diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index b9c5e80d..9311050a 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -44,7 +44,7 @@ jobs:
       fail-fast: false
       matrix:
         # https://ruby-lang.org/en/downloads/branches
-        ruby: ["3.3", "3.2", "3.1"]
+        ruby: ["3.3", "3.2"]
         # https://www.postgresql.org/support/versioning/
         pg: [12-master, 13-master, 14-master, 15-master, 16-master]
     steps: