diff --git a/test/unit/app/siteHacksTest.js b/test/unit/app/siteHacksTest.js
new file mode 100644
index 00000000000..2144d90b1d4
--- /dev/null
+++ b/test/unit/app/siteHacksTest.js
@@ -0,0 +1,110 @@
+/* global describe, before, after, it */
+const mockery = require('mockery')
+const assert = require('assert')
+const sinon = require('sinon')
+
+require('../braveUnit')
+
+describe('siteHacks unit tests', function () {
+  let siteHacks
+  let beforeSendCB
+  // let beforeRequestCB
+  let urlParse
+  let filtering
+  const fakeElectron = require('../lib/fakeElectron')
+  const fakeAdBlock = require('../lib/fakeAdBlock')
+  const fakeFiltering = {
+    getMainFrameUrl: (details) => {
+      return filtering.getMainFrameUrl(details)
+    },
+    isResourceEnabled: (resourceName, url, isPrivate) => {
+      return true
+    },
+    registerBeforeSendHeadersFilteringCB: (cb) => {
+      beforeSendCB = cb
+    },
+    registerBeforeRequestFilteringCB: (cb) => {
+      // beforeRequestCB = cb
+    }
+  }
+
+  before(function () {
+    mockery.enable({
+      warnOnReplace: false,
+      warnOnUnregistered: false,
+      useCleanCache: true
+    })
+
+    mockery.registerMock('electron', fakeElectron)
+    mockery.registerMock('ad-block', fakeAdBlock)
+    urlParse = require('../../../app/common/urlParse')
+    mockery.registerMock('./common/urlParse', urlParse)
+    filtering = require('../../../app/filtering')
+    mockery.registerMock('./filtering', fakeFiltering)
+
+    siteHacks = require('../../../app/siteHacks')
+  })
+
+  after(function () {
+    mockery.disable()
+  })
+
+  describe('init', function () {
+    let beforeSendSpy
+    let beforeRequestSpy
+
+    before(function () {
+      beforeSendSpy = sinon.spy(fakeFiltering, 'registerBeforeSendHeadersFilteringCB')
+      beforeRequestSpy = sinon.spy(fakeFiltering, 'registerBeforeRequestFilteringCB')
+      siteHacks.init()
+    })
+    after(function () {
+      beforeSendSpy.restore()
+      beforeRequestSpy.restore()
+    })
+
+    it('calls Filtering.registerBeforeSendHeadersFilteringCB', function () {
+      assert.equal(beforeSendSpy.calledOnce, true)
+    })
+
+    describe('in the callback passed into registerBeforeSendHeadersFilteringCB', function () {
+      let getMainFrameUrlSpy
+      // let result
+      const details = {
+        resourceType: 'mainFrame',
+        requestHeaders: {
+          'User-Agent': 'Brave Chrome'
+        },
+        url: 'https://brave.com',
+        tabId: 1
+      }
+      before(function () {
+        getMainFrameUrlSpy = sinon.spy(fakeFiltering, 'getMainFrameUrl')
+        if (typeof beforeSendCB === 'function') {
+          // result = beforeSendCB(details)
+          beforeSendCB(details)
+        }
+      })
+      after(function () {
+        getMainFrameUrlSpy.restore()
+      })
+
+      it('calls Filtering.getMainFrameUrl', function () {
+        assert.equal(getMainFrameUrlSpy.calledOnce, true)
+      })
+    })
+
+    it('calls Filtering.registerBeforeRequestFilteringCB', function () {
+      assert.equal(beforeRequestSpy.calledOnce, true)
+    })
+
+    // describe('in the callback passed into registerBeforeRequestFilteringCB', function () {
+    //   let result
+    //   before(function () {
+    //     if (typeof beforeRequestCB === 'function') {
+    //       result = beforeRequestCB()
+    //     }
+    //   })
+    // })
+  })
+})