diff --git a/test/connection/test_connection.js b/test/connection/test_connection.js
index 3cc7bf2..fafa883 100644
--- a/test/connection/test_connection.js
+++ b/test/connection/test_connection.js
@@ -1,5 +1,6 @@
 import test from 'ava'
 import sinon from 'sinon'
+import * as request from '../../src/request' // eslint-disable-line
 import { Connection } from '../../src'
 
 const API_PATH = 'http://localhost:9984/api/v1/'
@@ -24,6 +25,24 @@ test('generate API URLS', t => {
 })
 
 
+test('Request with custom headers', t => {
+    const testConn = new Connection(API_PATH, { hello: 'world' })
+    const expectedOptions = {
+        headers: {
+            hello: 'world',
+            custom: 'headers'
+        }
+    }
+
+    // request is read only, cannot be mocked?
+    sinon.spy(request, 'default')
+    testConn._req(API_PATH, { headers: { custom: 'headers' } })
+
+    t.truthy(request.default.calledWith(API_PATH, expectedOptions))
+    request.default.restore()
+})
+
+
 test('Get block for a block id', t => {
     const expectedPath = 'path'
     const blockId = 'abc'