diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 0000000..57f64ce
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,32 @@
+defaults: &defaults
+  working_directory: ~/sublime_ansible_vault
+  docker:
+    - image: circleci/python:3.4
+
+version: 2
+jobs:
+  test:
+    << : *defaults
+    steps:
+      - checkout
+      - run:
+          name: install pipenv
+          command: pip install pipenv
+      - run:
+          name: install dependencies
+          command: |
+            pipenv install
+            pipenv install --dev
+      - run:
+          name: run tests
+          command: pipenv run tox
+      - store_artifacts:
+          path: pytest
+      - store_test_results:
+          path: pytest
+
+workflows:
+  version: 2
+  test:
+    jobs:
+      - test
diff --git a/.coveragerc b/.coveragerc
new file mode 100644
index 0000000..b47d2b9
--- /dev/null
+++ b/.coveragerc
@@ -0,0 +1,5 @@
+[run]
+omit =
+    */__main__.py
+    tests/*
+    __init__.py
diff --git a/.gitignore b/.gitignore
index 1dbc687..8d9f741 100644
--- a/.gitignore
+++ b/.gitignore
@@ -44,6 +44,7 @@ nosetests.xml
 coverage.xml
 *,cover
 .hypothesis/
+pytest/
 
 # Translations
 *.mo
diff --git a/.python-version b/.python-version
new file mode 100644
index 0000000..6cb9d3d
--- /dev/null
+++ b/.python-version
@@ -0,0 +1 @@
+3.4.3
diff --git a/Pipfile b/Pipfile
new file mode 100644
index 0000000..3a4ade7
--- /dev/null
+++ b/Pipfile
@@ -0,0 +1,19 @@
+[[source]]
+name = "pypi"
+url = "https://pypi.org/simple"
+verify_ssl = true
+
+[dev-packages]
+tox = "*"
+flake8 = "*"
+pytest = "*"
+pytest-cov = "*"
+pytest-sugar = "*"
+pydocstyle = "*"
+codecov = "*"
+
+[packages]
+ansible = "==2.2.3"
+
+[requires]
+python_version = "3.4"
diff --git a/Pipfile.lock b/Pipfile.lock
new file mode 100644
index 0000000..869530b
--- /dev/null
+++ b/Pipfile.lock
@@ -0,0 +1,521 @@
+{
+    "_meta": {
+        "hash": {
+            "sha256": "a15b75a812cfcc1d563a98c2632e3058b90da01195a60962dd0a91daf96a7027"
+        },
+        "pipfile-spec": 6,
+        "requires": {
+            "python_version": "3.4"
+        },
+        "sources": [
+            {
+                "name": "pypi",
+                "url": "https://pypi.org/simple",
+                "verify_ssl": true
+            }
+        ]
+    },
+    "default": {
+        "ansible": {
+            "hashes": [
+                "sha256:de18ab1cf0712252e928dd1226b2c058d5345ef7377a01e0601a268fcd512a90"
+            ],
+            "index": "pypi",
+            "version": "==2.2.3"
+        },
+        "asn1crypto": {
+            "hashes": [
+                "sha256:2f1adbb7546ed199e3c90ef23ec95c5cf3585bac7d11fb7eb562a3fe89c64e87",
+                "sha256:9d5c20441baf0cb60a4ac34cc447c6c189024b6b4c6cd7877034f4965c464e49"
+            ],
+            "version": "==0.24.0"
+        },
+        "bcrypt": {
+            "hashes": [
+                "sha256:01477981abf74e306e8ee31629a940a5e9138de000c6b0898f7f850461c4a0a5",
+                "sha256:054d6e0acaea429e6da3613fcd12d05ee29a531794d96f6ab959f29a39f33391",
+                "sha256:0872eeecdf9a429c1420158500eedb323a132bc5bf3339475151c52414729e70",
+                "sha256:09a3b8c258b815eadb611bad04ca15ec77d86aa9ce56070e1af0d5932f17642a",
+                "sha256:0f317e4ffbdd15c3c0f8ab5fbd86aa9aabc7bea18b5cc5951b456fe39e9f738c",
+                "sha256:2788c32673a2ad0062bea850ab73cffc0dba874db10d7a3682b6f2f280553f20",
+                "sha256:321d4d48be25b8d77594d8324c0585c80ae91ac214f62db9098734e5e7fb280f",
+                "sha256:346d6f84ff0b493dbc90c6b77136df83e81f903f0b95525ee80e5e6d5e4eef84",
+                "sha256:34dd60b90b0f6de94a89e71fcd19913a30e83091c8468d0923a93a0cccbfbbff",
+                "sha256:3b4c23300c4eded8895442c003ae9b14328ae69309ac5867e7530de8bdd7875d",
+                "sha256:43d1960e7db14042319c46925892d5fa99b08ff21d57482e6f5328a1aca03588",
+                "sha256:49e96267cd9be55a349fd74f9852eb9ae2c427cd7f6455d0f1765d7332292832",
+                "sha256:63e06ffdaf4054a89757a3a1ab07f1b922daf911743114a54f7c561b9e1baa58",
+                "sha256:67ed1a374c9155ec0840214ce804616de49c3df9c5bc66740687c1c9b1cd9e8d",
+                "sha256:6b662a5669186439f4f583636c8d6ea77cf92f7cfe6aae8d22edf16c36840574",
+                "sha256:6efd9ca20aefbaf2e7e6817a2c6ed4a50ff6900fafdea1bcb1d0e9471743b144",
+                "sha256:8569844a5d8e1fdde4d7712a05ab2e6061343ac34af6e7e3d7935b2bd1907bfd",
+                "sha256:8629ea6a8a59f865add1d6a87464c3c676e60101b8d16ef404d0a031424a8491",
+                "sha256:988cac675e25133d01a78f2286189c1f01974470817a33eaf4cfee573cfb72a5",
+                "sha256:9a6fedda73aba1568962f7543a1f586051c54febbc74e87769bad6a4b8587c39",
+                "sha256:9eced8962ce3b7124fe20fd358cf8c7470706437fa064b9874f849ad4c5866fc",
+                "sha256:a005ed6163490988711ff732386b08effcbf8df62ae93dd1e5bda0714fad8afb",
+                "sha256:ae35dbcb6b011af6c840893b32399252d81ff57d52c13e12422e16b5fea1d0fb",
+                "sha256:b1e8491c6740f21b37cca77bc64677696a3fb9f32360794d57fa8477b7329eda",
+                "sha256:c906bdb482162e9ef48eea9f8c0d967acceb5c84f2d25574c7d2a58d04861df1",
+                "sha256:cb18ffdc861dbb244f14be32c47ab69604d0aca415bee53485fcea4f8e93d5ef",
+                "sha256:cc2f24dc1c6c88c56248e93f28d439ee4018338567b0bbb490ea26a381a29b1e",
+                "sha256:d860c7fff18d49e20339fc6dffc2d485635e36d4b2cccf58f45db815b64100b4",
+                "sha256:d86da365dda59010ba0d1ac45aa78390f56bf7f992e65f70b3b081d5e5257b09",
+                "sha256:e22f0997622e1ceec834fd25947dc2ee2962c2133ea693d61805bc867abaf7ea",
+                "sha256:f2fe545d27a619a552396533cddf70d83cecd880a611cdfdbb87ca6aec52f66b",
+                "sha256:f425e925485b3be48051f913dbe17e08e8c48588fdf44a26b8b14067041c0da6",
+                "sha256:f7fd3ed3745fe6e81e28dc3b3d76cce31525a91f32a387e1febd6b982caf8cdb",
+                "sha256:f9210820ee4818d84658ed7df16a7f30c9fba7d8b139959950acef91745cc0f7"
+            ],
+            "version": "==3.1.4"
+        },
+        "cffi": {
+            "hashes": [
+                "sha256:151b7eefd035c56b2b2e1eb9963c90c6302dc15fbd8c1c0a83a163ff2c7d7743",
+                "sha256:1553d1e99f035ace1c0544050622b7bc963374a00c467edafac50ad7bd276aef",
+                "sha256:1b0493c091a1898f1136e3f4f991a784437fac3673780ff9de3bcf46c80b6b50",
+                "sha256:2ba8a45822b7aee805ab49abfe7eec16b90587f7f26df20c71dd89e45a97076f",
+                "sha256:3bb6bd7266598f318063e584378b8e27c67de998a43362e8fce664c54ee52d30",
+                "sha256:3c85641778460581c42924384f5e68076d724ceac0f267d66c757f7535069c93",
+                "sha256:3eb6434197633b7748cea30bf0ba9f66727cdce45117a712b29a443943733257",
+                "sha256:495c5c2d43bf6cebe0178eb3e88f9c4aa48d8934aa6e3cddb865c058da76756b",
+                "sha256:4c91af6e967c2015729d3e69c2e51d92f9898c330d6a851bf8f121236f3defd3",
+                "sha256:57b2533356cb2d8fac1555815929f7f5f14d68ac77b085d2326b571310f34f6e",
+                "sha256:770f3782b31f50b68627e22f91cb182c48c47c02eb405fd689472aa7b7aa16dc",
+                "sha256:79f9b6f7c46ae1f8ded75f68cf8ad50e5729ed4d590c74840471fc2823457d04",
+                "sha256:7a33145e04d44ce95bcd71e522b478d282ad0eafaf34fe1ec5bbd73e662f22b6",
+                "sha256:857959354ae3a6fa3da6651b966d13b0a8bed6bbc87a0de7b38a549db1d2a359",
+                "sha256:87f37fe5130574ff76c17cab61e7d2538a16f843bb7bca8ebbc4b12de3078596",
+                "sha256:95d5251e4b5ca00061f9d9f3d6fe537247e145a8524ae9fd30a2f8fbce993b5b",
+                "sha256:9d1d3e63a4afdc29bd76ce6aa9d58c771cd1599fbba8cf5057e7860b203710dd",
+                "sha256:a36c5c154f9d42ec176e6e620cb0dd275744aa1d804786a71ac37dc3661a5e95",
+                "sha256:a6a5cb8809091ec9ac03edde9304b3ad82ad4466333432b16d78ef40e0cce0d5",
+                "sha256:ae5e35a2c189d397b91034642cb0eab0e346f776ec2eb44a49a459e6615d6e2e",
+                "sha256:b0f7d4a3df8f06cf49f9f121bead236e328074de6449866515cea4907bbc63d6",
+                "sha256:b75110fb114fa366b29a027d0c9be3709579602ae111ff61674d28c93606acca",
+                "sha256:ba5e697569f84b13640c9e193170e89c13c6244c24400fc57e88724ef610cd31",
+                "sha256:be2a9b390f77fd7676d80bc3cdc4f8edb940d8c198ed2d8c0be1319018c778e1",
+                "sha256:ca1bd81f40adc59011f58159e4aa6445fc585a32bb8ac9badf7a2c1aa23822f2",
+                "sha256:d5d8555d9bfc3f02385c1c37e9f998e2011f0db4f90e250e5bc0c0a85a813085",
+                "sha256:e55e22ac0a30023426564b1059b035973ec82186ddddbac867078435801c7801",
+                "sha256:e90f17980e6ab0f3c2f3730e56d1fe9bcba1891eeea58966e89d352492cc74f4",
+                "sha256:ecbb7b01409e9b782df5ded849c178a0aa7c906cf8c5a67368047daab282b184",
+                "sha256:ed01918d545a38998bfa5902c7c00e0fee90e957ce036a4000a88e3fe2264917",
+                "sha256:edabd457cd23a02965166026fd9bfd196f4324fe6032e866d0f3bd0301cd486f",
+                "sha256:fdf1c1dc5bafc32bc5d08b054f94d659422b05aba244d6be4ddc1c72d9aa70fb"
+            ],
+            "version": "==1.11.5"
+        },
+        "cryptography": {
+            "hashes": [
+                "sha256:05a6052c6a9f17ff78ba78f8e6eb1d777d25db3b763343a1ae89a7a8670386dd",
+                "sha256:0eb83a24c650a36f68e31a6d0a70f7ad9c358fa2506dc7b683398b92e354a038",
+                "sha256:0ff4a3d6ea86aa0c9e06e92a9f986de7ee8231f36c4da1b31c61a7e692ef3378",
+                "sha256:1699f3e916981df32afdd014fb3164db28cdb61c757029f502cb0a8c29b2fdb3",
+                "sha256:1b1f136d74f411f587b07c076149c4436a169dc19532e587460d9ced24adcc13",
+                "sha256:21e63dd20f5e5455e8b34179ac43d95b3fb1ffa54d071fd2ed5d67da82cfe6dc",
+                "sha256:2454ada8209bbde97065453a6ca488884bbb263e623d35ba183821317a58b46f",
+                "sha256:3cdc5f7ca057b2214ce4569e01b0f368b3de9d8ee01887557755ccd1c15d9427",
+                "sha256:418e7a5ec02a7056d3a4f0c0e7ea81df374205f25f4720bb0e84189aa5fd2515",
+                "sha256:471a097076a7c4ab85561d7fa9a1239bd2ae1f9fd0047520f13d8b340bf3210b",
+                "sha256:5ecaf9e7db3ca582c6de6229525d35db8a4e59dc3e8a40a331674ed90e658cbf",
+                "sha256:63b064a074f8dc61be81449796e2c3f4e308b6eba04a241a5c9f2d05e882c681",
+                "sha256:6afe324dfe6074822ccd56d80420df750e19ac30a4e56c925746c735cf22ae8b",
+                "sha256:70596e90398574b77929cd87e1ac6e43edd0e29ba01e1365fed9c26bde295aa5",
+                "sha256:70c2b04e905d3f72e2ba12c58a590817128dfca08949173faa19a42c824efa0b",
+                "sha256:8908f1db90be48b060888e9c96a0dee9d842765ce9594ff6a23da61086116bb6",
+                "sha256:af12dfc9874ac27ebe57fc28c8df0e8afa11f2a1025566476b0d50cdb8884f70",
+                "sha256:b4fc04326b2d259ddd59ed8ea20405d2e695486ab4c5e1e49b025c484845206e",
+                "sha256:da5b5dda4aa0d5e2b758cc8dfc67f8d4212e88ea9caad5f61ba132f948bab859"
+            ],
+            "version": "==2.4.2"
+        },
+        "idna": {
+            "hashes": [
+                "sha256:c357b3f628cf53ae2c4c05627ecc484553142ca23264e593d327bcde5e9c3407",
+                "sha256:ea8b7f6188e6fa117537c3df7da9fc686d485087abf6ac197f9c46432f7e4a3c"
+            ],
+            "version": "==2.8"
+        },
+        "jinja2": {
+            "hashes": [
+                "sha256:74c935a1b8bb9a3947c50a54766a969d4846290e1e788ea44c1392163723c3bd",
+                "sha256:f84be1bb0040caca4cea721fcbbbbd61f9be9464ca236387158b0feea01914a4"
+            ],
+            "version": "==2.10"
+        },
+        "markupsafe": {
+            "hashes": [
+                "sha256:048ef924c1623740e70204aa7143ec592504045ae4429b59c30054cb31e3c432",
+                "sha256:130f844e7f5bdd8e9f3f42e7102ef1d49b2e6fdf0d7526df3f87281a532d8c8b",
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+                "sha256:31cbb1359e8c25f9f48e156e59e2eaad51cd5242c05ed18a8de6dbe85184e4b7",
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+                "sha256:4e97332c9ce444b0c2c38dd22ddc61c743eb208d916e4265a2a3b575bdccb1d3",
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+                "sha256:52b07fbc32032c21ad4ab060fec137b76eb804c4b9a1c7c7dc562549306afad2",
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+                "sha256:5c3fbebd7de20ce93103cb3183b47671f2885307df4a17a0ad56a1dd51273d36",
+                "sha256:5e5851969aea17660e55f6a3be00037a25b96a9b44d2083651812c99d53b14d1",
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+                "sha256:7d263e5770efddf465a9e31b78362d84d015cc894ca2c131901a4445eaa61ee1",
+                "sha256:83381342bfc22b3c8c06f2dd93a505413888694302de25add756254beee8449c",
+                "sha256:857eebb2c1dc60e4219ec8e98dfa19553dae33608237e107db9c6078b1167856",
+                "sha256:98e439297f78fca3a6169fd330fbe88d78b3bb72f967ad9961bcac0d7fdd1550",
+                "sha256:bf54103892a83c64db58125b3f2a43df6d2cb2d28889f14c78519394feb41492",
+                "sha256:d9ac82be533394d341b41d78aca7ed0e0f4ba5a2231602e2f05aa87f25c51672",
+                "sha256:e982fe07ede9fada6ff6705af70514a52beb1b2c3d25d4e873e82114cf3c5401",
+                "sha256:edce2ea7f3dfc981c4ddc97add8a61381d9642dc3273737e756517cc03e84dd6",
+                "sha256:efdc45ef1afc238db84cb4963aa689c0408912a0239b0721cb172b4016eb31d6",
+                "sha256:f137c02498f8b935892d5c0172560d7ab54bc45039de8805075e19079c639a9c",
+                "sha256:f82e347a72f955b7017a39708a3667f106e6ad4d10b25f237396a7115d8ed5fd",
+                "sha256:fb7c206e01ad85ce57feeaaa0bf784b97fa3cad0d4a5737bc5295785f5c613a1"
+            ],
+            "version": "==1.1.0"
+        },
+        "paramiko": {
+            "hashes": [
+                "sha256:3c16b2bfb4c0d810b24c40155dbfd113c0521e7e6ee593d704e84b4c658a1f3b",
+                "sha256:a8975a7df3560c9f1e2b43dc54ebd40fd00a7017392ca5445ce7df409f900fcb"
+            ],
+            "version": "==2.4.2"
+        },
+        "pyasn1": {
+            "hashes": [
+                "sha256:b9d3abc5031e61927c82d4d96c1cec1e55676c1a991623cfed28faea73cdd7ca",
+                "sha256:f58f2a3d12fd754aa123e9fa74fb7345333000a035f3921dbdaa08597aa53137"
+            ],
+            "version": "==0.4.4"
+        },
+        "pycparser": {
+            "hashes": [
+                "sha256:a988718abfad80b6b157acce7bf130a30876d27603738ac39f140993246b25b3"
+            ],
+            "version": "==2.19"
+        },
+        "pycrypto": {
+            "hashes": [
+                "sha256:f2ce1e989b272cfcb677616763e0a2e7ec659effa67a88aa92b3a65528f60a3c"
+            ],
+            "version": "==2.6.1"
+        },
+        "pynacl": {
+            "hashes": [
+                "sha256:05c26f93964373fc0abe332676cb6735f0ecad27711035b9472751faa8521255",
+                "sha256:0c6100edd16fefd1557da078c7a31e7b7d7a52ce39fdca2bec29d4f7b6e7600c",
+                "sha256:0d0a8171a68edf51add1e73d2159c4bc19fc0718e79dec51166e940856c2f28e",
+                "sha256:1c780712b206317a746ace34c209b8c29dbfd841dfbc02aa27f2084dd3db77ae",
+                "sha256:2424c8b9f41aa65bbdbd7a64e73a7450ebb4aa9ddedc6a081e7afcc4c97f7621",
+                "sha256:2d23c04e8d709444220557ae48ed01f3f1086439f12dbf11976e849a4926db56",
+                "sha256:30f36a9c70450c7878053fa1344aca0145fd47d845270b43a7ee9192a051bf39",
+                "sha256:37aa336a317209f1bb099ad177fef0da45be36a2aa664507c5d72015f956c310",
+                "sha256:4943decfc5b905748f0756fdd99d4f9498d7064815c4cf3643820c9028b711d1",
+                "sha256:57ef38a65056e7800859e5ba9e6091053cd06e1038983016effaffe0efcd594a",
+                "sha256:5bd61e9b44c543016ce1f6aef48606280e45f892a928ca7068fba30021e9b786",
+                "sha256:6482d3017a0c0327a49dddc8bd1074cc730d45db2ccb09c3bac1f8f32d1eb61b",
+                "sha256:7d3ce02c0784b7cbcc771a2da6ea51f87e8716004512493a2b69016326301c3b",
+                "sha256:a14e499c0f5955dcc3991f785f3f8e2130ed504fa3a7f44009ff458ad6bdd17f",
+                "sha256:a39f54ccbcd2757d1d63b0ec00a00980c0b382c62865b61a505163943624ab20",
+                "sha256:aabb0c5232910a20eec8563503c153a8e78bbf5459490c49ab31f6adf3f3a415",
+                "sha256:bd4ecb473a96ad0f90c20acba4f0bf0df91a4e03a1f4dd6a4bdc9ca75aa3a715",
+                "sha256:e2da3c13307eac601f3de04887624939aca8ee3c9488a0bb0eca4fb9401fc6b1",
+                "sha256:f67814c38162f4deb31f68d590771a29d5ae3b1bd64b75cf232308e5c74777e0"
+            ],
+            "version": "==1.3.0"
+        },
+        "pyyaml": {
+            "hashes": [
+                "sha256:3d7da3009c0f3e783b2c873687652d83b1bbfd5c88e9813fb7e5b03c0dd3108b",
+                "sha256:3ef3092145e9b70e3ddd2c7ad59bdd0252a94dfe3949721633e41344de00a6bf",
+                "sha256:40c71b8e076d0550b2e6380bada1f1cd1017b882f7e16f09a65be98e017f211a",
+                "sha256:558dd60b890ba8fd982e05941927a3911dc409a63dcb8b634feaa0cda69330d3",
+                "sha256:a7c28b45d9f99102fa092bb213aa12e0aaf9a6a1f5e395d36166639c1f96c3a1",
+                "sha256:aa7dd4a6a427aed7df6fb7f08a580d68d9b118d90310374716ae90b710280af1",
+                "sha256:bc558586e6045763782014934bfaf39d48b8ae85a2713117d16c39864085c613",
+                "sha256:d46d7982b62e0729ad0175a9bc7e10a566fc07b224d2c79fafb5e032727eaa04",
+                "sha256:d5eef459e30b09f5a098b9cea68bebfeb268697f78d647bd255a085371ac7f3f",
+                "sha256:e01d3203230e1786cd91ccfdc8f8454c8069c91bee3962ad93b87a4b2860f537",
+                "sha256:e170a9e6fcfd19021dd29845af83bb79236068bf5fd4df3327c1be18182b2531"
+            ],
+            "version": "==3.13"
+        },
+        "six": {
+            "hashes": [
+                "sha256:3350809f0555b11f552448330d0b52d5f24c91a322ea4a15ef22629740f3761c",
+                "sha256:d16a0141ec1a18405cd4ce8b4613101da75da0e9a7aec5bdd4fa804d0e0eba73"
+            ],
+            "version": "==1.12.0"
+        }
+    },
+    "develop": {
+        "atomicwrites": {
+            "hashes": [
+                "sha256:0312ad34fcad8fac3704d441f7b317e50af620823353ec657a53e981f92920c0",
+                "sha256:ec9ae8adaae229e4f8446952d204a3e4b5fdd2d099f9be3aaf556120135fb3ee"
+            ],
+            "version": "==1.2.1"
+        },
+        "attrs": {
+            "hashes": [
+                "sha256:10cbf6e27dbce8c30807caf056c8eb50917e0eaafe86347671b57254006c3e69",
+                "sha256:ca4be454458f9dec299268d472aaa5a11f67a4ff70093396e1ceae9c76cf4bbb"
+            ],
+            "version": "==18.2.0"
+        },
+        "certifi": {
+            "hashes": [
+                "sha256:47f9c83ef4c0c621eaef743f133f09fa8a74a9b75f037e8624f83bd1b6626cb7",
+                "sha256:993f830721089fef441cdfeb4b2c8c9df86f0c63239f06bd025a76a7daddb033"
+            ],
+            "version": "==2018.11.29"
+        },
+        "chardet": {
+            "hashes": [
+                "sha256:84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae",
+                "sha256:fc323ffcaeaed0e0a02bf4d117757b98aed530d9ed4531e3e15460124c106691"
+            ],
+            "version": "==3.0.4"
+        },
+        "codecov": {
+            "hashes": [
+                "sha256:8ed8b7c6791010d359baed66f84f061bba5bd41174bf324c31311e8737602788",
+                "sha256:ae00d68e18d8a20e9c3288ba3875ae03db3a8e892115bf9b83ef20507732bed4"
+            ],
+            "index": "pypi",
+            "version": "==2.0.15"
+        },
+        "coverage": {
+            "hashes": [
+                "sha256:09e47c529ff77bf042ecfe858fb55c3e3eb97aac2c87f0349ab5a7efd6b3939f",
+                "sha256:0a1f9b0eb3aa15c990c328535655847b3420231af299386cfe5efc98f9c250fe",
+                "sha256:0cc941b37b8c2ececfed341444a456912e740ecf515d560de58b9a76562d966d",
+                "sha256:10e8af18d1315de936d67775d3a814cc81d0747a1a0312d84e27ae5610e313b0",
+                "sha256:1b4276550b86caa60606bd3572b52769860a81a70754a54acc8ba789ce74d607",
+                "sha256:1e8a2627c48266c7b813975335cfdea58c706fe36f607c97d9392e61502dc79d",
+                "sha256:2b224052bfd801beb7478b03e8a66f3f25ea56ea488922e98903914ac9ac930b",
+                "sha256:447c450a093766744ab53bf1e7063ec82866f27bcb4f4c907da25ad293bba7e3",
+                "sha256:46101fc20c6f6568561cdd15a54018bb42980954b79aa46da8ae6f008066a30e",
+                "sha256:4710dc676bb4b779c4361b54eb308bc84d64a2fa3d78e5f7228921eccce5d815",
+                "sha256:510986f9a280cd05189b42eee2b69fecdf5bf9651d4cd315ea21d24a964a3c36",
+                "sha256:5535dda5739257effef56e49a1c51c71f1d37a6e5607bb25a5eee507c59580d1",
+                "sha256:5a7524042014642b39b1fcae85fb37556c200e64ec90824ae9ecf7b667ccfc14",
+                "sha256:5f55028169ef85e1fa8e4b8b1b91c0b3b0fa3297c4fb22990d46ff01d22c2d6c",
+                "sha256:6694d5573e7790a0e8d3d177d7a416ca5f5c150742ee703f3c18df76260de794",
+                "sha256:6831e1ac20ac52634da606b658b0b2712d26984999c9d93f0c6e59fe62ca741b",
+                "sha256:77f0d9fa5e10d03aa4528436e33423bfa3718b86c646615f04616294c935f840",
+                "sha256:828ad813c7cdc2e71dcf141912c685bfe4b548c0e6d9540db6418b807c345ddd",
+                "sha256:85a06c61598b14b015d4df233d249cd5abfa61084ef5b9f64a48e997fd829a82",
+                "sha256:8cb4febad0f0b26c6f62e1628f2053954ad2c555d67660f28dfb1b0496711952",
+                "sha256:a5c58664b23b248b16b96253880b2868fb34358911400a7ba39d7f6399935389",
+                "sha256:aaa0f296e503cda4bc07566f592cd7a28779d433f3a23c48082af425d6d5a78f",
+                "sha256:ab235d9fe64833f12d1334d29b558aacedfbca2356dfb9691f2d0d38a8a7bfb4",
+                "sha256:b3b0c8f660fae65eac74fbf003f3103769b90012ae7a460863010539bb7a80da",
+                "sha256:bab8e6d510d2ea0f1d14f12642e3f35cefa47a9b2e4c7cea1852b52bc9c49647",
+                "sha256:c45297bbdbc8bb79b02cf41417d63352b70bcb76f1bbb1ee7d47b3e89e42f95d",
+                "sha256:d19bca47c8a01b92640c614a9147b081a1974f69168ecd494687c827109e8f42",
+                "sha256:d64b4340a0c488a9e79b66ec9f9d77d02b99b772c8b8afd46c1294c1d39ca478",
+                "sha256:da969da069a82bbb5300b59161d8d7c8d423bc4ccd3b410a9b4d8932aeefc14b",
+                "sha256:ed02c7539705696ecb7dc9d476d861f3904a8d2b7e894bd418994920935d36bb",
+                "sha256:ee5b8abc35b549012e03a7b1e86c09491457dba6c94112a2482b18589cc2bdb9"
+            ],
+            "version": "==4.5.2"
+        },
+        "filelock": {
+            "hashes": [
+                "sha256:b8d5ca5ca1c815e1574aee746650ea7301de63d87935b3463d26368b76e31633",
+                "sha256:d610c1bb404daf85976d7a82eb2ada120f04671007266b708606565dd03b5be6"
+            ],
+            "version": "==3.0.10"
+        },
+        "flake8": {
+            "hashes": [
+                "sha256:6a35f5b8761f45c5513e3405f110a86bea57982c3b75b766ce7b65217abe1670",
+                "sha256:c01f8a3963b3571a8e6bd7a4063359aff90749e160778e03817cd9b71c9e07d2"
+            ],
+            "index": "pypi",
+            "version": "==3.6.0"
+        },
+        "idna": {
+            "hashes": [
+                "sha256:c357b3f628cf53ae2c4c05627ecc484553142ca23264e593d327bcde5e9c3407",
+                "sha256:ea8b7f6188e6fa117537c3df7da9fc686d485087abf6ac197f9c46432f7e4a3c"
+            ],
+            "version": "==2.8"
+        },
+        "mccabe": {
+            "hashes": [
+                "sha256:ab8a6258860da4b6677da4bd2fe5dc2c659cff31b3ee4f7f5d64e79735b80d42",
+                "sha256:dd8d182285a0fe56bace7f45b5e7d1a6ebcbf524e8f3bd87eb0f125271b8831f"
+            ],
+            "version": "==0.6.1"
+        },
+        "more-itertools": {
+            "hashes": [
+                "sha256:c187a73da93e7a8acc0001572aebc7e3c69daf7bf6881a2cea10650bd4420092",
+                "sha256:c476b5d3a34e12d40130bc2f935028b5f636df8f372dc2c1c01dc19681b2039e",
+                "sha256:fcbfeaea0be121980e15bc97b3817b5202ca73d0eae185b4550cbfce2a3ebb3d"
+            ],
+            "version": "==4.3.0"
+        },
+        "packaging": {
+            "hashes": [
+                "sha256:0886227f54515e592aaa2e5a553332c73962917f2831f1b0f9b9f4380a4b9807",
+                "sha256:f95a1e147590f204328170981833854229bb2912ac3d5f89e2a8ccd2834800c9"
+            ],
+            "version": "==18.0"
+        },
+        "pathlib2": {
+            "hashes": [
+                "sha256:25199318e8cc3c25dcb45cbe084cc061051336d5a9ea2a12448d3d8cb748f742",
+                "sha256:5887121d7f7df3603bca2f710e7219f3eca0eb69e0b7cc6e0a022e155ac931a7"
+            ],
+            "markers": "python_version < '3.6'",
+            "version": "==2.3.3"
+        },
+        "pluggy": {
+            "hashes": [
+                "sha256:447ba94990e8014ee25ec853339faf7b0fc8050cdc3289d4d71f7f410fb90095",
+                "sha256:bde19360a8ec4dfd8a20dcb811780a30998101f078fc7ded6162f0076f50508f"
+            ],
+            "version": "==0.8.0"
+        },
+        "py": {
+            "hashes": [
+                "sha256:bf92637198836372b520efcba9e020c330123be8ce527e535d185ed4b6f45694",
+                "sha256:e76826342cefe3c3d5f7e8ee4316b80d1dd8a300781612ddbc765c17ba25a6c6"
+            ],
+            "version": "==1.7.0"
+        },
+        "pycodestyle": {
+            "hashes": [
+                "sha256:cbc619d09254895b0d12c2c691e237b2e91e9b2ecf5e84c26b35400f93dcfb83",
+                "sha256:cbfca99bd594a10f674d0cd97a3d802a1fdef635d4361e1a2658de47ed261e3a"
+            ],
+            "version": "==2.4.0"
+        },
+        "pydocstyle": {
+            "hashes": [
+                "sha256:2258f9b0df68b97bf3a6c29003edc5238ff8879f1efb6f1999988d934e432bd8",
+                "sha256:5741c85e408f9e0ddf873611085e819b809fca90b619f5fd7f34bd4959da3dd4",
+                "sha256:ed79d4ec5e92655eccc21eb0c6cf512e69512b4a97d215ace46d17e4990f2039"
+            ],
+            "index": "pypi",
+            "version": "==3.0.0"
+        },
+        "pyflakes": {
+            "hashes": [
+                "sha256:9a7662ec724d0120012f6e29d6248ae3727d821bba522a0e6b356eff19126a49",
+                "sha256:f661252913bc1dbe7fcfcbf0af0db3f42ab65aabd1a6ca68fe5d466bace94dae"
+            ],
+            "version": "==2.0.0"
+        },
+        "pyparsing": {
+            "hashes": [
+                "sha256:40856e74d4987de5d01761a22d1621ae1c7f8774585acae358aa5c5936c6c90b",
+                "sha256:f353aab21fd474459d97b709e527b5571314ee5f067441dc9f88e33eecd96592"
+            ],
+            "version": "==2.3.0"
+        },
+        "pytest": {
+            "hashes": [
+                "sha256:1d131cc532be0023ef8ae265e2a779938d0619bb6c2510f52987ffcba7fa1ee4",
+                "sha256:ca4761407f1acc85ffd1609f464ca20bb71a767803505bd4127d0e45c5a50e23"
+            ],
+            "index": "pypi",
+            "version": "==4.0.1"
+        },
+        "pytest-cov": {
+            "hashes": [
+                "sha256:513c425e931a0344944f84ea47f3956be0e416d95acbd897a44970c8d926d5d7",
+                "sha256:e360f048b7dae3f2f2a9a4d067b2dd6b6a015d384d1577c994a43f3f7cbad762"
+            ],
+            "index": "pypi",
+            "version": "==2.6.0"
+        },
+        "pytest-sugar": {
+            "hashes": [
+                "sha256:26cf8289fe10880cbbc130bd77398c4e6a8b936d8393b116a5c16121d95ab283",
+                "sha256:fcd87a74b2bce5386d244b49ad60549bfbc4602527797fac167da147983f58ab"
+            ],
+            "index": "pypi",
+            "version": "==0.9.2"
+        },
+        "requests": {
+            "hashes": [
+                "sha256:65b3a120e4329e33c9889db89c80976c5272f56ea92d3e74da8a463992e3ff54",
+                "sha256:ea881206e59f41dbd0bd445437d792e43906703fff75ca8ff43ccdb11f33f263"
+            ],
+            "version": "==2.20.1"
+        },
+        "scandir": {
+            "hashes": [
+                "sha256:04b8adb105f2ed313a7c2ef0f1cf7aff4871aa7a1883fa4d8c44b5551ab052d6",
+                "sha256:1444134990356c81d12f30e4b311379acfbbcd03e0bab591de2696a3b126d58e",
+                "sha256:1b5c314e39f596875e5a95dd81af03730b338c277c54a454226978d5ba95dbb6",
+                "sha256:346619f72eb0ddc4cf355ceffd225fa52506c92a2ff05318cfabd02a144e7c4e",
+                "sha256:44975e209c4827fc18a3486f257154d34ec6eaec0f90fef0cca1caa482db7064",
+                "sha256:61859fd7e40b8c71e609c202db5b0c1dbec0d5c7f1449dec2245575bdc866792",
+                "sha256:a5e232a0bf188362fa00123cc0bb842d363a292de7126126df5527b6a369586a",
+                "sha256:c14701409f311e7a9b7ec8e337f0815baf7ac95776cc78b419a1e6d49889a383",
+                "sha256:c7708f29d843fc2764310732e41f0ce27feadde453261859ec0fca7865dfc41b",
+                "sha256:c9009c527929f6e25604aec39b0a43c3f831d2947d89d6caaab22f057b7055c8",
+                "sha256:f5c71e29b4e2af7ccdc03a020c626ede51da471173b4a6ad1e904f2b2e04b4bd"
+            ],
+            "markers": "python_version < '3.5'",
+            "version": "==1.9.0"
+        },
+        "six": {
+            "hashes": [
+                "sha256:3350809f0555b11f552448330d0b52d5f24c91a322ea4a15ef22629740f3761c",
+                "sha256:d16a0141ec1a18405cd4ce8b4613101da75da0e9a7aec5bdd4fa804d0e0eba73"
+            ],
+            "version": "==1.12.0"
+        },
+        "snowballstemmer": {
+            "hashes": [
+                "sha256:919f26a68b2c17a7634da993d91339e288964f93c274f1343e3bbbe2096e1128",
+                "sha256:9f3bcd3c401c3e862ec0ebe6d2c069ebc012ce142cce209c098ccb5b09136e89"
+            ],
+            "version": "==1.2.1"
+        },
+        "termcolor": {
+            "hashes": [
+                "sha256:1d6d69ce66211143803fbc56652b41d73b4a400a2891d7bf7a1cdf4c02de613b"
+            ],
+            "version": "==1.1.0"
+        },
+        "toml": {
+            "hashes": [
+                "sha256:229f81c57791a41d65e399fc06bf0848bab550a9dfd5ed66df18ce5f05e73d5c",
+                "sha256:235682dd292d5899d361a811df37e04a8828a5b1da3115886b73cf81ebc9100e"
+            ],
+            "version": "==0.10.0"
+        },
+        "tox": {
+            "hashes": [
+                "sha256:513e32fdf2f9e2d583c2f248f47ba9886428c949f068ac54a0469cac55df5862",
+                "sha256:75fa30e8329b41b664585f5fb837e23ce1d7e6fa1f7811f2be571c990f9d911b"
+            ],
+            "index": "pypi",
+            "version": "==3.5.3"
+        },
+        "urllib3": {
+            "hashes": [
+                "sha256:61bf29cada3fc2fbefad4fdf059ea4bd1b4a86d2b6d15e1c7c0b582b9752fe39",
+                "sha256:de9529817c93f27c8ccbfead6985011db27bd0ddfcdb2d86f3f663385c6a9c22"
+            ],
+            "version": "==1.24.1"
+        },
+        "virtualenv": {
+            "hashes": [
+                "sha256:686176c23a538ecc56d27ed9d5217abd34644823d6391cbeb232f42bf722baad",
+                "sha256:f899fafcd92e1150f40c8215328be38ff24b519cd95357fa6e78e006c7638208"
+            ],
+            "version": "==16.1.0"
+        }
+    }
+}
diff --git a/__init__.py b/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/circle.yml b/circle.yml
deleted file mode 100644
index c411e5a..0000000
--- a/circle.yml
+++ /dev/null
@@ -1,15 +0,0 @@
-machine:
-  python:
-    version: 3.5.1
-
-general:
-  artifacts:
-    - .tox/style/flake8.txt
-
-dependencies:
-  override:
-    - pip install tox
-
-test:
-  override:
-    - tox -e style
diff --git a/tests/.env b/tests/.env
new file mode 100644
index 0000000..e69de29
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/conftest.py b/tests/conftest.py
new file mode 100644
index 0000000..9aedc20
--- /dev/null
+++ b/tests/conftest.py
@@ -0,0 +1,32 @@
+from unittest.mock import MagicMock, patch
+import pytest
+
+
+@pytest.fixture(autouse=True)
+def sublime(request):
+    mock = MagicMock()
+    patcher = patch.dict('sys.modules', {
+        'sublime': mock,
+    })
+    patcher.start()
+    request.addfinalizer(patcher.stop)
+
+    return mock
+
+
+@pytest.fixture(autouse=True)
+def sublime_plugin(request):
+    mock = MagicMock()
+    patcher = patch.dict('sys.modules', {
+        'sublime_plugin': mock,
+    })
+    patcher.start()
+    request.addfinalizer(patcher.stop)
+
+    return mock
+
+
+@pytest.fixture()
+def root_commands():
+    from .. import commands
+    return commands
diff --git a/tests/test_commands.py b/tests/test_commands.py
new file mode 100644
index 0000000..28e4da6
--- /dev/null
+++ b/tests/test_commands.py
@@ -0,0 +1,2 @@
+def test_exists(root_commands):
+    assert root_commands
diff --git a/tox.ini b/tox.ini
index 2e9e6b2..b6bc7f6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,17 +1,51 @@
 [tox]
-envlist = style
 skipsdist = True
 
+[testenv]
+install_command =
+    pipenv install --ignore-pipfile && \
+    pipenv install --dev --ignore-pipfile && \
+    pipenv --dev -r {packages}
+list_dependencies_command = pipenv lock -r
+whitelist_externals =
+    pipenv
+    rm
+    mkdir
+setenv =
+    PYTHONPATH = {toxinidir}
+    PIPENV_DOTENV_LOCATION = {toxinidir}/tests/.env
+    CODECOV_ENV =
+passenv = TOXENV CI CODECOV_TOKEN CODECOV_ENV
+
+[testenv:test]
+commands =
+    rm -rf pytest
+    mkdir -p pytest/coverage
+    pipenv run py.test
+    pipenv run codecov -e TOXENV
+
 [testenv:style]
-deps =
-    flake8
 commands =
-    flake8 --output-file={envdir}/flake8.txt {toxinidir}/commands.py
+    pipenv run flake8 {toxinidir}/commands.py
+    pipenv run pydocstyle
+
+[pytest]
+testpaths = tests
+addopts =
+    -v
+    --cov .
+    --cov-config .coveragerc
+    --cov-report term-missing
+    --cov-report html:pytest/coverage
+    --junitxml pytest/junit.xml
 
 [flake8]
 max-line-length = 120
 max-complexity = 10
-tee = True
-count = True
-statistics = True
+tee = true
+count = true
+show-statistics = true
 show-source = True
+
+[pydocstyle]
+match = '(?!test_).*\.py|(?!conftest\.py)'