diff --git a/tests/rp/src/bin/uart_buffered.rs b/tests/rp/src/bin/uart_buffered.rs
index bea9283e..a1f0e2bf 100644
--- a/tests/rp/src/bin/uart_buffered.rs
+++ b/tests/rp/src/bin/uart_buffered.rs
@@ -26,13 +26,13 @@ async fn main(_spawner: Spawner) {
     // bufferedUart.
 
     let data = [
-        1u8, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
-        30, 31,
+        1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30,
+        31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
     ];
     uart.write_all(&data).await.unwrap();
     info!("Done writing");
 
-    let mut buf = [0; 31];
+    let mut buf = [0; 48];
     uart.read_exact(&mut buf).await.unwrap();
     assert_eq!(buf, data);