diff --git a/tests/drivers/regulator/voltage/boards/nrf52840dk_nrf52840.overlay b/tests/drivers/regulator/voltage/boards/nrf52840dk_nrf52840_npm6001.overlay
similarity index 100%
rename from tests/drivers/regulator/voltage/boards/nrf52840dk_nrf52840.overlay
rename to tests/drivers/regulator/voltage/boards/nrf52840dk_nrf52840_npm6001.overlay
diff --git a/tests/drivers/regulator/voltage/testcase.yaml b/tests/drivers/regulator/voltage/testcase.yaml
index 38ed4009884..ce9091da501 100644
--- a/tests/drivers/regulator/voltage/testcase.yaml
+++ b/tests/drivers/regulator/voltage/testcase.yaml
@@ -4,10 +4,10 @@
 common:
   tags: drivers regulator
   harness: ztest
-  harness_config:
-    fixture: regulator_output_to_adc
 
 tests:
   drivers.regulator.voltage.nrf52840dk_nrf52840_npm6001:
     platform_allow: nrf52840dk_nrf52840
-    extra_args: SHIELD=npm6001_ek
+    extra_args: DTC_OVERLAY_FILE=boards/nrf52840dk_nrf52840_npm6001.overlay SHIELD=npm6001_ek
+    harness_config:
+      fixture: npm6001_ek_to_adc