diff --git a/jupyterhub/tests/selenium/conftest.py b/jupyterhub/tests/selenium/conftest.py
index 9454e0f3..a68ce6e3 100644
--- a/jupyterhub/tests/selenium/conftest.py
+++ b/jupyterhub/tests/selenium/conftest.py
@@ -5,8 +5,8 @@ from selenium import webdriver
 @pytest.fixture()
 def browser():
     options = webdriver.FirefoxOptions()
-    options.set_headless()
-    driver = webdriver.Firefox(firefox_options=options)
+    options.headless = True
+    driver = webdriver.Firefox(options=options)
     yield driver
     driver.close()
     driver.quit()