diff --git a/ietf/settings_testcrawl.py b/ietf/settings_testcrawl.py
index 36533014f..967e3f5b7 100644
--- a/ietf/settings_testcrawl.py
+++ b/ietf/settings_testcrawl.py
@@ -35,6 +35,7 @@ CACHES = {
 
 PASSWORD_HASHERS = ( 'django.contrib.auth.hashers.MD5PasswordHasher', )
 SERVER_MODE = 'test'
+ALLOWED_HOSTS = ["127.0.0.1", "localhost:8000", "testserver", ]
 
 SILENCED_SYSTEM_CHECKS = [
     "fields.W342",  # Setting unique=True on a ForeignKey has the same effect as using a OneToOneField.