diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 139a136d6..d876810c2 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,9 +9,9 @@ jobs:
       matrix:
         os: [ 'ubuntu-latest', 'macos-latest', 'windows-latest' ]
         ruby: [ 2.6, 2.5, 2.4, 2.3, 2.2, jruby, jruby-head, truffleruby, ruby-head ]
-      exclude:
-        - os: windows-latest
-          ruby: truffleruby
+        exclude:
+          - os: windows-latest
+            ruby: truffleruby
     steps:
     - uses: actions/checkout@v2
     - uses: ruby/setup-ruby@v1