diff --git a/.circleci/config.yml b/.circleci/config.yml
index ba8c75f4f3..06ebfcf63a 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -158,8 +158,8 @@ jobs:
             - /tmp/ds005/derivatives/freesurfer
 
   test_pytest:
-    machine:
-      image: circleci/classic:201711-01
+    docker:
+      - image: circleci/python:latest
     working_directory: /home/circleci/src/smriprep
     steps:
       - checkout
@@ -173,8 +173,7 @@ jobs:
       - run:
           name: Setup Python environment
           command: |
-            pyenv global 3.5.2
-            pip install --upgrade "setuptools>=30.3.0" "pip>=18.1" twine docutils
+            pip install --user --upgrade "setuptools>=30.3.0" "pip>=18.1" twine docutils
       - run:
           name: Check PyPi preconditions
           command: |
@@ -183,7 +182,7 @@ jobs:
       - run:
           name: Install sMRIPrep
           no_output_timeout: 30m
-          command: pip install ".[test]"
+          command: pip install --user ".[test]"
       - run:
           name: Run sMRIPrep tests
           no_output_timeout: 2h