diff --git a/src/quic/server.rs b/src/quic/server.rs
index c5e0811..c825182 100644
--- a/src/quic/server.rs
+++ b/src/quic/server.rs
@@ -32,7 +32,7 @@ fn configure_server(
             let cert_der = CertificateDer::from(cert.cert);
             (cert_der, PrivatePkcs8KeyDer::from(cert.key_pair.serialize_der()))
         } else {
-            let mut certs: Vec<_> = CertificateDer::pem_file_iter("tests/data/certificate.chain.pem")
+            let mut certs: Vec<_> = CertificateDer::pem_file_iter(cert_file.clone().unwrap())
                 .unwrap()
                 .collect();
             let cert = certs.pop().unwrap().unwrap();