--- a/testing/web-platform/tests/tools/wptrun.py
+++ b/testing/web-platform/tests/tools/wptrun.py
@@ -76,17 +76,17 @@ your PATH.
 
 Otherwise run with --ssl-type=none""")
             else:
                 raise WptrunError("""OpenSSL not found. If you don't need HTTPS support run with --ssl-type=none,
 otherwise install OpenSSL and ensure that it's on your $PATH.""")
 
 
 def check_environ(product):
-    if product != "firefox":
+    if product not in ("firefox", "servo"):
         expected_hosts = ["web-platform.test",
                           "www.web-platform.test",
                           "www1.web-platform.test",
                           "www2.web-platform.test",
                           "xn--n8j6ds53lwwkrqhv28a.web-platform.test",
                           "xn--lve-6lad.web-platform.test",
                           "nonexistent-origin.web-platform.test"]
         missing_hosts = set(expected_hosts)