		`@@ -2,6 +2,7 @@`

		`import os`
		`import tempfile`
		`+ from typing import Optional, Tuple, Union`

		`from freshmaker.config import all_, any_ # noqa`

		`@@ -148,9 +149,9 @@`
		`# Path to credential cache file. This optional could be None when not using`
		`# a client keytab to acquire credential.`
		`KRB_AUTH_CCACHE_FILE = tempfile.mkstemp(`
		`- suffix=str(os.getpid()), prefix="freshmaker_cc_")`
		`+ suffix=str(os.getpid()), prefix="freshmaker_cc_") # type: Union[Tuple[int, str], Optional[str]]`

		`- # Select which authentication backend to work with. There are 3 choices`
		`+ # Select which authentication backend to work with. There are 3 choices Tuple[int, str]`
		`# noauth: no authentication is enabled. Useful for development particularly.`
		`# kerberos: Kerberos authentication is enabled.`
		`# openidc: OpenIDC authentication is enabled.`

		`@@ -26,6 +26,7 @@`
		`import pkg_resources`

		`from logging import getLogger`
		`+ from typing import Any`

		`from flask import Flask`
		`from flask_login import LoginManager`
		`@@ -40,12 +41,12 @@`
		`except pkg_resources.DistributionNotFound:`
		`version = 'unknown'`

		`- app = Flask(__name__)`
		`+ app = Flask(__name__) # type: Any`
		`app.wsgi_app = ReverseProxy(app.wsgi_app)`

		`conf = init_config(app)`

		`- db = SQLAlchemy(app)`
		`+ db = SQLAlchemy(app) # type: Any`

		`init_logging(conf)`
		`log = getLogger(__name__)`

		`@@ -29,7 +29,7 @@`
		`import os`
		`import threading`

		`- from os import sys`
		`+ from os import sys # type: ignore`
		`from freshmaker import logger`

		`@@ -22,6 +22,7 @@`
		`# Written by Jan Kaluza <jkaluza@redhat.com>`

		`import itertools`
		`+ from typing import Dict, Any`

		`from freshmaker import conf`
		`from freshmaker.types import ArtifactType`
		`@@ -31,7 +32,7 @@`

		`class BaseEvent(object):`

		`- _parsers = {}`
		`+ _parsers = {} # type: Dict[Any, Any]`

		`def __init__(self, msg_id, manual=False, dry_run=False):`
		`"""`

		`@@ -22,6 +22,7 @@`
		`# Written by Jan Kaluza <jkaluza@redhat.com>`

		`import abc`
		`+ from typing import List`


		`class BaseParser(object):`
		`@@ -30,7 +31,7 @@`
		`"""`
		`__metaclass__ = abc.ABCMeta`
		`name = "abstract_parser"`
		`- topic_suffixes = []`
		`+ topic_suffixes = [] # type: List[str]`

		`@abc.abstractmethod`
		`def can_parse(self, topic, msg):`

		`@@ -5,6 +5,7 @@`
		`pytest-cov`
		`vcrpy`
		`tox`
		`+ mypy`
		`# It seems like Flask needs this itsdangerous package.`
		`# But there's a bug in a previous version:`
		`# https://github.com/pallets/itsdangerous/issues/102`

		`@@ -4,7 +4,7 @@`
		`# and then run "tox" from this directory.`

		`[tox]`
		`- envlist = py37, flake8, bandit`
		`+ envlist = py37, flake8, bandit, mypy`

		`[testenv]`
		`basepython = python3`
		`@@ -27,6 +27,13 @@`
		`deps = flake8`
		`commands = flake8`

		`+ [testenv:mypy]`
		`+ description = type check`
		`+ deps =`
		`+ mypy`
		`+ commands =`
		`+ mypy --ignore-missing-imports .`
		`+`
		`[testenv:bandit]`
		`basepython = python3`
		`skip_install = true`