diff --git a/.github/workflows/selftest.yml b/.github/workflows/selftest.yml
index ef56600..6e768f1 100644
--- a/.github/workflows/selftest.yml
+++ b/.github/workflows/selftest.yml
@@ -13,5 +13,8 @@ jobs:
         uses: actions/setup-go@v2
         with:
           go-version: 1.16
+      - name: Checkout
+        uses: actions/checkout@v2
       - name: Run gotestfmt
-        run: cd testdata && go test -v ./... | gotestfmt
+        working-directory: testdata
+        run: go test -v ./... | gotestfmt