diff --git a/lib/object_to_query_param_string.js b/lib/object_to_query_param_string.js
index 445abce7..b10b8889 100644
--- a/lib/object_to_query_param_string.js
+++ b/lib/object_to_query_param_string.js
@@ -1,4 +1,3 @@
-// istanbul ignore file
 'use strict';
 
 var isArray = require('lodash/isArray');
diff --git a/test/object_to_query_param_string.test.js b/test/object_to_query_param_string.test.js
index 71dd4db8..68b09cdf 100644
--- a/test/object_to_query_param_string.test.js
+++ b/test/object_to_query_param_string.test.js
@@ -43,6 +43,7 @@ describe('objectToQueryParamString', function() {
 
     it('serializes arrays', function() {
         expect(objectToQueryParamString({arr: [1]})).toBe(encodeURIComponent('arr[]') + '=1');
+        expect(objectToQueryParamString({'arr[]': [1]})).toBe(encodeURIComponent('arr[]') + '=1');
         expect(objectToQueryParamString({arr: [1, 2]})).toBe(
             [
                 encodeURIComponent('arr[]'),