diff --git a/tests/drivers/clock_control/clock_control_api/testcase.yaml b/tests/drivers/clock_control/clock_control_api/testcase.yaml
index 972dcc1a1aa..65a0491c476 100644
--- a/tests/drivers/clock_control/clock_control_api/testcase.yaml
+++ b/tests/drivers/clock_control/clock_control_api/testcase.yaml
@@ -39,4 +39,4 @@ tests:
       - ophelia4ev/nrf54l15/cpuapp
     integration_platforms:
       - nrf51dk/nrf51822
-    extra_args: CONF_FILE="nrf_lfclk_rc.conf"
+    extra_args: EXTRA_CONF_FILE="nrf_lfclk_rc.conf"