diff --git a/tests/bluetooth/audio/cap_commander/uut/CMakeLists.txt b/tests/bluetooth/audio/cap_commander/uut/CMakeLists.txt
index d91bfbcbe7a9fce..1213c9573673a0d 100644
--- a/tests/bluetooth/audio/cap_commander/uut/CMakeLists.txt
+++ b/tests/bluetooth/audio/cap_commander/uut/CMakeLists.txt
@@ -11,6 +11,7 @@ add_library(uut STATIC
   ${ZEPHYR_BASE}/subsys/bluetooth/audio/cap_common.c
   ${ZEPHYR_BASE}/subsys/logging/log_minimal.c
   ${ZEPHYR_BASE}/subsys/net/buf_simple.c
+  bap_broadcast_assistant.c
   csip.c
   vcp.c
   vocs.c
diff --git a/tests/bluetooth/audio/cap_commander/uut/bap_broadcast_assistant.c b/tests/bluetooth/audio/cap_commander/uut/bap_broadcast_assistant.c
new file mode 100644
index 000000000000000..193cdf7e0720220
--- /dev/null
+++ b/tests/bluetooth/audio/cap_commander/uut/bap_broadcast_assistant.c
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2023 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "zephyr/bluetooth/audio/bap.h"
+
+static struct bt_bap_broadcast_assistant_cb *broadcast_assistant_cbs;
+
+int bt_bap_broadcast_assistant_register_cb(struct bt_bap_broadcast_assistant_cb *cb)
+{
+	broadcast_assistant_cbs = cb;
+
+	return 0;
+}
+
+int bt_bap_broadcast_assistant_add_src(struct bt_conn *conn,
+				       const struct bt_bap_broadcast_assistant_add_src_param *param)
+{
+	/* Note that proper parameter checking is done in the caller */
+	zassert_not_null(conn, "conn is NULL");
+	zassert_not_null(param, "param is NULL");
+
+	if (broadcast_assistant_cbs->add_src != NULL) {
+		broadcast_assistant_cbs->add_src(conn, 0);
+	}
+
+	return 0;
+}