+    defaults: ["bionic_testlib_defaults"],
+    host_supported: false,
+    srcs: ["ns_hidden_child_global.cpp"],
+    shared_libs: ["libns_hidden_child_internal"],
+    ldflags: ["-Wl,-z,global"],
+}
+
+cc_test_library {
+    name: "libns_hidden_child_internal",
+    defaults: ["bionic_testlib_defaults"],
+    host_supported: false,
+    srcs: ["ns_hidden_child_internal.cpp"],
+}
+
+cc_test_library {
+    name: "libns_hidden_child_public",
+    defaults: ["bionic_testlib_defaults"],
+    host_supported: false,
+    srcs: ["ns_hidden_child_public.cpp"],
+    shared_libs: ["libns_hidden_child_internal"],
+}
+
+cc_test_library {
+    name: "libns_hidden_child_app",
+    defaults: ["bionic_testlib_defaults"],
+    host_supported: false,
+    srcs: ["ns_hidden_child_app.cpp"],
+    shared_libs: ["libns_hidden_child_public"],
+    relative_install_path: "bionic-loader-test-libs/ns_hidden_child_app",
+}
+
+// -----------------------------------------------------------------------------
 // Build DT_RUNPATH test helper libraries
 //
 // Dependencies
diff --git a/tests/libs/ns_hidden_child_app.cpp b/tests/libs/ns_hidden_child_app.cpp
new file mode 100644
index 0000000..01a95cc
--- /dev/null
+++ b/tests/libs/ns_hidden_child_app.cpp
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+
+__attribute__((weak)) extern "C" void public_function();
+__attribute__((weak)) extern "C" void internal_function();
+
+extern "C" void app_function() {
+  printf("public_function is %s\n", public_function == nullptr ? "null" : "non-null");
+  printf("internal_function is %s\n", internal_function == nullptr ? "null" : "non-null");
+}
diff --git a/tests/libs/ns_hidden_child_global.cpp b/tests/libs/ns_hidden_child_global.cpp
new file mode 100644
index 0000000..8bdcba9
--- /dev/null
+++ b/tests/libs/ns_hidden_child_global.cpp
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+extern "C" void internal_function();
+
+extern "C" void global_function() {
+  internal_function();
+}
diff --git a/tests/libs/ns_hidden_child_helper.cpp b/tests/libs/ns_hidden_child_helper.cpp
new file mode 100644
index 0000000..c2140f1
--- /dev/null
+++ b/tests/libs/ns_hidden_child_helper.cpp
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <android/dlext.h>
+#include <dlfcn.h>
+#include <stdlib.h>
+
+#include <string>
+
+#include "../core_shared_libs.h"
+#include "../dlext_private.h"
+
+extern "C" void global_function();
+extern "C" void internal_function();
+
+int main(int argc, char* argv[]) {
+  if (argc != 2) {
+    fprintf(stderr, "usage: %s NS_PATH\n", argv[0]);
+    fprintf(stderr, "NS_PATH   path to the ns_hidden_child_app directory\n");
+    exit(1);
+  }
+
+  // Ensure that -Wl,--needed doesn't break the test by removing DT_NEEDED entries.
+  global_function();
+  internal_function();
+
+  const char* app_lib_dir = argv[1];
+  android_namespace_t* app_ns =
+      android_create_namespace("app", nullptr, app_lib_dir, ANDROID_NAMESPACE_TYPE_ISOLATED,
+                               nullptr, nullptr);
+  if (app_ns == nullptr) {
+    fprintf(stderr, "android_create_namespace failed: %s\n", dlerror());
+    exit(1);
+  }
+
+  std::string public_libs = std::string(kCoreSharedLibs) + ":libns_hidden_child_public.so";
+  if (!android_link_namespaces(app_ns, nullptr, public_libs.c_str())) {
+    fprintf(stderr, "android_link_namespaces failed: %s\n", dlerror());
+    exit(1);
+  }
+
+  android_dlextinfo ext = {
+    .flags = ANDROID_DLEXT_USE_NAMESPACE,
+    .library_namespace = app_ns,
+  };
+  void* app_lib = android_dlopen_ext("libns_hidden_child_app.so", RTLD_NOW | RTLD_LOCAL, &ext);
+  if (app_lib == nullptr) {
+    fprintf(stderr, "android_dlopen_ext failed: %s\n", dlerror());
+    exit(1);
+  }
+
+  auto app_function = reinterpret_cast<void(*)()>(dlsym(app_lib, "app_function"));
+  if (app_function == nullptr) {
+    fprintf(stderr, "dlsym failed to find app_function: %s\n", dlerror());
+    exit(1);
+  }
+
+  app_function();
+  return 0;
+}
diff --git a/tests/libs/ns_hidden_child_internal.cpp b/tests/libs/ns_hidden_child_internal.cpp
new file mode 100644
index 0000000..23543cb
--- /dev/null
+++ b/tests/libs/ns_hidden_child_internal.cpp
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+extern "C" void internal_function() {}
diff --git a/tests/libs/ns_hidden_child_public.cpp b/tests/libs/ns_hidden_child_public.cpp
new file mode 100644
index 0000000..1f20bd2
--- /dev/null
+++ b/tests/libs/ns_hidden_child_public.cpp
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+extern "C" void internal_function();
+
+extern "C" void public_function() {
+  internal_function();
+}