diff --git a/.travis.yml b/.travis.yml
index d7bf1e7..2cb0c5b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,7 +9,7 @@ os:
   - osx
 
 rust:
-- 1.20.0
+- 1.30.0
 - stable
 - nightly
 
diff --git a/src/transaction.rs b/src/transaction.rs
index ff95b27..16804d3 100644
--- a/src/transaction.rs
+++ b/src/transaction.rs
@@ -448,7 +448,7 @@ mod test {
         {
             let mut cur = txn.open_ro_cursor(db).unwrap();
             let iter = cur.iter_dup_of(b"key1");
-            let vals = iter.map(|(_,x)| x).collect::<Vec<_>>();
+            let vals = iter.map(|x| x.unwrap()).map(|(_,x)| x).collect::<Vec<_>>();
             assert_eq!(vals, vec![b"val1", b"val2", b"val3"]);
 
         }
@@ -463,7 +463,7 @@ mod test {
         {
             let mut cur = txn.open_ro_cursor(db).unwrap();
             let iter = cur.iter_dup_of(b"key1");
-            let vals = iter.map(|(_,x)| x).collect::<Vec<_>>();
+            let vals = iter.map(|x| x.unwrap()).map(|(_,x)| x).collect::<Vec<_>>();
             assert_eq!(vals, vec![b"val1", b"val3"]);
 
             let iter = cur.iter_dup_of(b"key2");