diff --git a/spec/atom-environment-spec.coffee b/spec/atom-environment-spec.coffee
index ecce91428..7edce76ce 100644
--- a/spec/atom-environment-spec.coffee
+++ b/spec/atom-environment-spec.coffee
@@ -213,7 +213,7 @@ describe "AtomEnvironment", ->
 
   describe "::unloadEditorWindow()", ->
     it "saves the serialized state of the window so it can be deserialized after reload", ->
-      atomEnvironment = new AtomEnvironment
+      atomEnvironment = new AtomEnvironment(setRepresentedFilename: ->)
       spyOn(atomEnvironment, 'saveStateSync')
 
       workspaceState = atomEnvironment.workspace.serialize()
@@ -229,7 +229,7 @@ describe "AtomEnvironment", ->
 
   describe "::destroy()", ->
     it "unsubscribes from all buffers", ->
-      atomEnvironment = new AtomEnvironment
+      atomEnvironment = new AtomEnvironment(setRepresentedFilename: ->)
 
       waitsForPromise ->
         atomEnvironment.workspace.open("sample.js")
diff --git a/spec/jasmine-test-runner.coffee b/spec/jasmine-test-runner.coffee
index a245379e2..a8d165562 100644
--- a/spec/jasmine-test-runner.coffee
+++ b/spec/jasmine-test-runner.coffee
@@ -5,11 +5,17 @@ path = require 'path'
 ipc = require 'ipc'
 
 module.exports = ({logFile, headless, testPaths, buildAtomEnvironment}) ->
-  window.atom = buildAtomEnvironment()
-
   window[key] = value for key, value of require '../vendor/jasmine'
   require 'jasmine-tagged'
 
+  # Allow document.title to be assigned in specs without screwing up spec window title
+  documentTitle = null
+  Object.defineProperty document, 'title',
+    get: -> documentTitle
+    set: (title) -> documentTitle = title
+
+  window.atom = buildAtomEnvironment({setRepresentedFilename: jasmine.createSpy('setRepresentedFilename')})
+
   require './spec-helper'
   disableFocusMethods() if process.env.JANKY_SHA1 or process.env.CI
   requireSpecs(testPath) for testPath in testPaths
diff --git a/spec/spec-helper.coffee b/spec/spec-helper.coffee
index 7953563e7..a9446fa93 100644
--- a/spec/spec-helper.coffee
+++ b/spec/spec-helper.coffee
@@ -28,12 +28,6 @@ atom.packages.packageDirPaths.unshift(fixturePackagesPath)
 document.querySelector('html').style.overflow = 'auto'
 document.body.style.overflow = 'auto'
 
-# Allow document.title to be assigned in specs without screwing up spec window title
-documentTitle = null
-Object.defineProperty document, 'title',
-  get: -> documentTitle
-  set: (title) -> documentTitle = title
-
 Set.prototype.jasmineToString = ->
   result = "Set {"
   first = true
@@ -112,7 +106,6 @@ beforeEach ->
   # make editor display updates synchronous
   TextEditorElement::setUpdatedSynchronously(true)
 
-  spyOn(atom, "setRepresentedFilename")
   spyOn(pathwatcher.File.prototype, "detectResurrectionAfterDelay").andCallFake -> @detectResurrection()
   spyOn(TextEditor.prototype, "shouldPromptToSave").andReturn false
 
diff --git a/src/atom-environment.coffee b/src/atom-environment.coffee
index a4acb57d0..a1619deec 100644
--- a/src/atom-environment.coffee
+++ b/src/atom-environment.coffee
@@ -104,7 +104,10 @@ class AtomEnvironment extends Model
   ###
 
   # Call .loadOrCreate instead
-  constructor: ->
+  constructor: (params={}) ->
+    {setRepresentedFilename} = params
+    @setRepresentedFilename = setRepresentedFilename if setRepresentedFilename?
+
     @state = {version: @constructor.version}
 
     @loadTime = null
diff --git a/src/initialize-test-window.coffee b/src/initialize-test-window.coffee
index 4744f8544..28e22c0d6 100644
--- a/src/initialize-test-window.coffee
+++ b/src/initialize-test-window.coffee
@@ -42,7 +42,7 @@ try
     logFile: getWindowLoadSettings().logFile
     headless: getWindowLoadSettings().headless
     testPaths: getWindowLoadSettings().testPaths
-    buildAtomEnvironment: -> new AtomEnvironment
+    buildAtomEnvironment: (params) -> new AtomEnvironment(params)
     legacyTestRunner: legacyTestRunner
   })
 catch error