diff --git a/.circleci/config.yml b/.circleci/config.yml
index 46e78de2..b878be12 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -59,7 +59,7 @@ jobs:
     #   This would typically be a build job when using workflows, possibly combined with build
     # This is based on your 1.0 configuration file or project settings
     - run: python ./setup.py develop && make check-3.6
-    - run: cd ./test/stdlib && bash ./runtests.sh 'test_[p-z]*.py'
+    - run: cd ./test/stdlib && pyenv local 3.6.9 && bash ./runtests.sh 'test_[p-z]*.py'
     # Teardown
     #   If you break your build into multiple jobs with workflows, you will probably want to do the parts of this that are relevant in each
     # Save test results