diff --git a/core/libs/prx/libSceVideoOut/CMakeLists.txt b/core/libs/prx/libSceVideoOut/CMakeLists.txt
index f88cca100c..43857acce0 100644
--- a/core/libs/prx/libSceVideoOut/CMakeLists.txt
+++ b/core/libs/prx/libSceVideoOut/CMakeLists.txt
@@ -190,6 +190,17 @@ if(BUILD_TESTING)
     endif()
 endif()
 
+if(BUILD_TESTING)
+    add_test_executable(pad_host_volume_tests tests/HostVolumeInput.cpp ${CMAKE_CURRENT_SOURCE_DIR}/../libSceAudioOut/src/HostVolumeState.cpp)
+    target_include_directories(pad_host_volume_tests PRIVATE ${LIBS_INCLUDE_DIR} ${CMAKE_SOURCE_DIR}/3rdparty/SDL2/include)
+    target_link_libraries(pad_host_volume_tests PRIVATE SDL2-static)
+    if(MINGW)
+        target_compile_options(pad_host_volume_tests PRIVATE -fasynchronous-unwind-tables)
+        target_link_options(pad_host_volume_tests PRIVATE -static -static-libgcc -static-libstdc++)
+    endif()
+    add_test(NAME pad_host_volume COMMAND pad_host_volume_tests)
+endif()
+
 if(BUILD_TESTING)
     add_test_executable(pad_keyboard_mouse_tests tests/KeyboardMouse.cpp src/KeyboardMouse.cpp)
     target_include_directories(pad_keyboard_mouse_tests PRIVATE ${LIBS_INCLUDE_DIR} ${CMAKE_SOURCE_DIR}/3rdparty/SDL2/include)
diff --git a/core/libs/prx/libSceVideoOut/tests/HostVolumeInput.cpp b/core/libs/prx/libSceVideoOut/tests/HostVolumeInput.cpp
new file mode 100644
index 0000000000..e00be9a193
--- /dev/null
+++ b/core/libs/prx/libSceVideoOut/tests/HostVolumeInput.cpp
@@ -0,0 +1,83 @@
+#include "prx/libSceVideoOut/include/HostVolumeInput.hpp"
+
+#include <cstdio>
+#include <exception>
+#include <stdexcept>
+
+namespace {
+
+void require(bool condition, const char* message) {
+    if (!condition) throw std::runtime_error(message);
+}
+
+void noRequestChangesNothing() {
+    HostVolumeConfigure_nid_no_patch(nullptr, nullptr);
+    HostVolume after;
+    require(!ApplyHostVolumeRequests(Pad::InputRequests{}, &after), "an empty request set asks for nothing");
+    require(HostVolumeGain_nid_no_patch() == HostVolume::UnityGain, "an empty request set leaves unity");
+    require(after.Volume() == 100 && !after.Muted(), "the out parameter is untouched without a request");
+}
+
+void volumeRequestsMoveTheVolume() {
+    HostVolumeConfigure_nid_no_patch(nullptr, nullptr);
+    HostVolume after;
+    Pad::InputRequests down;
+    down.volumeDown = true;
+    require(ApplyHostVolumeRequests(down, &after), "a volume down request is handled");
+    require(after.Volume() == 95 && HostVolumeGain_nid_no_patch() == after.Gain(), "volume down lowers the shared volume by one step");
+    Pad::InputRequests up;
+    up.volumeUp = true;
+    require(ApplyHostVolumeRequests(up, &after), "a volume up request is handled");
+    require(after.Volume() == 100 && HostVolumeGain_nid_no_patch() == HostVolume::UnityGain, "volume up returns to exactly unity");
+    require(ApplyHostVolumeRequests(up, &after), "a volume up request at the top is still handled");
+    require(after.Volume() == 100, "volume up at the top stays at 100");
+}
+
+void muteRequestToggles() {
+    HostVolumeConfigure_nid_no_patch(nullptr, nullptr);
+    HostVolume after;
+    Pad::InputRequests mute;
+    mute.toggleMute = true;
+    require(ApplyHostVolumeRequests(mute, &after) && after.Muted() && HostVolumeGain_nid_no_patch() == 0, "the first mute request silences the output");
+    require(ApplyHostVolumeRequests(mute, &after) && !after.Muted() && HostVolumeGain_nid_no_patch() == HostVolume::UnityGain, "the second mute request restores the output");
+}
+
+void requestsRunInOrder() {
+    HostVolumeConfigure_nid_no_patch(nullptr, nullptr);
+    HostVolume after;
+    Pad::InputRequests all;
+    all.volumeUp = true;
+    all.volumeDown = true;
+    all.toggleMute = true;
+    require(ApplyHostVolumeRequests(all, &after), "a combined request is handled");
+    require(after.Volume() == 95 && after.Muted(), "up, then down, then mute leaves 95 muted");
+}
+
+void otherRequestsAreIgnored() {
+    HostVolumeConfigure_nid_no_patch(nullptr, nullptr);
+    HostVolume after;
+    Pad::InputRequests other;
+    other.toggleFullscreen = true;
+    other.togglePerformanceOverlay = true;
+    other.screenshot = true;
+    other.toggleMouse = true;
+    other.releaseMouse = true;
+    require(!ApplyHostVolumeRequests(other, &after), "the other host requests are not volume requests");
+    require(HostVolumeGain_nid_no_patch() == HostVolume::UnityGain, "the other host requests leave the volume alone");
+}
+
+}
+
+int main() try {
+    noRequestChangesNothing();
+    volumeRequestsMoveTheVolume();
+    muteRequestToggles();
+    requestsRunInOrder();
+    otherRequestsAreIgnored();
+    HostVolumeConfigure_nid_no_patch(nullptr, nullptr);
+    std::puts("host volume input tests passed");
+    return 0;
+} catch (const std::exception& error) {
+    std::fprintf(stderr, "%s\n", error.what());
+    return 1;
+}