diff --git a/src/rstd/atomic/au64.rs b/src/rstd/atomic/au64.rs
index b66d506..f7955dc 100644
--- a/src/rstd/atomic/au64.rs
+++ b/src/rstd/atomic/au64.rs
@@ -73,4 +73,9 @@ mod tests {
             0x0807060504030201,
         );
     }
+
+    #[test]
+    fn cannot_parse_empty_slice() {
+        assert_eq!(u64::parse_slice(&[]).unwrap_err(), IntParseError::Eof);
+    }
 }