diff --git a/dev/breeze/tests/test_shell_params.py b/dev/breeze/tests/test_shell_params.py
index e4eeb409d4f19..dbcd085ae56d1 100644
--- a/dev/breeze/tests/test_shell_params.py
+++ b/dev/breeze/tests/test_shell_params.py
@@ -33,7 +33,7 @@
     [
         pytest.param(
             {},
-            {"python": 3.12},
+            {"python": "3.12"},
             {
                 "DEFAULT_BRANCH": AIRFLOW_BRANCH,
                 "AIRFLOW_CI_IMAGE": f"ghcr.io/apache/airflow/{AIRFLOW_BRANCH}/ci/python3.12",
@@ -43,7 +43,7 @@
         ),
         pytest.param(
             {},
-            {"python": 3.9},
+            {"python": "3.9"},
             {
                 "AIRFLOW_CI_IMAGE": f"ghcr.io/apache/airflow/{AIRFLOW_BRANCH}/ci/python3.9",
                 "PYTHON_MAJOR_MINOR_VERSION": "3.9",