diff --git a/codebuild/release/validate.yml b/codebuild/release/validate.yml
index f86fcdc9c..35408ed98 100644
--- a/codebuild/release/validate.yml
+++ b/codebuild/release/validate.yml
@@ -8,8 +8,11 @@ phases:
       python: latest
   pre_build:
     commands:
+      - pyenv install 3.8.12
+      - pip install tox tox-pyenv
       - git clone https://github.com/aws-samples/busy-engineers-document-bucket.git
       - cd busy-engineers-document-bucket/exercises/python/encryption-context-complete
+      - pyenv local 3.8.12
       - sed -i "s/aws_encryption_sdk/aws_encryption_sdk==$VERSION/" requirements-dev.txt
   build:
     commands:
diff --git a/tox.ini b/tox.ini
index f6a293f0c..f5f340f3a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -318,7 +318,7 @@ commands =
 
 # Release tooling
 [testenv:park]
-basepython = python3.7
+basepython = python3
 skip_install = true
 deps =
     pypi-parker