diff --git a/tests/drivers/clock_control/clock_control_api/boards/nrf54l09pdk_nrf54l09_cpuapp.conf b/tests/drivers/clock_control/clock_control_api/boards/nrf54l09pdk_nrf54l09_cpuapp.conf
index 11d42321cbc..377287fb194 100644
--- a/tests/drivers/clock_control/clock_control_api/boards/nrf54l09pdk_nrf54l09_cpuapp.conf
+++ b/tests/drivers/clock_control/clock_control_api/boards/nrf54l09pdk_nrf54l09_cpuapp.conf
@@ -1 +1 @@
-CONFIG_TEST_NRF_HF_STARTUP_TIME_US=1000
+CONFIG_TEST_NRF_HF_STARTUP_TIME_US=2000
diff --git a/tests/drivers/clock_control/clock_control_api/boards/nrf54l20pdk_nrf54l20_cpuapp.conf b/tests/drivers/clock_control/clock_control_api/boards/nrf54l20pdk_nrf54l20_cpuapp.conf
index 11d42321cbc..377287fb194 100644
--- a/tests/drivers/clock_control/clock_control_api/boards/nrf54l20pdk_nrf54l20_cpuapp.conf
+++ b/tests/drivers/clock_control/clock_control_api/boards/nrf54l20pdk_nrf54l20_cpuapp.conf
@@ -1 +1 @@
-CONFIG_TEST_NRF_HF_STARTUP_TIME_US=1000
+CONFIG_TEST_NRF_HF_STARTUP_TIME_US=2000