diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 7d99d8f..3b2d8ab 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -5,15 +5,6 @@ on: [push]
 jobs:
   build:
     runs-on: [advent-runners]
-    strategy:
-      matrix:
-        year:
-          - 2015
-          - 2017
-          - 2018
-          - 2020
-          - 2021
-          - 2022
 
     steps:
       - uses: actions/checkout@v3
@@ -28,4 +19,4 @@ jobs:
           poetry install
       - name: Unit tests
         run: |
-          poetry run pytest tests/test_${{ matrix.year }}*
+          poetry run pytest