Explicit headless option instead of env var

Author: benmurden

.travis.yml

@@ -17,13 +17,10 @@ before_install:
     - export PATH=$PATH:$PWD/geckodriver
 
 env:
-    matrix:
-        - DJANGO=1.8
-        - DJANGO=1.9
-        - DJANGO=1.10
-        - DJANGO=1.11
-    global:
-        - MOZ_HEADLESS=1
+    - DJANGO=1.8
+    - DJANGO=1.9
+    - DJANGO=1.10
+    - DJANGO=1.11
 
 matrix:
     fast_finish: true

testapp/tests.py

@@ -8,6 +8,7 @@
 from selenium.webdriver import Firefox
 from selenium.webdriver.common.by import By
 from selenium.webdriver.common.keys import Keys
+from selenium.webdriver.firefox.options import Options
 from selenium.webdriver.support import expected_conditions as EC
 from selenium.webdriver.support.ui import WebDriverWait
 
@@ -65,7 +66,9 @@ def test_extra_attrs(self):
 
 class AcceptanceTest(StaticLiveServerTestCase):
     def setUp(self):
-        self.driver = Firefox()
+        options = Options()
+        options.add_argument('-headless')
+        self.driver = Firefox(firefox_options=options)
 
     def tearDown(self):
         self.driver.quit()