diff --git a/.circleci/config.yml b/.circleci/config.yml
index 587174d725..49a9bd7016 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1323,58 +1323,16 @@ workflows:
           cuda_version: cpu
           name: unittest_windows_cpu_py3.7
           python_version: '3.7'
-      - unittest_windows_cpu:
-          cuda_version: cpu
-          name: unittest_windows_cpu_py3.8
-          python_version: '3.8'
-      - unittest_windows_cpu:
-          cuda_version: cpu
-          name: unittest_windows_cpu_py3.9
-          python_version: '3.9'
-      - unittest_windows_cpu:
-          cuda_version: cpu
-          name: unittest_windows_cpu_py3.10
-          python_version: '3.10'
       - unittest_windows_gpu:
           cuda_version: cu113
           name: unittest_windows_gpu_py3.7
           python_version: '3.7'
-      - unittest_windows_gpu:
-          cuda_version: cu113
-          name: unittest_windows_gpu_py3.8
-          python_version: '3.8'
-      - unittest_windows_gpu:
-          cuda_version: cu113
-          name: unittest_windows_gpu_py3.9
-          python_version: '3.9'
-      - unittest_windows_gpu:
-          cuda_version: cu113
-          name: unittest_windows_gpu_py3.10
-          python_version: '3.10'
       - unittest_macos_cpu:
           cuda_version: cpu
           name: unittest_macos_cpu_py3.7
           python_version: '3.7'
           requires:
           - download_third_parties_nix
-      - unittest_macos_cpu:
-          cuda_version: cpu
-          name: unittest_macos_cpu_py3.8
-          python_version: '3.8'
-          requires:
-          - download_third_parties_nix
-      - unittest_macos_cpu:
-          cuda_version: cpu
-          name: unittest_macos_cpu_py3.9
-          python_version: '3.9'
-          requires:
-          - download_third_parties_nix
-      - unittest_macos_cpu:
-          cuda_version: cpu
-          name: unittest_macos_cpu_py3.10
-          python_version: '3.10'
-          requires:
-          - download_third_parties_nix
   nightly:
     jobs:
       - circleci_consistency:
diff --git a/.circleci/regenerate.py b/.circleci/regenerate.py
index e25cb5b7c3..86ed669fb5 100755
--- a/.circleci/regenerate.py
+++ b/.circleci/regenerate.py
@@ -210,6 +210,14 @@ def indent(indentation, data_list):
     return ("\n" + " " * indentation).join(yaml.dump(data_list).splitlines())
 
 
+def unittest_python_versions(os):
+    return {
+        "windows": PYTHON_VERSIONS[:1],
+        "macos": PYTHON_VERSIONS[:1],
+        "linux": PYTHON_VERSIONS,
+    }.get(os)
+
+
 def unittest_workflows(indentation=6):
     jobs = []
     jobs += build_download_job(None)
@@ -218,7 +226,7 @@ def unittest_workflows(indentation=6):
             if os_type == "macos" and device_type == "gpu":
                 continue
 
-            for i, python_version in enumerate(PYTHON_VERSIONS):
+            for i, python_version in enumerate(unittest_python_versions(os_type)):
                 job = {
                     "name": f"unittest_{os_type}_{device_type}_py{python_version}",
                     "python_version": python_version,