diff --git a/samples/drivers/adc/boards/disco_l475_iot1.overlay b/samples/drivers/adc/boards/disco_l475_iot1.overlay
new file mode 100644
index 00000000000..f4b57290698
--- /dev/null
+++ b/samples/drivers/adc/boards/disco_l475_iot1.overlay
@@ -0,0 +1,12 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Copyright (c) 2020 Linaro Limited
+ */
+
+/ {
+	zephyr,user {
+		/* adjust channel number according to pinmux in board.dts */
+		io-channels = <&adc1 5>;
+	};
+};
diff --git a/samples/drivers/adc/sample.yaml b/samples/drivers/adc/sample.yaml
index ab10b8b4dad..7b978ae5848 100644
--- a/samples/drivers/adc/sample.yaml
+++ b/samples/drivers/adc/sample.yaml
@@ -4,9 +4,10 @@ tests:
   sample.drivers.adc:
     tags: ADC
     depends_on: adc
-    platform_allow: nucleo_l073rz
+    platform_allow: nucleo_l073rz disco_l475_iot1
     harness: console
+    timeout: 10
     harness_config:
-      type: single_line
+      type: one_line
       regex:
-        - "ADC reading(s): (.*)"
+        - "ADC reading: (.*)"
diff --git a/samples/drivers/adc/src/main.c b/samples/drivers/adc/src/main.c
index 35585c6fe51..338f892eed8 100644
--- a/samples/drivers/adc/src/main.c
+++ b/samples/drivers/adc/src/main.c
@@ -98,7 +98,7 @@ void main(void)
 			return;
 		}
 
-		printk("ADC reading(s):");
+		printk("ADC reading:");
 		for (uint8_t i = 0; i < ADC_NUM_CHANNELS; i++) {
 			int32_t raw_value = sample_buffer[i];