diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 40e588197..0038cbb4a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -41,6 +41,9 @@ jobs:
       - uses: actions/setup-go@v2
         with:
           go-version: ${{ matrix.go }}
+      - name: Check go.mod Tidiness
+        run: go mod tidy && git diff --exit-code
+        if: ${{ matrix.go == "1.16" }}
       - name: Build
         run: go build ./...
       - name: Vet