diff --git a/dlls/dmsynth/tests/dmsynth.c b/dlls/dmsynth/tests/dmsynth.c
index b3419359c24..161018e29a0 100644
--- a/dlls/dmsynth/tests/dmsynth.c
+++ b/dlls/dmsynth/tests/dmsynth.c
@@ -33,6 +33,8 @@ static void test_dmsynth(void)
 {
     IDirectMusicSynth *dmsynth = NULL;
     IDirectMusicSynthSink *dmsynth_sink = NULL;
+    IReferenceClock* clock = NULL;
+    IReferenceClock* clock_sink = NULL;
     HRESULT hr;
 
     hr = CoCreateInstance(&CLSID_DirectMusicSynth, NULL, CLSCTX_INPROC_SERVER, &IID_IDirectMusicSynth, (LPVOID*)&dmsynth);
@@ -45,6 +47,25 @@ static void test_dmsynth(void)
     hr = CoCreateInstance(&CLSID_DirectMusicSynthSink, NULL, CLSCTX_INPROC_SERVER, &IID_IDirectMusicSynthSink, (LPVOID*)&dmsynth_sink);
     ok(hr == S_OK, "CoCreateInstance returned: %x\n", hr);
 
+    /* Synth has no default clock */
+    hr = IDirectMusicSynth_GetLatencyClock(dmsynth, &clock);
+    todo_wine ok(hr == DMUS_E_NOSYNTHSINK, "IDirectMusicSynth_GetLatencyClock returned: %x\n", hr);
+
+    /* SynthSink has a default clock */
+    hr = IDirectMusicSynthSink_GetLatencyClock(dmsynth_sink, &clock_sink);
+    ok(hr == S_OK, "IDirectMusicSynth_GetLatencyClock returned: %x\n", hr);
+    todo_wine ok(clock_sink != NULL, "No clock returned\n");
+
+    /* This will set clock to Synth */
+    hr = IDirectMusicSynth_SetSynthSink(dmsynth, dmsynth_sink);
+    ok(hr == S_OK, "IDirectMusicSynth_SetSynthSink returned: %x\n", hr);
+
+    /* Check clocks are the same */
+    hr = IDirectMusicSynth_GetLatencyClock(dmsynth, &clock);
+    ok(hr == S_OK, "IDirectMusicSynth_GetLatencyClock returned: %x\n", hr);
+    todo_wine ok(clock != NULL, "No clock returned\n");
+    ok(clock == clock_sink, "Synth and SynthSink clocks are not the same\n");
+
     if (dmsynth_sink)
         IDirectMusicSynthSink_Release(dmsynth_sink);
     IDirectMusicSynth_Release(dmsynth);