diff --git a/test/parallel/test-tls-getprotocol.js b/test/parallel/test-tls-getprotocol.js
index dd96aa6f7494a6..bf75eb8a398647 100644
--- a/test/parallel/test-tls-getprotocol.js
+++ b/test/parallel/test-tls-getprotocol.js
@@ -3,9 +3,12 @@ const common = require('../common');
 if (!common.hasCrypto)
   common.skip('missing crypto');
 
+// This test ensures that `getProtocol` returns the right protocol
+// from a TLS connection
+
 const assert = require('assert');
 const tls = require('tls');
-const fs = require('fs');
+const fixtures = require('../common/fixtures');
 
 const clientConfigs = [
   { secureProtocol: 'TLSv1_method', version: 'TLSv1' },
@@ -14,8 +17,8 @@ const clientConfigs = [
 ];
 
 const serverConfig = {
-  key: fs.readFileSync(`${common.fixturesDir}/keys/agent2-key.pem`),
-  cert: fs.readFileSync(`${common.fixturesDir}/keys/agent2-cert.pem`)
+  key: fixtures.readSync('/keys/agent2-key.pem'),
+  cert: fixtures.readSync('/keys/agent2-cert.pem')
 };
 
 const server = tls.createServer(serverConfig, common.mustCall(function() {