diff --git a/.fixtures.yml b/.fixtures.yml
index 96cfbd9..c6715df 100644
--- a/.fixtures.yml
+++ b/.fixtures.yml
@@ -2,9 +2,7 @@ fixtures:
   repositories:
     stdlib:
       repo: https://github.com/puppetlabs/puppetlabs-stdlib.git
-      ref: 4.13.1
     concat:
       repo: https://github.com/puppetlabs/puppetlabs-concat.git
-      ref: v7.3.0
   symlinks:
     limits: "#{source_dir}"