diff --git a/samples/bluetooth/hci_uart_async/app.overlay b/samples/bluetooth/hci_uart_async/boards/nrf52833dk_nrf52833.overlay
similarity index 100%
rename from samples/bluetooth/hci_uart_async/app.overlay
rename to samples/bluetooth/hci_uart_async/boards/nrf52833dk_nrf52833.overlay
diff --git a/samples/bluetooth/hci_uart_async/boards/nrf54l15pdk_nrf54l15_cpuapp.overlay b/samples/bluetooth/hci_uart_async/boards/nrf54l15pdk_nrf54l15_cpuapp.overlay
new file mode 100644
index 00000000000..7ba5755c681
--- /dev/null
+++ b/samples/bluetooth/hci_uart_async/boards/nrf54l15pdk_nrf54l15_cpuapp.overlay
@@ -0,0 +1,12 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+ &uart20 {
+	compatible = "nordic,nrf-uarte";
+	current-speed = <1000000>;
+	status = "okay";
+	hw-flow-control;
+};
diff --git a/samples/bluetooth/hci_uart_async/sample.yaml b/samples/bluetooth/hci_uart_async/sample.yaml
index 7faad998c6f..0425d29a4a4 100644
--- a/samples/bluetooth/hci_uart_async/sample.yaml
+++ b/samples/bluetooth/hci_uart_async/sample.yaml
@@ -17,3 +17,11 @@ tests:
     tags:
       - uart
       - bluetooth
+  sample.bluetooth.hci_uart.nrf54l15.all:
+    harness: bluetooth
+    platform_allow: nrf54l15pdk/nrf54l15/cpuapp
+    integration_platforms:
+      - nrf54l15pdk/nrf54l15/cpuapp
+    tags:
+      - uart
+      - bluetooth
diff --git a/samples/bluetooth/hci_uart_async/src/main.c b/samples/bluetooth/hci_uart_async/src/main.c
index 2d38d83e45c..c2ed2006856 100644
--- a/samples/bluetooth/hci_uart_async/src/main.c
+++ b/samples/bluetooth/hci_uart_async/src/main.c
@@ -2,7 +2,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-extern int hci_uart_main(void);
+extern void hci_uart_main(void);
 
 int main(void)
 {