diff --git a/test/parallel/test-tls-cert-chains-in-ca.js b/test/parallel/test-tls-cert-chains-in-ca.js
index 69f62c3f72..3b4e78919f 100644
--- a/test/parallel/test-tls-cert-chains-in-ca.js
+++ b/test/parallel/test-tls-cert-chains-in-ca.js
@@ -12,8 +12,7 @@ const {
 
 // agent6-cert.pem includes cert for agent6 and ca3, split it apart and
 // provide ca3 in the .ca property.
-const agent6Chain = keys.agent6.cert.split('-----END CERTIFICATE-----')
-  .map((c) => { return c + '-----END CERTIFICATE-----'; });
+const agent6Chain = keys.agent6.cert.split(/(?=-----BEGIN CERTIFICATE-----)/);
 const agent6End = agent6Chain[0];
 const agent6Middle = agent6Chain[1];
 connect({