diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 86a8e27..5dbc2d7 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -24,6 +24,8 @@ jobs:
           - ruby: mingw
             os: windows-latest
         exclude:
+          - ruby: 2.5
+            os: macos-latest
           - ruby: head
             os: windows-latest
           - ruby: truffleruby-head