diff --git a/dlls/dsound/tests/capture.c b/dlls/dsound/tests/capture.c
index 5185e4eb9f..8ed8aa2faf 100644
--- a/dlls/dsound/tests/capture.c
+++ b/dlls/dsound/tests/capture.c
@@ -192,9 +192,20 @@ static void IDirectSoundCapture_tests(void)
 {
     HRESULT rc;
     LPDIRECTSOUNDCAPTURE dsco=NULL;
+    LPCLASSFACTORY cf=NULL;
 
     trace("Testing IDirectSoundCapture\n");
 
+    rc=CoGetClassObject(&CLSID_DirectSoundCapture, CLSCTX_INPROC_SERVER, NULL,
+                        &IID_IClassFactory, (void**)&cf);
+    ok(rc==S_OK,"CoGetClassObject(CLSID_DirectSoundCapture, IID_IClassFactory) "
+       "failed: %s\n", DXGetErrorString8(rc));
+
+    rc=CoGetClassObject(&CLSID_DirectSoundCapture, CLSCTX_INPROC_SERVER, NULL,
+                        &IID_IUnknown, (void**)&cf);
+    ok(rc==S_OK,"CoGetClassObject(CLSID_DirectSoundCapture, IID_IUnknown) "
+       "failed: %s\n", DXGetErrorString8(rc));
+
     /* try the COM class factory method of creation with no device specified */
     rc=CoCreateInstance(&CLSID_DirectSoundCapture, NULL, CLSCTX_INPROC_SERVER,
                         &IID_IDirectSoundCapture, (void**)&dsco);
diff --git a/dlls/dsound/tests/dsound.c b/dlls/dsound/tests/dsound.c
index 5d4845ce54..6163484f82 100644
--- a/dlls/dsound/tests/dsound.c
+++ b/dlls/dsound/tests/dsound.c
@@ -172,9 +172,20 @@ static void IDirectSound_tests(void)
 {
     HRESULT rc;
     LPDIRECTSOUND dso=NULL;
+    LPCLASSFACTORY cf=NULL;
 
     trace("Testing IDirectSound\n");
 
+    rc=CoGetClassObject(&CLSID_DirectSound, CLSCTX_INPROC_SERVER, NULL,
+                        &IID_IClassFactory, (void**)&cf);
+    ok(rc==S_OK,"CoGetClassObject(CLSID_DirectSound, IID_IClassFactory) "
+       "failed: %s\n", DXGetErrorString8(rc));
+
+    rc=CoGetClassObject(&CLSID_DirectSound, CLSCTX_INPROC_SERVER, NULL,
+                        &IID_IUnknown, (void**)&cf);
+    ok(rc==S_OK,"CoGetClassObject(CLSID_DirectSound, IID_IUnknown) "
+       "failed: %s\n", DXGetErrorString8(rc));
+
     /* try the COM class factory method of creation with no device specified */
     rc=CoCreateInstance(&CLSID_DirectSound, NULL, CLSCTX_INPROC_SERVER,
                         &IID_IDirectSound, (void**)&dso);
diff --git a/dlls/dsound/tests/dsound8.c b/dlls/dsound/tests/dsound8.c
index e207a9e2a5..af90ac672a 100644
--- a/dlls/dsound/tests/dsound8.c
+++ b/dlls/dsound/tests/dsound8.c
@@ -191,9 +191,20 @@ static void IDirectSound8_tests(void)
 {
     HRESULT rc;
     LPDIRECTSOUND8 dso=NULL;
+    LPCLASSFACTORY cf=NULL;
 
     trace("Testing IDirectSound8\n");
 
+    rc=CoGetClassObject(&CLSID_DirectSound8, CLSCTX_INPROC_SERVER, NULL,
+                        &IID_IClassFactory, (void**)&cf);
+    ok(rc==S_OK,"CoGetClassObject(CLSID_DirectSound8, IID_IClassFactory) "
+       "failed: %s\n", DXGetErrorString8(rc));
+
+    rc=CoGetClassObject(&CLSID_DirectSound8, CLSCTX_INPROC_SERVER, NULL,
+                        &IID_IUnknown, (void**)&cf);
+    ok(rc==S_OK,"CoGetClassObject(CLSID_DirectSound8, IID_IUnknown) "
+       "failed: %s\n", DXGetErrorString8(rc));
+
     /* try the COM class factory method of creation with no device specified */
     rc=CoCreateInstance(&CLSID_DirectSound8, NULL, CLSCTX_INPROC_SERVER,
                         &IID_IDirectSound8, (void**)&dso);
diff --git a/dlls/dsound/tests/duplex.c b/dlls/dsound/tests/duplex.c
index 2b23833592..e4095c1275 100644
--- a/dlls/dsound/tests/duplex.c
+++ b/dlls/dsound/tests/duplex.c
@@ -66,7 +66,7 @@ static void IDirectSoundFullDuplex_test(LPDIRECTSOUNDFULLDUPLEX dsfdo,
         ok(ref==0, "IDirectSound_Release() has %d references, "
            "should have 0\n", ref);
     }
-                                                                                
+
     rc=IDirectSoundFullDuplex_QueryInterface(dsfdo,&IID_IDirectSound8,(LPVOID*)&ds8);
     ok(rc==(initialized?DS_OK:E_NOINTERFACE),"IDirectSoundFullDuplex_QueryInterface(IID_IDirectSound8) "
        "failed: %s\n",DXGetErrorString8(rc));
@@ -136,7 +136,7 @@ static void IDirectSoundFullDuplex_tests(void)
     if (dsfdo)
         IDirectSoundFullDuplex_test(dsfdo, FALSE, NULL, NULL);
 
-    /* try the COM class factory method of creation with default devices 
+    /* try the COM class factory method of creation with default devices
      * specified */
     rc=CoCreateInstance(&CLSID_DirectSoundFullDuplex, NULL,
                         CLSCTX_INPROC_SERVER, &IID_IDirectSoundFullDuplex,
diff --git a/dlls/dsound/tests/propset.c b/dlls/dsound/tests/propset.c
index 766b338666..2c11afa23b 100644
--- a/dlls/dsound/tests/propset.c
+++ b/dlls/dsound/tests/propset.c
@@ -202,6 +202,15 @@ static void propset_private_tests(void)
        "IID_IClassFactory) should have returned DSERR_INVALIDPARAM, "
        "returned: %s\n",DXGetErrorString8(rc));
 
+    rc = (fProc)(&CLSID_DirectSound, &IID_IDirectSound, (void **)(&pcf));
+    ok(rc==E_NOINTERFACE,"DllGetClassObject(CLSID_DirectSound, "
+       "IID_IDirectSound) should have returned E_NOINTERFACE, "
+       "returned: %s\n",DXGetErrorString8(rc));
+
+    rc = (fProc)(&CLSID_DirectSound, &IID_IUnknown, (void **)(&pcf));
+    ok(rc==DS_OK,"DllGetClassObject(CLSID_DirectSound, "
+       "IID_IUnknown) failed: %s\n",DXGetErrorString8(rc));
+
     rc = (fProc)(&CLSID_DirectSound, &IID_IClassFactory, (void **)(&pcf));
     ok(pcf!=0, "DllGetClassObject(CLSID_DirectSound, IID_IClassFactory) "
        "failed: %s\n",DXGetErrorString8(rc));