diff --git a/crates/clawhdf5-io/src/async_read.rs b/crates/clawhdf5-io/src/async_read.rs
index f5277c0..fa87355 100644
--- a/crates/clawhdf5-io/src/async_read.rs
+++ b/crates/clawhdf5-io/src/async_read.rs
@@ -455,8 +455,10 @@ mod tests {
         assert_eq!(info.shape, [50, 100]);
         let values: Vec<i32> = info
             .raw
-            .chunks_exact(4)
-            .map(|b| i32::from_le_bytes(b.try_into().unwrap()))
+            .as_chunks::<4>()
+            .0
+            .iter()
+            .map(|&b| i32::from_le_bytes(b))
             .collect();
         let expected: Vec<i32> = (0..50).flat_map(|i| (0..100).map(move |j| i * j)).collect();
         assert_eq!(values, expected);