diff --git a/spec/rails_helper.rb b/spec/rails_helper.rb
index 862b0316d..ec3f6af77 100644
--- a/spec/rails_helper.rb
+++ b/spec/rails_helper.rb
@@ -104,12 +104,14 @@ RSpec.configure do |config|
 
   # Prevent Poltergeist from fetching external URLs during feature tests
   config.before(:each, js: true) do
-    page.driver.browser.url_blacklist = [
-      'gravatar.com',
-      'mapbox.com',
-      'okfn.org',
-      'googlecode.com'
-    ] if page.driver.browser.respond_to?(:url_blacklist)
+    if page.driver.browser.respond_to?(:url_blacklist)
+      page.driver.browser.url_blacklist = [
+        'gravatar.com',
+        'mapbox.com',
+        'okfn.org',
+        'googlecode.com'
+      ]
+    end
 
     page.driver.browser.manage.window.maximize if page.driver.browser.respond_to?(:manage)
   end