diff --git a/util/src/kvdb.rs b/util/src/kvdb.rs
index 8006c4ccb..084969f30 100644
--- a/util/src/kvdb.rs
+++ b/util/src/kvdb.rs
@@ -910,7 +910,7 @@ mod tests {
 
 		assert_eq!(&*db.get(None, &key1).unwrap().unwrap(), b"cat");
 
-		let contents: Vec<_> = db.iter(None).collect();
+		let contents: Vec<_> = db.iter(None).into_iter().flat_map(|inner| inner).collect();
 		assert_eq!(contents.len(), 2);
 		assert_eq!(&*contents[0].0, &*key1);
 		assert_eq!(&*contents[0].1, b"cat");
diff --git a/util/src/migration/tests.rs b/util/src/migration/tests.rs
index 31226ec49..a246f65c8 100644
--- a/util/src/migration/tests.rs
+++ b/util/src/migration/tests.rs
@@ -94,7 +94,7 @@ impl Migration for AddsColumn {
 	fn migrate(&mut self, source: Arc<Database>, config: &Config, dest: &mut Database, col: Option<u32>) -> Result<(), Error> {
 		let mut batch = Batch::new(config, col);
 
-		for (key, value) in source.iter(col) {
+		for (key, value) in source.iter(col).into_iter().flat_map(|inner| inner) {
 			batch.insert(key.to_vec(), value.to_vec(), dest)?;
 		}