diff --git a/test/tools/runner/index.js b/test/tools/runner/index.js
index <HASH>..<HASH> 100644
--- a/test/tools/runner/index.js
+++ b/test/tools/runner/index.js
@@ -98,3 +98,8 @@ after(() => mock.cleanup());
 require('./plugins/deferred');
 require('./plugins/session_leak_checker');
 require('./plugins/client_leak_checker');
+
+// configure mocha and chai
+require('mocha-sinon');
+const chai = require('chai');
+chai.use(require('sinon-chai'));
chore: add sinon-chai and mocha-chai for all tests