diff --git a/.github/h2spec.config b/.github/h2spec.config
index 745a637e1..73a875197 100644
--- a/.github/h2spec.config
+++ b/.github/h2spec.config
@@ -20,8 +20,8 @@ defaults
 frontend h2
     mode http
     bind 127.0.0.1:8443 ssl crt reg-tests/ssl/common.pem alpn h2,http/1.1
-    default_backend h2
+    default_backend h2b
 
-backend h2
+backend h2b
     errorfile 200 .github/errorfile
     http-request deny deny_status 200