diff --git a/core/libs/prx/libSceAudioOut/CMakeLists.txt b/core/libs/prx/libSceAudioOut/CMakeLists.txt
index a8e939bab4..bc85082ca5 100644
--- a/core/libs/prx/libSceAudioOut/CMakeLists.txt
+++ b/core/libs/prx/libSceAudioOut/CMakeLists.txt
@@ -317,6 +317,16 @@ if(BUILD_TESTING)
             "PATH=path_list_prepend:$<TARGET_FILE_DIR:libSceAudioOut>")
     endif()
 
+    add_test_executable(guest_audio_out_tests ${LIBS_INCLUDE_DIR}/tests/GuestAudioOut.cpp)
+    target_include_directories(guest_audio_out_tests PRIVATE ${LIBS_INCLUDE_DIR})
+    target_link_libraries(guest_audio_out_tests PRIVATE libSceAudioOut libc)
+    configure_windows_unwind(guest_audio_out_tests)
+    add_test(NAME guest_audio_out COMMAND guest_audio_out_tests)
+    if(WIN32)
+        set_tests_properties(guest_audio_out PROPERTIES ENVIRONMENT_MODIFICATION
+            "PATH=path_list_prepend:$<TARGET_FILE_DIR:libSceAudioOut>")
+    endif()
+
     add_test_executable(audio_out2_context_handles_tests tests/AudioOut2ContextHandles.cpp)
     target_include_directories(audio_out2_context_handles_tests PRIVATE ${LIBS_INCLUDE_DIR})
     target_link_libraries(audio_out2_context_handles_tests PRIVATE libSceAudioOut libc)
diff --git a/core/libs/tests/GuestAudioOut.cpp b/core/libs/tests/GuestAudioOut.cpp
new file mode 100644
index 0000000000..b80d9741f9
--- /dev/null
+++ b/core/libs/tests/GuestAudioOut.cpp
@@ -0,0 +1,22 @@
+#include "prx/libSceAudioOut/include/AudioOut.hpp"
+#include "SceTypes.hpp"
+#include "prx/libc/include/Shutdown.hpp"
+#include <cstdlib>
+
+static void Require(bool value) {
+    if (!value) {
+        std::abort();
+    }
+}
+
+int main() {
+    constexpr int invalidPointer = static_cast<int>(0x80260004);
+    constexpr int invalidHandle = static_cast<int>(0x80260001);
+
+    Require(sceAudioOutInit() == 0);
+    Require(sceAudioOutGetPortState(invalidHandle, nullptr) == invalidPointer);
+    Require(sceAudioOutGetPortState(0, nullptr) == invalidPointer);
+
+    LibcRunShutdown_nid_postfix();
+    return 0;
+}