diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 6691fe7..fb36ec7 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -14,6 +14,7 @@ jobs:
         - '1.18'
         - '1.19'
         - '1.20'
+        - '1.21'
     name: Go ${{ matrix.go }} test
     steps:
       - uses: actions/checkout@v2