diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 799d612..9da0390 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -30,4 +30,4 @@ jobs:
           poetry install
       - name: Unit tests
         run: |
-          poetry run pytest tests/test_{{ matrix.year }}*
+          poetry run pytest tests/test_${{ matrix.year }}*