test

python/base.yml

 variables:
   PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip"
 
+# we test all released and supported versions
+# https://devguide.python.org/versions/#supported-versions
 .python-versions:
   versions:
     - "3.8"
@@ -24,7 +26,4 @@ variables:
       - "*.log"
   parallel:
     matrix:
-      # we test all released and supported versions
-      # https://devguide.python.org/versions/#supported-versions
-      # - PYTHON_VERSIONS: ["3.8", "3.9", "3.10", "3.11"]
       - PYTHON_VERSIONS: !reference [.python-versions, versions]

test/python.yml

-# keep this in sync with python/base.yml
-.py_versions: &py_versions
-  - "3.8"
-  - "3.9"
-  - "3.10"
-  - "3.11"
-
 py_build:
   before_script:
     - !reference [.ci-setup, script]
@@ -29,7 +22,7 @@ py_tests:
     matrix:
       - PROJECT_ROOT: "test/python-template"
         EXIT_CODE: [0, 1]
-        PYTHON_VERSIONS: *py_versions
+        PYTHON_VERSIONS: !reference [.python-versions, versions]
   allow_failure:
     exit_codes: 1
 
@@ -42,4 +35,4 @@ py_lint:
     matrix:
       - PROJECT_ROOT: "test/python-template"
         EXIT_CODE: 0
-        PYTHON_VERSIONS: *py_versions
+        PYTHON_VERSIONS: !reference [.python-versions, versions]