diff --git a/.github/workflows/modified_scripts_build.yml b/.github/workflows/modified_scripts_build.yml
index a9cd75a8..b9e24c71 100644
--- a/.github/workflows/modified_scripts_build.yml
+++ b/.github/workflows/modified_scripts_build.yml
@@ -157,7 +157,7 @@ jobs:
       fail-fast: false
       matrix:
         python-version: ${{fromJson(needs.discover_modified_scripts.outputs.versions)}}
-        os: ["ubuntu-20.04", "ubuntu-22.04", "ubuntu-24.04"]
+        os: ["ubuntu-22.04", "ubuntu-24.04"]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
@@ -215,7 +215,7 @@ jobs:
       fail-fast: false
       matrix:
         python-version: ${{fromJson(needs.discover_modified_scripts.outputs.versions_cpython_only)}}
-        os: ["ubuntu-20.04", "ubuntu-22.04", "ubuntu-24.04"]
+        os: ["ubuntu-latest"]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
diff --git a/.github/workflows/pyenv_tests.yml b/.github/workflows/pyenv_tests.yml
index 8cead600..dab75608 100644
--- a/.github/workflows/pyenv_tests.yml
+++ b/.github/workflows/pyenv_tests.yml
@@ -12,7 +12,6 @@ jobs:
         os:
           - ubuntu-24.04
           - ubuntu-22.04
-          - ubuntu-20.04
           - macos-14
           - macos-13
     runs-on: ${{ matrix.os }}