diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 91e7cf87..b65c03b1 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -19,7 +19,7 @@ jobs:
         ruby:
           - 2.6
           - 2.7
-          - 3.0
+          - '3.0' # Due to https://github.com/actions/runner/issues/849, we have to use quotes for '3.0'
           - 3.1
           - jruby
           - truffleruby-21