diff --git a/samples/drivers/spi_flash/src/main.c b/samples/drivers/spi_flash/src/main.c
index 059dc7d..b29cd9c 100644
--- a/samples/drivers/spi_flash/src/main.c
+++ b/samples/drivers/spi_flash/src/main.c
@@ -30,6 +30,8 @@
 #define SPI_FLASH_MULTI_SECTOR_TEST
 #endif
 
+const uint8_t erased[] = { 0xff, 0xff, 0xff, 0xff };
+
 void single_sector_test(const struct device *flash_dev)
 {
 	const uint8_t expected[] = { 0x55, 0xaa, 0x66, 0x99 };
@@ -53,9 +55,20 @@
 	if (rc != 0) {
 		printf("Flash erase failed! %d\n", rc);
 	} else {
+		/* Check erased pattern */
+		memset(buf, 0, len);
+		rc = flash_read(flash_dev, SPI_FLASH_TEST_REGION_OFFSET, buf, len);
+		if (rc != 0) {
+			printf("Flash read failed! %d\n", rc);
+			return;
+		}
+		if (memcmp(erased, buf, len) != 0) {
+			printf("Flash erase failed at offset 0x%x got 0x%x\n",
+				SPI_FLASH_TEST_REGION_OFFSET, *(uint32_t *)buf);
+			return;
+		}
 		printf("Flash erase succeeded!\n");
 	}
-
 	printf("\nTest 2: Flash write\n");
 
 	printf("Attempting to write %zu bytes\n", len);
@@ -98,7 +111,7 @@
 	uint8_t buf[sizeof(expected)];
 	int rc;
 
-	printf("\nPerform test on multiple consequtive sectors");
+	printf("\nPerform test on multiple consecutive sectors");
 
 	/* Write protection needs to be disabled before each write or
 	 * erase, since the flash component turns on write protection
@@ -125,9 +138,9 @@
 				printf("Flash read failed! %d\n", rc);
 				return;
 			}
-			if (buf[0] != 0xff) {
+			if (memcmp(erased, buf, len) != 0) {
 				printf("Flash erase failed at offset 0x%x got 0x%x\n",
-				offs, buf[0]);
+				offs, *(uint32_t *)buf);
 				return;
 			}
 			offs += SPI_FLASH_SECTOR_SIZE;