diff --git a/boards/arm/nucleo_g071rb/nucleo_g071rb.dts b/boards/arm/nucleo_g071rb/nucleo_g071rb.dts
index c9f1a2b6575..76b2369280e 100644
--- a/boards/arm/nucleo_g071rb/nucleo_g071rb.dts
+++ b/boards/arm/nucleo_g071rb/nucleo_g071rb.dts
@@ -140,7 +140,7 @@
 &adc1 {
 	pinctrl-0 = <&adc1_in0_pa0 &adc1_in1_pa1>;
 	pinctrl-names = "default";
-	st,adc-clock-source = <SYNC>;
+	st,adc-clock-source = <ASYNC>;
 	st,adc-prescaler = <4>;
 	status = "okay";
 	vref-mv = <3300>;
diff --git a/tests/drivers/adc/adc_api/boards/nucleo_g071rb.overlay b/tests/drivers/adc/adc_api/boards/nucleo_g071rb.overlay
index f0d65c1e941..a40478a6ee1 100644
--- a/tests/drivers/adc/adc_api/boards/nucleo_g071rb.overlay
+++ b/tests/drivers/adc/adc_api/boards/nucleo_g071rb.overlay
@@ -7,7 +7,7 @@
 / {
 	zephyr,user {
 		/* adjust channel number according to pinmux in board.dts */
-		io-channels = <&adc1 0>;
+		io-channels = <&adc1 0>, <&adc1 1>;
 	};
 };
 
@@ -19,7 +19,15 @@
 		reg = <0>;
 		zephyr,gain = "ADC_GAIN_1";
 		zephyr,reference = "ADC_REF_INTERNAL";
-		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,acquisition-time = <ADC_ACQ_TIME_MAX>;
+		zephyr,resolution = <12>;
+	};
+
+	channel@1 {
+		reg = <1>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_MAX>;
 		zephyr,resolution = <12>;
 	};
 };