diff --git a/.circleci/config.yml b/.circleci/config.yml
index b769876..d5b5267 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1,21 +1,54 @@
 version: 2
 jobs:
-  test:
+  test-3.6:
+    docker:
+      - image: python:3.6
+    working_directory: ~/spleeter
+    steps:
+      - checkout
+      - restore_cache:
+          keys:
+            - python-3.6-cache-{{ checksum requirements.txt }}
+            - python-3.6-cache-
+      - run:
+          name: install ffmpeg
+          command: apt-get update && apt-get install -y ffmpeg
+      - run:
+          name: install python dependencies
+          command: pip install -r requirements.txt && pip install pytest
+      - save_cache:
+          key: python-3.6-cache-{{ checksum requirements.txt }}
+          paths:
+            - "/usr/local/bin"
+            - "/usr/local/lib/python3.6/site-packages"
+      - run:
+          name: pytest
+          command: pytest -W ignore::FutureWarning -W ignore::DeprecationWarning
+  test-3.7:
     docker:
       - image: python:3.7
     working_directory: ~/spleeter
     steps:
       - checkout
+      - restore_cache:
+          keys:
+            - python-3.7-cache-{{ checksum requirements.txt }}
+            - python-3.7-cache-
       - run:
           name: install ffmpeg
           command: apt-get update && apt-get install -y ffmpeg
       - run:
-          name: install spleeter
-          command: pip install .
+          name: install python dependencies
+          command: pip install -r requirements.txt && pip install pytest
+      - save_cache:
+          key: python-3.7-cache-{{ checksum requirements.txt }}
+          paths:
+            - "/usr/local/bin"
+            - "/usr/local/lib/python3.7/site-packages"
       - run:
-          name: test separation
-          command: spleeter separate -i audio_example.mp3 -o .
-  upload:
+          name: pytest
+          command: pytest -W ignore::FutureWarning -W ignore::DeprecationWarning
+  pypi-deploy:
     docker:
       - image: python:3
     steps:
@@ -30,11 +63,13 @@ workflows:
   version: 2
   test-and-deploy:
     jobs:
-      - test
-      - upload:
+      - test-3.6
+      - test-3.7
+      - pypi-deploy:
           filters:
             branches:
               only:
                 - master
           requires:
-            - test
\ No newline at end of file
+            - test-3.6
+            - test-3.7
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..8e1f7be
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,7 @@
+importlib_resources; python_version<'3.7'
+requests
+setuptools>=41.0.0
+pandas==0.25.1
+tensorflow==1.14.0
+ffmpeg-python
+norbert==0.2.1
\ No newline at end of file