diff --git a/openssl/src/cms.rs b/openssl/src/cms.rs
index 3b4964c9fe73648dd801bfb699249ac2830d32a8..b2a10d01639eba5994d5e91136f7bf97896ee0e2 100644
--- a/openssl/src/cms.rs
+++ b/openssl/src/cms.rs
@@ -411,7 +411,7 @@ mod test {
 
         // check verification result -  valid signature
         res.unwrap();
-        assert_eq!(data.len(), out_data.len());
+        assert_eq!(data.to_vec(), out_data);
     }
 
     #[test]