diff --git a/config/external.yaml b/config/external.yaml
index 676b698a..994eb6cd 100644
--- a/config/external.yaml
+++ b/config/external.yaml
@@ -11,13 +11,8 @@ async:
   command: bundle exec sus
   extra:
     - $LOAD_PATH << ::File.expand_path("../../ext", __dir__)
-async-io:
-  url: https://github.com/socketry/async-io
-  command: bundle exec rspec
-  extra:
-    - $LOAD_PATH << ::File.expand_path("../../ext", __dir__)
 async-http:
   url: https://github.com/socketry/async-http
-  command: bundle exec rspec
+  command: bundle exec sus
   extra:
     - $LOAD_PATH << ::File.expand_path("../../ext", __dir__)