diff --git a/poetry.lock b/poetry.lock
index 714bcdc..015f3c1 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -39,6 +39,20 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
+[[package]]
+name = "coverage"
+version = "6.2"
+description = "Code coverage measurement for Python"
+category = "dev"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+tomli = {version = "*", optional = true, markers = "extra == \"toml\""}
+
+[package.extras]
+toml = ["tomli"]
+
 [[package]]
 name = "iniconfig"
 version = "1.1.1"
@@ -110,6 +124,21 @@ toml = "*"
 [package.extras]
 testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
 
+[[package]]
+name = "pytest-cov"
+version = "3.0.0"
+description = "Pytest plugin for measuring coverage."
+category = "dev"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+coverage = {version = ">=5.2.1", extras = ["toml"]}
+pytest = ">=4.6"
+
+[package.extras]
+testing = ["fields", "hunter", "process-tests", "six", "pytest-xdist", "virtualenv"]
+
 [[package]]
 name = "toml"
 version = "0.10.2"
@@ -118,10 +147,18 @@ category = "dev"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 
+[[package]]
+name = "tomli"
+version = "1.2.2"
+description = "A lil' TOML parser"
+category = "dev"
+optional = false
+python-versions = ">=3.6"
+
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.9"
-content-hash = "11b15112d348ca956ae061f53d51b37fcb0adb9b06f9b1245c4a93eddc08bb1f"
+content-hash = "47104052627c5737e341ecfb58eb57c259f5baf5c99d7251dc860b331e18bee0"
 
 [metadata.files]
 atomicwrites = [
@@ -140,6 +177,55 @@ colorama = [
     {file = "colorama-0.4.4-py2.py3-none-any.whl", hash = "sha256:9f47eda37229f68eee03b24b9748937c7dc3868f906e8ba69fbcbdd3bc5dc3e2"},
     {file = "colorama-0.4.4.tar.gz", hash = "sha256:5941b2b48a20143d2267e95b1c2a7603ce057ee39fd88e7329b0c292aa16869b"},
 ]
+coverage = [
+    {file = "coverage-6.2-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:6dbc1536e105adda7a6312c778f15aaabe583b0e9a0b0a324990334fd458c94b"},
+    {file = "coverage-6.2-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:174cf9b4bef0db2e8244f82059a5a72bd47e1d40e71c68ab055425172b16b7d0"},
+    {file = "coverage-6.2-cp310-cp310-manylinux_2_5_i686.manylinux1_i686.manylinux_2_12_i686.manylinux2010_i686.whl", hash = "sha256:92b8c845527eae547a2a6617d336adc56394050c3ed8a6918683646328fbb6da"},
+    {file = "coverage-6.2-cp310-cp310-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl", hash = "sha256:c7912d1526299cb04c88288e148c6c87c0df600eca76efd99d84396cfe00ef1d"},
+    {file = "coverage-6.2-cp310-cp310-musllinux_1_1_aarch64.whl", hash = "sha256:d5d2033d5db1d58ae2d62f095e1aefb6988af65b4b12cb8987af409587cc0739"},
+    {file = "coverage-6.2-cp310-cp310-musllinux_1_1_i686.whl", hash = "sha256:3feac4084291642165c3a0d9eaebedf19ffa505016c4d3db15bfe235718d4971"},
+    {file = "coverage-6.2-cp310-cp310-musllinux_1_1_x86_64.whl", hash = "sha256:276651978c94a8c5672ea60a2656e95a3cce2a3f31e9fb2d5ebd4c215d095840"},
+    {file = "coverage-6.2-cp310-cp310-win32.whl", hash = "sha256:f506af4f27def639ba45789fa6fde45f9a217da0be05f8910458e4557eed020c"},
+    {file = "coverage-6.2-cp310-cp310-win_amd64.whl", hash = "sha256:3f7c17209eef285c86f819ff04a6d4cbee9b33ef05cbcaae4c0b4e8e06b3ec8f"},
+    {file = "coverage-6.2-cp311-cp311-macosx_10_14_x86_64.whl", hash = "sha256:13362889b2d46e8d9f97c421539c97c963e34031ab0cb89e8ca83a10cc71ac76"},
+    {file = "coverage-6.2-cp311-cp311-manylinux_2_5_x86_64.manylinux1_x86_64.whl", hash = "sha256:22e60a3ca5acba37d1d4a2ee66e051f5b0e1b9ac950b5b0cf4aa5366eda41d47"},
+    {file = "coverage-6.2-cp311-cp311-win_amd64.whl", hash = "sha256:b637c57fdb8be84e91fac60d9325a66a5981f8086c954ea2772efe28425eaf64"},
+    {file = "coverage-6.2-cp36-cp36m-macosx_10_9_x86_64.whl", hash = "sha256:f467bbb837691ab5a8ca359199d3429a11a01e6dfb3d9dcc676dc035ca93c0a9"},
+    {file = "coverage-6.2-cp36-cp36m-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:2641f803ee9f95b1f387f3e8f3bf28d83d9b69a39e9911e5bfee832bea75240d"},
+    {file = "coverage-6.2-cp36-cp36m-manylinux_2_5_i686.manylinux1_i686.manylinux_2_12_i686.manylinux2010_i686.whl", hash = "sha256:1219d760ccfafc03c0822ae2e06e3b1248a8e6d1a70928966bafc6838d3c9e48"},
+    {file = "coverage-6.2-cp36-cp36m-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl", hash = "sha256:9a2b5b52be0a8626fcbffd7e689781bf8c2ac01613e77feda93d96184949a98e"},
+    {file = "coverage-6.2-cp36-cp36m-musllinux_1_1_aarch64.whl", hash = "sha256:8e2c35a4c1f269704e90888e56f794e2d9c0262fb0c1b1c8c4ee44d9b9e77b5d"},
+    {file = "coverage-6.2-cp36-cp36m-musllinux_1_1_i686.whl", hash = "sha256:5d6b09c972ce9200264c35a1d53d43ca55ef61836d9ec60f0d44273a31aa9f17"},
+    {file = "coverage-6.2-cp36-cp36m-musllinux_1_1_x86_64.whl", hash = "sha256:e3db840a4dee542e37e09f30859f1612da90e1c5239a6a2498c473183a50e781"},
+    {file = "coverage-6.2-cp36-cp36m-win32.whl", hash = "sha256:4e547122ca2d244f7c090fe3f4b5a5861255ff66b7ab6d98f44a0222aaf8671a"},
+    {file = "coverage-6.2-cp36-cp36m-win_amd64.whl", hash = "sha256:01774a2c2c729619760320270e42cd9e797427ecfddd32c2a7b639cdc481f3c0"},
+    {file = "coverage-6.2-cp37-cp37m-macosx_10_9_x86_64.whl", hash = "sha256:fb8b8ee99b3fffe4fd86f4c81b35a6bf7e4462cba019997af2fe679365db0c49"},
+    {file = "coverage-6.2-cp37-cp37m-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:619346d57c7126ae49ac95b11b0dc8e36c1dd49d148477461bb66c8cf13bb521"},
+    {file = "coverage-6.2-cp37-cp37m-manylinux_2_5_i686.manylinux1_i686.manylinux_2_12_i686.manylinux2010_i686.whl", hash = "sha256:0a7726f74ff63f41e95ed3a89fef002916c828bb5fcae83b505b49d81a066884"},
+    {file = "coverage-6.2-cp37-cp37m-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl", hash = "sha256:cfd9386c1d6f13b37e05a91a8583e802f8059bebfccde61a418c5808dea6bbfa"},
+    {file = "coverage-6.2-cp37-cp37m-musllinux_1_1_aarch64.whl", hash = "sha256:17e6c11038d4ed6e8af1407d9e89a2904d573be29d51515f14262d7f10ef0a64"},
+    {file = "coverage-6.2-cp37-cp37m-musllinux_1_1_i686.whl", hash = "sha256:c254b03032d5a06de049ce8bca8338a5185f07fb76600afff3c161e053d88617"},
+    {file = "coverage-6.2-cp37-cp37m-musllinux_1_1_x86_64.whl", hash = "sha256:dca38a21e4423f3edb821292e97cec7ad38086f84313462098568baedf4331f8"},
+    {file = "coverage-6.2-cp37-cp37m-win32.whl", hash = "sha256:600617008aa82032ddeace2535626d1bc212dfff32b43989539deda63b3f36e4"},
+    {file = "coverage-6.2-cp37-cp37m-win_amd64.whl", hash = "sha256:bf154ba7ee2fd613eb541c2bc03d3d9ac667080a737449d1a3fb342740eb1a74"},
+    {file = "coverage-6.2-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:f9afb5b746781fc2abce26193d1c817b7eb0e11459510fba65d2bd77fe161d9e"},
+    {file = "coverage-6.2-cp38-cp38-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:edcada2e24ed68f019175c2b2af2a8b481d3d084798b8c20d15d34f5c733fa58"},
+    {file = "coverage-6.2-cp38-cp38-manylinux_2_5_i686.manylinux1_i686.manylinux_2_12_i686.manylinux2010_i686.whl", hash = "sha256:a9c8c4283e17690ff1a7427123ffb428ad6a52ed720d550e299e8291e33184dc"},
+    {file = "coverage-6.2-cp38-cp38-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl", hash = "sha256:f614fc9956d76d8a88a88bb41ddc12709caa755666f580af3a688899721efecd"},
+    {file = "coverage-6.2-cp38-cp38-musllinux_1_1_aarch64.whl", hash = "sha256:9365ed5cce5d0cf2c10afc6add145c5037d3148585b8ae0e77cc1efdd6aa2953"},
+    {file = "coverage-6.2-cp38-cp38-musllinux_1_1_i686.whl", hash = "sha256:8bdfe9ff3a4ea37d17f172ac0dff1e1c383aec17a636b9b35906babc9f0f5475"},
+    {file = "coverage-6.2-cp38-cp38-musllinux_1_1_x86_64.whl", hash = "sha256:63c424e6f5b4ab1cf1e23a43b12f542b0ec2e54f99ec9f11b75382152981df57"},
+    {file = "coverage-6.2-cp38-cp38-win32.whl", hash = "sha256:49dbff64961bc9bdd2289a2bda6a3a5a331964ba5497f694e2cbd540d656dc1c"},
+    {file = "coverage-6.2-cp38-cp38-win_amd64.whl", hash = "sha256:9a29311bd6429be317c1f3fe4bc06c4c5ee45e2fa61b2a19d4d1d6111cb94af2"},
+    {file = "coverage-6.2-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:03b20e52b7d31be571c9c06b74746746d4eb82fc260e594dc662ed48145e9efd"},
+    {file = "coverage-6.2-cp39-cp39-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:215f8afcc02a24c2d9a10d3790b21054b58d71f4b3c6f055d4bb1b15cecce685"},
+    {file = "coverage-6.2-cp39-cp39-manylinux_2_5_i686.manylinux1_i686.manylinux_2_12_i686.manylinux2010_i686.whl", hash = "sha256:a4bdeb0a52d1d04123b41d90a4390b096f3ef38eee35e11f0b22c2d031222c6c"},
+    {file = "coverage-6.2-cp39-cp39-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl", hash = "sha256:c332d8f8d448ded473b97fefe4a0983265af21917d8b0cdcb8bb06b2afe632c3"},
+    {file = "coverage-6.2-cp39-cp39-win32.whl", hash = "sha256:6e1394d24d5938e561fbeaa0cd3d356207579c28bd1792f25a068743f2d5b282"},
+    {file = "coverage-6.2-cp39-cp39-win_amd64.whl", hash = "sha256:86f2e78b1eff847609b1ca8050c9e1fa3bd44ce755b2ec30e70f2d3ba3844644"},
+    {file = "coverage-6.2-pp36.pp37.pp38-none-any.whl", hash = "sha256:5829192582c0ec8ca4a2532407bc14c2f338d9878a10442f5d03804a95fac9de"},
+    {file = "coverage-6.2.tar.gz", hash = "sha256:e2cad8093172b7d1595b4ad66f24270808658e11acf43a8f95b41276162eb5b8"},
+]
 iniconfig = [
     {file = "iniconfig-1.1.1-py2.py3-none-any.whl", hash = "sha256:011e24c64b7f47f6ebd835bb12a743f2fbe9a26d4cecaa7f53bc4f35ee9da8b3"},
     {file = "iniconfig-1.1.1.tar.gz", hash = "sha256:bc3af051d7d14b2ee5ef9969666def0cd1a000e121eaea580d4a313df4b37f32"},
@@ -164,7 +250,15 @@ pytest = [
     {file = "pytest-6.2.5-py3-none-any.whl", hash = "sha256:7310f8d27bc79ced999e760ca304d69f6ba6c6649c0b60fb0e04a4a77cacc134"},
     {file = "pytest-6.2.5.tar.gz", hash = "sha256:131b36680866a76e6781d13f101efb86cf674ebb9762eb70d3082b6f29889e89"},
 ]
+pytest-cov = [
+    {file = "pytest-cov-3.0.0.tar.gz", hash = "sha256:e7f0f5b1617d2210a2cabc266dfe2f4c75a8d32fb89eafb7ad9d06f6d076d470"},
+    {file = "pytest_cov-3.0.0-py3-none-any.whl", hash = "sha256:578d5d15ac4a25e5f961c938b85a05b09fdaae9deef3bb6de9a6e766622ca7a6"},
+]
 toml = [
     {file = "toml-0.10.2-py2.py3-none-any.whl", hash = "sha256:806143ae5bfb6a3c6e736a764057db0e6a0e05e338b5630894a5f779cabb4f9b"},
     {file = "toml-0.10.2.tar.gz", hash = "sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f"},
 ]
+tomli = [
+    {file = "tomli-1.2.2-py3-none-any.whl", hash = "sha256:f04066f68f5554911363063a30b108d2b5a5b1a010aa8b6132af78489fe3aade"},
+    {file = "tomli-1.2.2.tar.gz", hash = "sha256:c6ce0015eb38820eaf32b5db832dbc26deb3dd427bd5f6556cf0acac2c214fee"},
+]
diff --git a/pyproject.toml b/pyproject.toml
index a7b28dc..ea66bf7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,10 +14,23 @@ click = "^8.0"
 
 [tool.poetry.dev-dependencies]
 pytest = "^6.2"
+coverage = {extras = ["toml"], version = "^6.2"}
+pytest-cov = "^3.0.0"
 
 [tool.poetry.scripts]
 habitmove = "habitmove.cli:main"
 
+[tool.coverage.paths]
+source = ["src", "*/site-packages"]
+
+[tool.coverage.run]
+branch = true
+source = ["habitmove"]
+
+[tool.coverage.report]
+show_missing = true
+# fail_under = 80  # if we want pytest to automatically fail if not enough tests supplied
+
 [build-system]
 requires = ["poetry-core>=1.0.0"]
 build-backend = "poetry.core.masonry.api"
diff --git a/src/habitmove/loopdata.py b/src/habitmove/loopdata.py
index 5d91a99..8b794f6 100644
--- a/src/habitmove/loopdata.py
+++ b/src/habitmove/loopdata.py
@@ -20,7 +20,6 @@ class Habit:
     position: int = 0
     uuid: str = ""
 
-    # TODO test post init uuid setting
     def __post_init__(self):
         if not self.uuid or self.uuid == "":
             self.uuid = uuid4().hex
diff --git a/tests/test_cli.py b/tests/test_cli.py
index ffd50e3..0ab07a1 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -1,10 +1,15 @@
 import click.testing
+import pytest
 
 from habitmove import cli
 
 
-def test_cli_fails_without_file():
-    runner = click.testing.CliRunner()
+@pytest.fixture
+def runner():
+    return click.testing.CliRunner()
+
+
+def test_cli_fails_without_file(runner):
     result = runner.invoke(cli.main)
     assert result.exit_code == 2
     assert "Missing argument" in result.output