diff --git a/dlls/xaudio2_7/tests/xaudio2.c b/dlls/xaudio2_7/tests/xaudio2.c
index 502b513fb6b..ea7e2ec121a 100644
--- a/dlls/xaudio2_7/tests/xaudio2.c
+++ b/dlls/xaudio2_7/tests/xaudio2.c
@@ -27,6 +27,8 @@
 #include "xapo.h"
 #include "xapofx.h"
 #include "mmsystem.h"
+#include "ks.h"
+#include "ksmedia.h"
 
 static BOOL xaudio27;
 
@@ -937,6 +939,10 @@ static UINT32 test_DeviceDetails(IXAudio27 *xa)
             ok(dd.Role == GlobalDefaultDevice, "Got wrong role for index 0: 0x%x\n", dd.Role);
         else
             ok(dd.Role == NotDefaultDevice, "Got wrong role for index %u: 0x%x\n", i, dd.Role);
+
+        todo_wine
+        ok(IsEqualGUID(&dd.OutputFormat.SubFormat, &KSDATAFORMAT_SUBTYPE_PCM),
+           "got format %s\n", debugstr_guid(&dd.OutputFormat.SubFormat));
     }
 
     return count;