diff --git a/.circleci/config.yml b/.circleci/config.yml
index b518487..7069028 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -2,73 +2,76 @@
 #
 # Check https://circleci.com/docs/2.0/language-python/ for more details
 #
-version: 2
-jobs:
 
-    # using tox
-    toxify:
+# ------ WORKFLOW VERSION ------
+#version: 2
+#jobs:
+#
+#    # using tox
+#    toxify:
+#
+#        docker:
+#            - image: circleci/python:3.7
+#
+#        steps:
+#            - checkout
+#            # download and cache dependencies
+#            - restore_cache:
+#                keys:
+#                    - v1-dependencies-{{ checksum "requirements.txt" }}
+#                    # fallback to using the latest cache if no exact match is found
+#                    - v1-dependencies-
+#
+#            - run: pip install tox && tox
+#
+#workflows:
+#    version: 2
+#
+#    cvdata:
+#        jobs:
+#        - toxify
 
+# ------ NON-WORKFLOW VERSION ------
+jobs:
+    build:
         docker:
+            # specify the version you desire here
+            # CircleCI maintains a library of pre-built images
+            # documented at https://circleci.com/docs/2.0/circleci-images/
             - image: circleci/python:3.7
 
+        working_directory: ~/repo
+
         steps:
             - checkout
-            # download and cache dependencies
+
+            # Download and cache dependencies
             - restore_cache:
                 keys:
                     - v1-dependencies-{{ checksum "requirements.txt" }}
                     # fallback to using the latest cache if no exact match is found
                     - v1-dependencies-
 
-            - run: pip install tox && tox
+            - run:
+                name: install dependencies
+                command: |
+                    python3 -m venv venv
+                    . venv/bin/activate
+                    # pip install -e .
+                    pip install tox
 
-workflows:
-    version: 2
+            - save_cache:
+                paths:
+                    - ./venv
+                key: v1-dependencies-{{ checksum "requirements.txt" }}
 
-    cvdata:
-        jobs:
-        - toxify
+            # run tests with tox
+            - run:
+                name: run tests
+                command: |
+                . venv/bin/activate
+                tox
 
-#jobs:
-#  build:
-#    docker:
-#      # specify the version you desire here
-#      # CircleCI maintains a library of pre-built images
-#      # documented at https://circleci.com/docs/2.0/circleci-images/
-#      - image: circleci/python:3.7
-#
-#    working_directory: ~/repo
-#
-#    steps:
-#      - checkout
-#
-#      # Download and cache dependencies
-#      - restore_cache:
-#          keys:
-#            - v1-dependencies-{{ checksum "requirements.txt" }}
-#            # fallback to using the latest cache if no exact match is found
-#            - v1-dependencies-
-#
-#      - run:
-#          name: install dependencies
-#          command: |
-#            python3 -m venv venv
-#            . venv/bin/activate
-#            pip install -e .
-#            pip install tox
-#
-#      - save_cache:
-#          paths:
-#            - ./venv
-#          key: v1-dependencies-{{ checksum "requirements.txt" }}
-#
-#      # run tests with tox
-#      - run:
-#          name: run tests
-#          command: |
-#            . venv/bin/activate
-#            tox
-#
-#      - store_artifacts:
-#          path: test-reports
-#          destination: test-reports
+            - store_artifacts:
+                path: test-reports
+                destination: test-reports
diff --git a/tox.ini b/tox.ini
index 287bfae..2c52966 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,13 +13,14 @@ minversion = 3.3.0
 isolated_build = true
 
 [testenv]
+passenv = CI CIRCLECI CIRCLECI_*
 deps =
-    coverage
+    codecov
     opencv-python
     pytest
     scikit-image
 commands =
     python setup.py check -m -s
     py.test tests {posargs}
-    coverage
+    codecov