diff --git a/src/lib.rs b/src/lib.rs
index 9db0e61..5e6d474 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -670,3 +670,22 @@ where
 
 const JOSE_JSON: &str = "application/jose+json";
 const REPLAY_NONCE: &str = "Replay-Nonce";
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[tokio::test]
+    async fn deserialize_old_credentials() -> Result<(), Error> {
+        const CREDENTIALS: &str = r#"{"id":"id","key_pkcs8":"MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgJVWC_QzOTCS5vtsJp2IG-UDc8cdDfeoKtxSZxaznM-mhRANCAAQenCPoGgPFTdPJ7VLLKt56RxPlYT1wNXnHc54PEyBg3LxKaH0-sJkX0mL8LyPEdsfL_Oz4TxHkWLJGrXVtNhfH","urls":{"newNonce":"new-nonce","newAccount":"new-acct","newOrder":"new-order"}}"#;
+        Account::from_credentials(serde_json::from_str::<AccountCredentials>(CREDENTIALS)?).await?;
+        Ok(())
+    }
+
+    #[tokio::test]
+    async fn deserialize_new_credentials() -> Result<(), Error> {
+        const CREDENTIALS: &str = r#"{"id":"id","key_pkcs8":"MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgJVWC_QzOTCS5vtsJp2IG-UDc8cdDfeoKtxSZxaznM-mhRANCAAQenCPoGgPFTdPJ7VLLKt56RxPlYT1wNXnHc54PEyBg3LxKaH0-sJkX0mL8LyPEdsfL_Oz4TxHkWLJGrXVtNhfH","directory":"https://acme-staging-v02.api.letsencrypt.org/directory"}"#;
+        Account::from_credentials(serde_json::from_str::<AccountCredentials>(CREDENTIALS)?).await?;
+        Ok(())
+    }
+}