Bug 1504201 - [marionette] Temporarily skip TestScreenCaptureChrome.test_formats on Linux. r=whimboo

testing/marionette/harness/marionette_harness/tests/unit/test_screenshot.py

@@ -8,7 +8,9 @@ import base64
 import hashlib
 import imghdr
 import struct
+import sys
 import tempfile
+import unittest
 import urllib
 
 from marionette_driver import By
@@ -205,6 +207,7 @@ class TestScreenCaptureChrome(WindowManagerMixin, ScreenCaptureTestCase):
         self.marionette.switch_to_window(self.start_window)
 
     @skip_if_mobile("Fennec doesn't support other chrome windows")
+    @unittest.skipIf(sys.platform.startswith("linux"), "Bug 1504201")
     def test_formats(self):
         dialog = self.open_dialog()
         self.marionette.switch_to_window(dialog)