diff --git a/tests/bluetooth/mesh/microbit.conf b/tests/bluetooth/mesh/microbit.conf
index fb207123593..06988f80ea8 100644
--- a/tests/bluetooth/mesh/microbit.conf
+++ b/tests/bluetooth/mesh/microbit.conf
@@ -1,6 +1,6 @@
 CONFIG_TEST=y
 CONFIG_INIT_STACKS=y
-CONFIG_MAIN_STACK_SIZE=512
+CONFIG_MAIN_STACK_SIZE=480
 CONFIG_DISPLAY=y
 CONFIG_MICROBIT_DISPLAY=y
 CONFIG_GPIO=y
@@ -53,3 +53,5 @@ CONFIG_BT_MESH_LABEL_COUNT=0
 #CONFIG_BT_MESH_DEBUG_CRYPTO=y
 #CONFIG_BT_MESH_DEBUG_ADV=y
 #CONFIG_BT_MESH_DEBUG_ACCESS=y
+
+CONFIG_CLOCK_CONTROL_NRF_CALIBRATION_MAX_SKIP=0