diff --git a/spec-nylas/stores/file-download-store-spec.coffee b/spec-nylas/stores/file-download-store-spec.coffee
index 115ce8cfc..23c932224 100644
--- a/spec-nylas/stores/file-download-store-spec.coffee
+++ b/spec-nylas/stores/file-download-store-spec.coffee
@@ -61,24 +61,24 @@ describe "FileDownloadStore", ->
   describe "_checkForDownloadedFile", ->
     it "should return true if the file exists at the path and is the right size", ->
       f = new File(filename: '123.png', contentType: 'image/png', id: "id", size: 100)
-      spyOn(fs, 'stat').andCallFake (path, callback) ->
-        callback(null, {size: 100})
+      spyOn(fs, 'statAsync').andCallFake (path) ->
+        Promise.resolve({size: 100})
       waitsForPromise ->
         FileDownloadStore._checkForDownloadedFile(f).then (downloaded) ->
           expect(downloaded).toBe(true)
 
     it "should return false if the file does not exist", ->
       f = new File(filename: '123.png', contentType: 'image/png', id: "id", size: 100)
-      spyOn(fs, 'stat').andCallFake (path, callback) ->
-        callback(new Error("File does not exist"))
+      spyOn(fs, 'statAsync').andCallFake (path) ->
+        Promise.reject(new Error("File does not exist"))
       waitsForPromise ->
         FileDownloadStore._checkForDownloadedFile(f).then (downloaded) ->
           expect(downloaded).toBe(false)
 
     it "should return false if the file is too small", ->
       f = new File(filename: '123.png', contentType: 'image/png', id: "id", size: 100)
-      spyOn(fs, 'stat').andCallFake (path, callback) ->
-        callback(null, {size: 50})
+      spyOn(fs, 'statAsync').andCallFake (path) ->
+        Promise.resolve({size: 50})
       waitsForPromise ->
         FileDownloadStore._checkForDownloadedFile(f).then (downloaded) ->
           expect(downloaded).toBe(false)