diff --git a/test/helpers/expectEvent.js b/test/helpers/expectEvent.js
index eb12bfd24..afdf0a9be 100644
--- a/test/helpers/expectEvent.js
+++ b/test/helpers/expectEvent.js
@@ -32,9 +32,9 @@ async function inTransaction (txHash, emitter, eventName, eventArgs = {}) {
 
 function contains (args, key, value) {
   if (isBigNumber(args[key])) {
-    args[key].should.be.bignumber.equal(value);
+    value.should.be.bignumber.equal(args[key]);
   } else {
-    args[key].should.be.equal(value);
+    value.should.be.equal(args[key]);
   }
 }