diff --git a/tests/drivers/uart/uart_mix_fifo_poll/boards/nrf54l15bsim_nrf54l15_cpuapp.overlay b/tests/drivers/uart/uart_mix_fifo_poll/boards/nrf54l15bsim_nrf54l15_cpuapp.overlay
new file mode 100644
index 00000000000..10b8825014f
--- /dev/null
+++ b/tests/drivers/uart/uart_mix_fifo_poll/boards/nrf54l15bsim_nrf54l15_cpuapp.overlay
@@ -0,0 +1,3 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
+#include "nrf54l15dk_nrf54l15_cpuapp.overlay"
diff --git a/tests/drivers/uart/uart_mix_fifo_poll/testcase.yaml b/tests/drivers/uart/uart_mix_fifo_poll/testcase.yaml
index 91470dc990b..13f1d52d4d5 100644
--- a/tests/drivers/uart/uart_mix_fifo_poll/testcase.yaml
+++ b/tests/drivers/uart/uart_mix_fifo_poll/testcase.yaml
@@ -10,6 +10,7 @@ common:
     - nrf5340dk/nrf5340/cpuapp
     - nrf5340bsim/nrf5340/cpuapp
     - nrf54l15dk/nrf54l15/cpuapp
+    - nrf54l15bsim/nrf54l15/cpuapp
     - nrf54h20dk/nrf54h20/cpuapp
     - nrf54h20dk/nrf54h20/cpurad
     - nrf52_bsim