diff --git a/.circleci/config.yml b/.circleci/config.yml
index 7eb9d4b..3f5f7e4 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -14,3 +14,4 @@ jobs:
                 key: cache-{{ .Branch }}-{{ checksum "Pipfile.lock" }}
                 paths:
                     - "/home/circleci/.local/share/virtualenvs"
+            - run: pipenv run test
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..9417eb6
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,132 @@
+
+# Created by https://www.gitignore.io/api/python
+
+### Python ###
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+.hypothesis/
+.pytest_cache/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+.python-version
+
+# celery beat schedule file
+celerybeat-schedule
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+### Python Patch ###
+.venv/
+
+### Python.VirtualEnv Stack ###
+# Virtualenv
+# http://iamzed.com/2009/05/07/a-primer-on-virtualenv/
+[Bb]in
+[Ii]nclude
+[Ll]ib
+[Ll]ib64
+[Ll]ocal
+pyvenv.cfg
+pip-selfcheck.json
+
+
+# End of https://www.gitignore.io/api/python
diff --git a/Pipfile b/Pipfile
index a79ed51..77e317b 100644
--- a/Pipfile
+++ b/Pipfile
@@ -9,9 +9,18 @@ github-webhook = "*"
 waitress = "*"
 
 [dev-packages]
+black = "*"
+isort = "*"
+mypy = "*"
+"flake8" = "*"
 
 [requires]
 python_version = "3.7"
 
 [scripts]
-start = "python3 server.py"
+start = "python3 app/server.py"
+test-fix = "bash ./scripts/test-fix.sh"
+test = "bash ./scripts/test.sh"
+
+[pipenv]
+allow_prereleases = true
diff --git a/Pipfile.lock b/Pipfile.lock
index e1caf8b..e6467ed 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "1eb29aa9673cd7d91dede603696d3e62320d46140c57acc70904b7a597d8b4a3"
+            "sha256": "683dc0a762a0d5cd59d704cb6fae259c6d16dbdae1754f102e5ba532f71df82e"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -82,5 +82,123 @@
             "version": "==0.14.1"
         }
     },
-    "develop": {}
+    "develop": {
+        "appdirs": {
+            "hashes": [
+                "sha256:9e5896d1372858f8dd3344faf4e5014d21849c756c8d5701f78f8a103b372d92",
+                "sha256:d8b24664561d0d34ddfaec54636d502d7cea6e29c3eaf68f3df6180863e2166e"
+            ],
+            "version": "==1.4.3"
+        },
+        "attrs": {
+            "hashes": [
+                "sha256:10cbf6e27dbce8c30807caf056c8eb50917e0eaafe86347671b57254006c3e69",
+                "sha256:ca4be454458f9dec299268d472aaa5a11f67a4ff70093396e1ceae9c76cf4bbb"
+            ],
+            "version": "==18.2.0"
+        },
+        "black": {
+            "hashes": [
+                "sha256:817243426042db1d36617910df579a54f1afd659adb96fc5032fcf4b36209739",
+                "sha256:e030a9a28f542debc08acceb273f228ac422798e5215ba2a791a6ddeaaca22a5"
+            ],
+            "index": "pypi",
+            "version": "==18.9b0"
+        },
+        "click": {
+            "hashes": [
+                "sha256:2335065e6395b9e67ca716de5f7526736bfa6ceead690adf616d925bdc622b13",
+                "sha256:5b94b49521f6456670fdb30cd82a4eca9412788a93fa6dd6df72c94d5a8ff2d7"
+            ],
+            "version": "==7.0"
+        },
+        "flake8": {
+            "hashes": [
+                "sha256:6a35f5b8761f45c5513e3405f110a86bea57982c3b75b766ce7b65217abe1670",
+                "sha256:c01f8a3963b3571a8e6bd7a4063359aff90749e160778e03817cd9b71c9e07d2"
+            ],
+            "index": "pypi",
+            "version": "==3.6.0"
+        },
+        "isort": {
+            "hashes": [
+                "sha256:1153601da39a25b14ddc54955dbbacbb6b2d19135386699e2ad58517953b34af",
+                "sha256:b9c40e9750f3d77e6e4d441d8b0266cf555e7cdabdcff33c4fd06366ca761ef8",
+                "sha256:ec9ef8f4a9bc6f71eec99e1806bfa2de401650d996c59330782b89a5555c1497"
+            ],
+            "index": "pypi",
+            "version": "==4.3.4"
+        },
+        "mccabe": {
+            "hashes": [
+                "sha256:ab8a6258860da4b6677da4bd2fe5dc2c659cff31b3ee4f7f5d64e79735b80d42",
+                "sha256:dd8d182285a0fe56bace7f45b5e7d1a6ebcbf524e8f3bd87eb0f125271b8831f"
+            ],
+            "version": "==0.6.1"
+        },
+        "mypy": {
+            "hashes": [
+                "sha256:8e071ec32cc226e948a34bbb3d196eb0fd96f3ac69b6843a5aff9bd4efa14455",
+                "sha256:fb90c804b84cfd8133d3ddfbd630252694d11ccc1eb0166a1b2efb5da37ecab2"
+            ],
+            "index": "pypi",
+            "version": "==0.641"
+        },
+        "mypy-extensions": {
+            "hashes": [
+                "sha256:37e0e956f41369209a3d5f34580150bcacfabaa57b33a15c0b25f4b5725e0812",
+                "sha256:b16cabe759f55e3409a7d231ebd2841378fb0c27a5d1994719e340e4f429ac3e"
+            ],
+            "version": "==0.4.1"
+        },
+        "pycodestyle": {
+            "hashes": [
+                "sha256:cbc619d09254895b0d12c2c691e237b2e91e9b2ecf5e84c26b35400f93dcfb83",
+                "sha256:cbfca99bd594a10f674d0cd97a3d802a1fdef635d4361e1a2658de47ed261e3a"
+            ],
+            "version": "==2.4.0"
+        },
+        "pyflakes": {
+            "hashes": [
+                "sha256:9a7662ec724d0120012f6e29d6248ae3727d821bba522a0e6b356eff19126a49",
+                "sha256:f661252913bc1dbe7fcfcbf0af0db3f42ab65aabd1a6ca68fe5d466bace94dae"
+            ],
+            "version": "==2.0.0"
+        },
+        "toml": {
+            "hashes": [
+                "sha256:229f81c57791a41d65e399fc06bf0848bab550a9dfd5ed66df18ce5f05e73d5c",
+                "sha256:235682dd292d5899d361a811df37e04a8828a5b1da3115886b73cf81ebc9100e"
+            ],
+            "version": "==0.10.0"
+        },
+        "typed-ast": {
+            "hashes": [
+                "sha256:0948004fa228ae071054f5208840a1e88747a357ec1101c17217bfe99b299d58",
+                "sha256:10703d3cec8dcd9eef5a630a04056bbc898abc19bac5691612acba7d1325b66d",
+                "sha256:1f6c4bd0bdc0f14246fd41262df7dfc018d65bb05f6e16390b7ea26ca454a291",
+                "sha256:25d8feefe27eb0303b73545416b13d108c6067b846b543738a25ff304824ed9a",
+                "sha256:29464a177d56e4e055b5f7b629935af7f49c196be47528cc94e0a7bf83fbc2b9",
+                "sha256:2e214b72168ea0275efd6c884b114ab42e316de3ffa125b267e732ed2abda892",
+                "sha256:3e0d5e48e3a23e9a4d1a9f698e32a542a4a288c871d33ed8df1b092a40f3a0f9",
+                "sha256:519425deca5c2b2bdac49f77b2c5625781abbaf9a809d727d3a5596b30bb4ded",
+                "sha256:57fe287f0cdd9ceaf69e7b71a2e94a24b5d268b35df251a88fef5cc241bf73aa",
+                "sha256:668d0cec391d9aed1c6a388b0d5b97cd22e6073eaa5fbaa6d2946603b4871efe",
+                "sha256:68ba70684990f59497680ff90d18e756a47bf4863c604098f10de9716b2c0bdd",
+                "sha256:6de012d2b166fe7a4cdf505eee3aaa12192f7ba365beeefaca4ec10e31241a85",
+                "sha256:79b91ebe5a28d349b6d0d323023350133e927b4de5b651a8aa2db69c761420c6",
+                "sha256:8550177fa5d4c1f09b5e5f524411c44633c80ec69b24e0e98906dd761941ca46",
+                "sha256:898f818399cafcdb93cbbe15fc83a33d05f18e29fb498ddc09b0214cdfc7cd51",
+                "sha256:94b091dc0f19291adcb279a108f5d38de2430411068b219f41b343c03b28fb1f",
+                "sha256:a26863198902cda15ab4503991e8cf1ca874219e0118cbf07c126bce7c4db129",
+                "sha256:a8034021801bc0440f2e027c354b4eafd95891b573e12ff0418dec385c76785c",
+                "sha256:bc978ac17468fe868ee589c795d06777f75496b1ed576d308002c8a5756fb9ea",
+                "sha256:c05b41bc1deade9f90ddc5d988fe506208019ebba9f2578c622516fd201f5863",
+                "sha256:c9b060bd1e5a26ab6e8267fd46fc9e02b54eb15fffb16d112d4c7b1c12987559",
+                "sha256:edb04bdd45bfd76c8292c4d9654568efaedf76fe78eb246dde69bdb13b2dad87",
+                "sha256:f19f2a4f547505fe9072e15f6f4ae714af51b5a681a97f187971f50c283193b6"
+            ],
+            "version": "==1.1.0"
+        }
+    }
 }
diff --git a/server.py b/app/server.py
similarity index 99%
rename from server.py
rename to app/server.py
index 4d6c62d..097a278 100644
--- a/server.py
+++ b/app/server.py
@@ -2,7 +2,6 @@
 from flask import Flask
 from github_webhook import Webhook
 
-
 app = Flask(__name__)
 webhook = Webhook(app)
 
diff --git a/scripts/test-fix.sh b/scripts/test-fix.sh
new file mode 100644
index 0000000..92835ca
--- /dev/null
+++ b/scripts/test-fix.sh
@@ -0,0 +1,7 @@
+#!/usr/bin/env python3
+
+set -e
+
+black app/
+
+isort -rc app/
diff --git a/scripts/test.sh b/scripts/test.sh
new file mode 100644
index 0000000..9c2f81a
--- /dev/null
+++ b/scripts/test.sh
@@ -0,0 +1,15 @@
+#!/usr/bin/env python3
+
+set -e
+
+echo "> Running black"
+black --check app/
+
+echo "> Running isort"
+isort -rc -c app/
+
+echo "> Running mypy"
+mypy --ignore-missing-imports app/
+
+echo "> Running flake8"
+flake8 --ignore=E128,E501 app