diff --git a/.gitea/workflows/heavy_test.yaml b/.gitea/workflows/heavy_test.yaml
index f408dc4..e8c58c7 100644
--- a/.gitea/workflows/heavy_test.yaml
+++ b/.gitea/workflows/heavy_test.yaml
@@ -3,10 +3,11 @@ on: [push]
 
 jobs:
   parallel-builds:
-    runs-on: [linux, windows]
     strategy:
       matrix:
         task_id: [1, 2, 3, 4, 5, 6, 7, 8]
+        os_label: [linux, windows]
+    runs-on: ${{ matrix.os_label }}
     steps:
       - uses: actions/checkout@v4