diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
index 0d7c00e016..8985df4475 100644
--- a/.github/workflows/unit-tests.yml
+++ b/.github/workflows/unit-tests.yml
@@ -12,7 +12,7 @@ jobs:
   run:
     strategy:
       matrix:
-        os: [ubuntu-latest]
+        os: [ubuntu-20.04]
         python-version: ["3.12", "3.11", "3.10"]
 
     runs-on: ${{ matrix.os }}