diff --git a/module_usb_audio/devicedefines.h b/module_usb_audio/devicedefines.h
index 2f7c8a9c..70c3e0b2 100644
--- a/module_usb_audio/devicedefines.h
+++ b/module_usb_audio/devicedefines.h
@@ -88,9 +88,6 @@
     #endif
 #endif
 
-
-
-
 #if defined(IO_EXPANSION) && (IO_EXPANSION == 0)
 #undef IO_EXPANSION
 #endif
@@ -571,6 +568,13 @@
 #define DFU_PRODUCT_STR_INDEX       PRODUCT_STR_INDEX_A2
 #endif
 
+/* USB test mode support enabled by default (Required for compliance testing) */
+#if defined(TEST_MODE_SUPPORT) && (TEST_MODE_SUPPORT == 0)
+#undef TEST_MODE_SUPPORT
+#else
+#define TEST_MODE_SUPPORT  1
+#endif
+
 #if defined(FAST_MODE) && (FAST_MODE == 0)
 #undef FAST_MODE
 #endif