diff --git a/.github/workflows/debug-artifacts.yml b/.github/workflows/debug-artifacts.yml
index 24c77acb2..145ce6f97 100644
--- a/.github/workflows/debug-artifacts.yml
+++ b/.github/workflows/debug-artifacts.yml
@@ -19,8 +19,31 @@ jobs:
   upload-artifacts:
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest]
-        version: [stable-20210308, stable-20210319, stable-20210809, cached, latest, nightly-latest]
+        include:
+          - os: ubuntu-20.04
+            version: stable-20210308
+          - os: macos-latest
+            version: stable-20210308
+          - os: ubuntu-20.04
+            version: stable-20210319
+          - os: macos-latest
+            version: stable-20210319
+          - os: ubuntu-20.04
+            version: stable-20210809
+          - os: macos-latest
+            version: stable-20210809
+          - os: ubuntu-latest
+            version: cached
+          - os: macos-latest
+            version: cached
+          - os: ubuntu-latest
+            version: latest
+          - os: macos-latest
+            version: latest
+          - os: ubuntu-latest
+            version: nightly-latest
+          - os: macos-latest
+            version: nightly-latest
     name: Upload debug artifacts
     timeout-minutes: 45
     runs-on: ${{ matrix.os }}
@@ -58,11 +81,15 @@ jobs:
       - name: Check expected artifacts exist
         shell: bash
         run: |
-          OPERATING_SYSTEMS="ubuntu-latest macos-latest"
           VERSIONS="stable-20210308 stable-20210319 stable-20210809 cached latest nightly-latest"
           LANGUAGES="cpp csharp go java javascript python"
-          for os in $OPERATING_SYSTEMS; do
-            for version in $VERSIONS; do
+          for version in $VERSIONS; do
+            if [[ "$version" =~ stable-(20210308|20210319|20210809) ]]; then
+              OPERATING_SYSTEMS="ubuntu-20.04 macos-latest"
+            else
+              OPERATING_SYSTEMS="ubuntu-latest macos-latest"
+            fi
+            for os in $OPERATING_SYSTEMS; do
               pushd "./my-debug-artifacts-$os-$version"
               echo "Artifacts from version $version on $os:"
               for language in $LANGUAGES; do
diff --git a/.github/workflows/python-deps.yml b/.github/workflows/python-deps.yml
index 9f43459da..eeb6d88ea 100644
--- a/.github/workflows/python-deps.yml
+++ b/.github/workflows/python-deps.yml
@@ -26,7 +26,7 @@ jobs:
     strategy:
         fail-fast: false
         matrix:
-          os: [ubuntu-latest, ubuntu-22.04, macos-latest]
+          os: [ubuntu-20.04, ubuntu-22.04, macos-latest]
           python_deps_type: [pipenv, poetry, requirements, setup_py]
           python_version: [2, 3]
           exclude:
@@ -65,7 +65,7 @@ jobs:
         cd $GITHUB_WORKSPACE/python-setup/tests/${PYTHON_DEPS_TYPE}/requests-${PYTHON_VERSION}
 
         case ${{ matrix.os }} in
-            ubuntu-latest*)     basePath="/opt";;
+            ubuntu-20.04*)     basePath="/opt";;
             ubuntu-22.04*)     basePath="/opt";;
             macos-latest*)    basePath="/Users/runner";;
         esac
@@ -90,7 +90,7 @@ jobs:
     strategy:
         fail-fast: false
         matrix:
-          os: [ubuntu-latest, ubuntu-22.04, macos-latest]
+          os: [ubuntu-20.04, ubuntu-22.04, macos-latest]
 
     steps:
     # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
@@ -112,7 +112,7 @@ jobs:
         cd $GITHUB_WORKSPACE/python-setup/tests/requirements/non-standard-location
 
         case ${{ matrix.os }} in
-            ubuntu-latest*)     basePath="/opt";;
+            ubuntu-20.04*)     basePath="/opt";;
             ubuntu-22.04*)     basePath="/opt";;
             macos-latest*)    basePath="/Users/runner";;
         esac
diff --git a/.github/workflows/unset-environment-new-cli.yml b/.github/workflows/unset-environment-new-cli.yml
index 39da1b36c..959a1663a 100644
--- a/.github/workflows/unset-environment-new-cli.yml
+++ b/.github/workflows/unset-environment-new-cli.yml
@@ -21,7 +21,7 @@ jobs:
     strategy:
       matrix:
         include:
-        - os: ubuntu-latest
+        - os: ubuntu-20.04
           version: stable-20210809
         - os: ubuntu-latest
           version: cached
diff --git a/.github/workflows/unset-environment-old-cli.yml b/.github/workflows/unset-environment-old-cli.yml
index 281ced054..30ec0dd1a 100644
--- a/.github/workflows/unset-environment-old-cli.yml
+++ b/.github/workflows/unset-environment-old-cli.yml
@@ -24,9 +24,9 @@ jobs:
     strategy:
       matrix:
         include:
-        - os: ubuntu-latest
+        - os: ubuntu-20.04
           version: stable-20210308
-        - os: ubuntu-latest
+        - os: ubuntu-20.04
           version: stable-20210319
     name: Test unsetting environment variables
     timeout-minutes: 45