Debugging CI failures (round 2)

.circleci/config.yml

@@ -10,7 +10,7 @@ jobs:
       ignore:
         - gh-pages
     docker:
-      - image: googleapis/nox:0.17.0
+      - image: circleci/python:3.6.9
       - image: mysql:5.7
         environment:
           MYSQL_ROOT_HOST: "%"
@@ -27,21 +27,12 @@ jobs:
 
     steps:
       - checkout
-      - run:
-          name: Decrypt credentials
-          command: |
-            if [ -n "$GOOGLE_APPLICATION_CREDENTIALS" ]; then
-              openssl aes-256-cbc -d -a -k "$GOOGLE_CREDENTIALS_PASSPHRASE" \
-                  -in tests/system/credentials.json.enc \
-                  -out $GOOGLE_APPLICATION_CREDENTIALS
-            else
-              echo "No credentials. System tests will not run."
-            fi
       - run:
           name: Run tests - opencensus
           command: |
-            pip install --upgrade nox
-            nox -f noxfile.py
+            sudo pip install --upgrade nox
+            python -c "import sqlite3"
+            nox -f noxfile.py -s sqlite_check
       - deploy:
           name: Push to PyPI (if this is a release tag).
           command: scripts/twine_upload.sh

noxfile.py

@@ -85,6 +85,13 @@ def unit(session):
     )
 
 
+@nox.session(python=['3.5', '3.6'])
+def sqlite_check(session):
+    # _install_test_dependencies(session)
+    # _install_dev_packages(session)
+    session.run('python', '-c', 'import sqlite3')
+
+
 @nox.session(python=['2.7', '3.6'])
 def system(session):
     """Run the system test suite."""