diff --git a/lib/pcm_mix/pcm_mix.c b/lib/pcm_mix/pcm_mix.c
index ac5cc4592b93..9dc6210f4f9b 100644
--- a/lib/pcm_mix/pcm_mix.c
+++ b/lib/pcm_mix/pcm_mix.c
@@ -2,6 +2,7 @@
  * Copyright (c) 2022 Nordic Semiconductor ASA
  *
  * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ * Enable for testing
  */
 
 #include <pcm_mix.h>