diff --git a/letsencrypt-nginx/tests/boulder-integration.conf.sh b/letsencrypt-nginx/tests/boulder-integration.conf.sh
index 12610d895..006d68836 100755
--- a/letsencrypt-nginx/tests/boulder-integration.conf.sh
+++ b/letsencrypt-nginx/tests/boulder-integration.conf.sh
@@ -20,6 +20,7 @@ events {
 }
 
 http {
+  server_names_hash_bucket_size 2048;
   # Set an array of temp and cache file options that will otherwise default to
   # restricted locations accessible only to root.
   client_body_temp_path $root/client_body;