diff --git a/tests/bluetooth/mesh/blob_io_flash/src/main.c b/tests/bluetooth/mesh/blob_io_flash/src/main.c
index 18111e1565f..62fe590e6d9 100644
--- a/tests/bluetooth/mesh/blob_io_flash/src/main.c
+++ b/tests/bluetooth/mesh/blob_io_flash/src/main.c
@@ -68,7 +68,7 @@ ZTEST(blob_io_flash, test_chunk_read)
 	err = flash_area_open(SLOT1_PARTITION_ID, &fa);
 	zassert_equal(err, 0, "Preparing test data failed with err=%d", err);
 
-	err = flash_area_erase(fa, 0, ARRAY_SIZE(ctrl_data));
+	err = flash_area_flatten(fa, 0, ARRAY_SIZE(ctrl_data));
 	zassert_equal(err, 0, "Preparing test data failed with err=%d", err);
 
 	err = flash_area_write(fa, 0, test_data, ARRAY_SIZE(ctrl_data));