diff --git a/tests/xua_unit_tests/src/test_hid.xc b/tests/xua_unit_tests/src/test_hid.xc
new file mode 100644
index 00000000..0877f419
--- /dev/null
+++ b/tests/xua_unit_tests/src/test_hid.xc
@@ -0,0 +1,25 @@
+// Copyright 2021 XMOS LIMITED.
+// This Software is subject to the terms of the XMOS Public Licence: Version 1.
+#include "xua_unit_tests.h"
+
+in port p_mclk_in                   = XS1_PORT_1D;
+
+/* Clock-block declarations */
+clock clk_audio_bclk                = on tile[0]: XS1_CLKBLK_1;   /* Bit clock */
+clock clk_audio_mclk                = on tile[0]: XS1_CLKBLK_4;   /* Master clock */
+
+// Supply missing but unused function
+void AudioHwConfig(unsigned samFreq, unsigned mClk, unsigned dsdMode, unsigned sampRes_DAC, unsigned sampRes_ADC)
+{
+    ; // nothing
+}
+
+// Supply missing but unused function
+void AudioHwInit()
+{
+    ; // nothing
+}
+
+void test_null(){
+    TEST_ASSERT_MESSAGE(1, "Success!");
+}
diff --git a/tests/xua_unit_tests/src/test_hid/test_hid.xc b/tests/xua_unit_tests/src/test_hid/test_hid.xc
deleted file mode 100644
index d92a7efd..00000000
--- a/tests/xua_unit_tests/src/test_hid/test_hid.xc
+++ /dev/null
@@ -1,7 +0,0 @@
-// Copyright 2021 XMOS LIMITED.
-// This Software is subject to the terms of the XMOS Public Licence: Version 1.
-#include "xua_unit_tests.h"
-
-void test_null(){
-    TEST_ASSERT_MESSAGE(1, "Success!");
-}
diff --git a/tests/xua_unit_tests/src/xua_unit_tests.h b/tests/xua_unit_tests/src/xua_unit_tests.h
index 11fd6faf..addefeb9 100644
--- a/tests/xua_unit_tests/src/xua_unit_tests.h
+++ b/tests/xua_unit_tests/src/xua_unit_tests.h
@@ -8,6 +8,7 @@
 #ifdef __XC__
 
 #include <xs1.h>
+#include <platform.h>
 #include <xclib.h>
 
 #include "xua_conf.h"