diff --git a/cove_iati/tests_functional.py b/cove_iati/tests_functional.py
index fe777e50..ef9061fc 100644
--- a/cove_iati/tests_functional.py
+++ b/cove_iati/tests_functional.py
@@ -15,7 +15,7 @@ def browser(request):
     if BROWSER == 'ChromeHeadless':
         options = Options()
         options.add_argument("--headless")
-        options.add_argument("--remote-debugging-port=9222")
+        #options.add_argument("--remote-debugging-port=9222")
         browser = webdriver.Chrome(options=options)
     else:
         browser = getattr(webdriver, BROWSER)()