diff --git a/tests/bluetooth/tester/boards/nrf54l15dk_nrf54l15_cpuapp.conf b/tests/bluetooth/tester/boards/nrf54l15dk_nrf54l15_cpuapp.conf
index 42d99961e0ad..cacd8811a28f 100644
--- a/tests/bluetooth/tester/boards/nrf54l15dk_nrf54l15_cpuapp.conf
+++ b/tests/bluetooth/tester/boards/nrf54l15dk_nrf54l15_cpuapp.conf
@@ -1,3 +1,3 @@
 CONFIG_ZMS=y
-CONFIG_BT_RX_STACK_SIZE=4096
+CONFIG_BT_RX_STACK_SIZE=5120
 CONFIG_BT_MESH_ADV_STACK_SIZE=2048