diff --git a/dlls/quartz/tests/acmwrapper.c b/dlls/quartz/tests/acmwrapper.c
index 571e78d9df3..a543893d792 100644
--- a/dlls/quartz/tests/acmwrapper.c
+++ b/dlls/quartz/tests/acmwrapper.c
@@ -61,6 +61,7 @@ static void check_interface_(unsigned int line, void *iface_ptr, REFIID iid, BOO
 static void test_interfaces(void)
 {
     IBaseFilter *filter = create_acm_wrapper();
+    IPin *pin;
 
     check_interface(filter, &IID_IBaseFilter, TRUE);
     check_interface(filter, &IID_IMediaFilter, TRUE);
@@ -80,6 +81,30 @@ static void test_interfaces(void)
     check_interface(filter, &IID_IReferenceClock, FALSE);
     check_interface(filter, &IID_IVideoWindow, FALSE);
 
+    IBaseFilter_FindPin(filter, sink_id, &pin);
+
+    check_interface(pin, &IID_IMemInputPin, TRUE);
+    check_interface(pin, &IID_IPin, TRUE);
+    todo_wine check_interface(pin, &IID_IQualityControl, TRUE);
+    check_interface(pin, &IID_IUnknown, TRUE);
+
+    check_interface(pin, &IID_IMediaPosition, FALSE);
+    todo_wine check_interface(pin, &IID_IMediaSeeking, FALSE);
+
+    IPin_Release(pin);
+
+    IBaseFilter_FindPin(filter, source_id, &pin);
+
+    check_interface(pin, &IID_IPin, TRUE);
+    todo_wine check_interface(pin, &IID_IMediaPosition, TRUE);
+    check_interface(pin, &IID_IMediaSeeking, TRUE);
+    check_interface(pin, &IID_IQualityControl, TRUE);
+    check_interface(pin, &IID_IUnknown, TRUE);
+
+    check_interface(pin, &IID_IAsyncReader, FALSE);
+
+    IPin_Release(pin);
+
     IBaseFilter_Release(filter);
 }