diff --git a/poetry.lock b/poetry.lock
index fc3c916..0309b29 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -141,6 +141,73 @@ files = [
     {file = "colorama-0.4.6.tar.gz", hash = "sha256:08695f5cb7ed6e0531a20572697297273c47b8cae5a63ffc6d6ed5c201be6e44"},
 ]
 
+[[package]]
+name = "coverage"
+version = "7.4.2"
+description = "Code coverage measurement for Python"
+optional = false
+python-versions = ">=3.8"
+files = [
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+    {file = "coverage-7.4.2-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:fe6e43c8b510719b48af7db9631b5fbac910ade4bd90e6378c85ac5ac706382c"},
+    {file = "coverage-7.4.2-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:8b98c89db1b150d851a7840142d60d01d07677a18f0f46836e691c38134ed18b"},
+    {file = "coverage-7.4.2-cp310-cp310-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:c5f9683be6a5b19cd776ee4e2f2ffb411424819c69afab6b2db3a0a364ec6642"},
+    {file = "coverage-7.4.2-cp310-cp310-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:78cdcbf7b9cb83fe047ee09298e25b1cd1636824067166dc97ad0543b079d22f"},
+    {file = "coverage-7.4.2-cp310-cp310-musllinux_1_1_aarch64.whl", hash = "sha256:2599972b21911111114100d362aea9e70a88b258400672626efa2b9e2179609c"},
+    {file = "coverage-7.4.2-cp310-cp310-musllinux_1_1_i686.whl", hash = "sha256:ef00d31b7569ed3cb2036f26565f1984b9fc08541731ce01012b02a4c238bf03"},
+    {file = "coverage-7.4.2-cp310-cp310-musllinux_1_1_x86_64.whl", hash = "sha256:20a875bfd8c282985c4720c32aa05056f77a68e6d8bbc5fe8632c5860ee0b49b"},
+    {file = "coverage-7.4.2-cp310-cp310-win32.whl", hash = "sha256:b3f2b1eb229f23c82898eedfc3296137cf1f16bb145ceab3edfd17cbde273fb7"},
+    {file = "coverage-7.4.2-cp310-cp310-win_amd64.whl", hash = "sha256:7df95fdd1432a5d2675ce630fef5f239939e2b3610fe2f2b5bf21fa505256fa3"},
+    {file = "coverage-7.4.2-cp311-cp311-macosx_10_9_x86_64.whl", hash = "sha256:a8ddbd158e069dded57738ea69b9744525181e99974c899b39f75b2b29a624e2"},
+    {file = "coverage-7.4.2-cp311-cp311-macosx_11_0_arm64.whl", hash = "sha256:81a5fb41b0d24447a47543b749adc34d45a2cf77b48ca74e5bf3de60a7bd9edc"},
+    {file = "coverage-7.4.2-cp311-cp311-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:2412e98e70f16243be41d20836abd5f3f32edef07cbf8f407f1b6e1ceae783ac"},
+    {file = "coverage-7.4.2-cp311-cp311-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:ddb79414c15c6f03f56cc68fa06994f047cf20207c31b5dad3f6bab54a0f66ef"},
+    {file = "coverage-7.4.2-cp311-cp311-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:cf89ab85027427d351f1de918aff4b43f4eb5f33aff6835ed30322a86ac29c9e"},
+    {file = "coverage-7.4.2-cp311-cp311-musllinux_1_1_aarch64.whl", hash = "sha256:a178b7b1ac0f1530bb28d2e51f88c0bab3e5949835851a60dda80bff6052510c"},
+    {file = "coverage-7.4.2-cp311-cp311-musllinux_1_1_i686.whl", hash = "sha256:06fe398145a2e91edaf1ab4eee66149c6776c6b25b136f4a86fcbbb09512fd10"},
+    {file = "coverage-7.4.2-cp311-cp311-musllinux_1_1_x86_64.whl", hash = "sha256:18cac867950943fe93d6cd56a67eb7dcd2d4a781a40f4c1e25d6f1ed98721a55"},
+    {file = "coverage-7.4.2-cp311-cp311-win32.whl", hash = "sha256:f72cdd2586f9a769570d4b5714a3837b3a59a53b096bb954f1811f6a0afad305"},
+    {file = "coverage-7.4.2-cp311-cp311-win_amd64.whl", hash = "sha256:d779a48fac416387dd5673fc5b2d6bd903ed903faaa3247dc1865c65eaa5a93e"},
+    {file = "coverage-7.4.2-cp312-cp312-macosx_10_9_x86_64.whl", hash = "sha256:adbdfcda2469d188d79771d5696dc54fab98a16d2ef7e0875013b5f56a251047"},
+    {file = "coverage-7.4.2-cp312-cp312-macosx_11_0_arm64.whl", hash = "sha256:ac4bab32f396b03ebecfcf2971668da9275b3bb5f81b3b6ba96622f4ef3f6e17"},
+    {file = "coverage-7.4.2-cp312-cp312-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:006d220ba2e1a45f1de083d5022d4955abb0aedd78904cd5a779b955b019ec73"},
+    {file = "coverage-7.4.2-cp312-cp312-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:3733545eb294e5ad274abe131d1e7e7de4ba17a144505c12feca48803fea5f64"},
+    {file = "coverage-7.4.2-cp312-cp312-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:42a9e754aa250fe61f0f99986399cec086d7e7a01dd82fd863a20af34cbce962"},
+    {file = "coverage-7.4.2-cp312-cp312-musllinux_1_1_aarch64.whl", hash = "sha256:2ed37e16cf35c8d6e0b430254574b8edd242a367a1b1531bd1adc99c6a5e00fe"},
+    {file = "coverage-7.4.2-cp312-cp312-musllinux_1_1_i686.whl", hash = "sha256:b953275d4edfab6cc0ed7139fa773dfb89e81fee1569a932f6020ce7c6da0e8f"},
+    {file = "coverage-7.4.2-cp312-cp312-musllinux_1_1_x86_64.whl", hash = "sha256:32b4ab7e6c924f945cbae5392832e93e4ceb81483fd6dc4aa8fb1a97b9d3e0e1"},
+    {file = "coverage-7.4.2-cp312-cp312-win32.whl", hash = "sha256:f5df76c58977bc35a49515b2fbba84a1d952ff0ec784a4070334dfbec28a2def"},
+    {file = "coverage-7.4.2-cp312-cp312-win_amd64.whl", hash = "sha256:34423abbaad70fea9d0164add189eabaea679068ebdf693baa5c02d03e7db244"},
+    {file = "coverage-7.4.2-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:5b11f9c6587668e495cc7365f85c93bed34c3a81f9f08b0920b87a89acc13469"},
+    {file = "coverage-7.4.2-cp38-cp38-macosx_11_0_arm64.whl", hash = "sha256:51593a1f05c39332f623d64d910445fdec3d2ac2d96b37ce7f331882d5678ddf"},
+    {file = "coverage-7.4.2-cp38-cp38-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:69f1665165ba2fe7614e2f0c1aed71e14d83510bf67e2ee13df467d1c08bf1e8"},
+    {file = "coverage-7.4.2-cp38-cp38-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:b3c8bbb95a699c80a167478478efe5e09ad31680931ec280bf2087905e3b95ec"},
+    {file = "coverage-7.4.2-cp38-cp38-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:175f56572f25e1e1201d2b3e07b71ca4d201bf0b9cb8fad3f1dfae6a4188de86"},
+    {file = "coverage-7.4.2-cp38-cp38-musllinux_1_1_aarch64.whl", hash = "sha256:8562ca91e8c40864942615b1d0b12289d3e745e6b2da901d133f52f2d510a1e3"},
+    {file = "coverage-7.4.2-cp38-cp38-musllinux_1_1_i686.whl", hash = "sha256:d9a1ef0f173e1a19738f154fb3644f90d0ada56fe6c9b422f992b04266c55d5a"},
+    {file = "coverage-7.4.2-cp38-cp38-musllinux_1_1_x86_64.whl", hash = "sha256:f40ac873045db4fd98a6f40387d242bde2708a3f8167bd967ccd43ad46394ba2"},
+    {file = "coverage-7.4.2-cp38-cp38-win32.whl", hash = "sha256:d1b750a8409bec61caa7824bfd64a8074b6d2d420433f64c161a8335796c7c6b"},
+    {file = "coverage-7.4.2-cp38-cp38-win_amd64.whl", hash = "sha256:b4ae777bebaed89e3a7e80c4a03fac434a98a8abb5251b2a957d38fe3fd30088"},
+    {file = "coverage-7.4.2-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:3ff7f92ae5a456101ca8f48387fd3c56eb96353588e686286f50633a611afc95"},
+    {file = "coverage-7.4.2-cp39-cp39-macosx_11_0_arm64.whl", hash = "sha256:861d75402269ffda0b33af94694b8e0703563116b04c681b1832903fac8fd647"},
+    {file = "coverage-7.4.2-cp39-cp39-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:3507427d83fa961cbd73f11140f4a5ce84208d31756f7238d6257b2d3d868405"},
+    {file = "coverage-7.4.2-cp39-cp39-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:bf711d517e21fb5bc429f5c4308fbc430a8585ff2a43e88540264ae87871e36a"},
+    {file = "coverage-7.4.2-cp39-cp39-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:c00e54f0bd258ab25e7f731ca1d5144b0bf7bec0051abccd2bdcff65fa3262c9"},
+    {file = "coverage-7.4.2-cp39-cp39-musllinux_1_1_aarch64.whl", hash = "sha256:f8e845d894e39fb53834da826078f6dc1a933b32b1478cf437007367efaf6f6a"},
+    {file = "coverage-7.4.2-cp39-cp39-musllinux_1_1_i686.whl", hash = "sha256:840456cb1067dc350af9080298c7c2cfdddcedc1cb1e0b30dceecdaf7be1a2d3"},
+    {file = "coverage-7.4.2-cp39-cp39-musllinux_1_1_x86_64.whl", hash = "sha256:c11ca2df2206a4e3e4c4567f52594637392ed05d7c7fb73b4ea1c658ba560265"},
+    {file = "coverage-7.4.2-cp39-cp39-win32.whl", hash = "sha256:3ff5bdb08d8938d336ce4088ca1a1e4b6c8cd3bef8bb3a4c0eb2f37406e49643"},
+    {file = "coverage-7.4.2-cp39-cp39-win_amd64.whl", hash = "sha256:ac9e95cefcf044c98d4e2c829cd0669918585755dd9a92e28a1a7012322d0a95"},
+    {file = "coverage-7.4.2-pp38.pp39.pp310-none-any.whl", hash = "sha256:f593a4a90118d99014517c2679e04a4ef5aee2d81aa05c26c734d271065efcb6"},
+    {file = "coverage-7.4.2.tar.gz", hash = "sha256:1a5ee18e3a8d766075ce9314ed1cb695414bae67df6a4b0805f5137d93d6f1cb"},
+]
+
+[package.dependencies]
+tomli = {version = "*", optional = true, markers = "python_full_version <= \"3.11.0a6\" and extra == \"toml\""}
+
+[package.extras]
+toml = ["tomli"]
+
 [[package]]
 name = "dictpath"
 version = "0.1.3"
@@ -798,6 +865,24 @@ tomli = {version = ">=1.0.0", markers = "python_version < \"3.11\""}
 [package.extras]
 testing = ["argcomplete", "attrs (>=19.2.0)", "hypothesis (>=3.56)", "mock", "nose", "pygments (>=2.7.2)", "requests", "setuptools", "xmlschema"]
 
+[[package]]
+name = "pytest-cov"
+version = "4.1.0"
+description = "Pytest plugin for measuring coverage."
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "pytest-cov-4.1.0.tar.gz", hash = "sha256:3904b13dfbfec47f003b8e77fd5b589cd11904a21ddf1ab38a64f204d6a10ef6"},
+    {file = "pytest_cov-4.1.0-py3-none-any.whl", hash = "sha256:6ba70b9e97e69fcc3fb45bfeab2d0a138fb65c4d0d6a41ef33983ad114be8c3a"},
+]
+
+[package.dependencies]
+coverage = {version = ">=5.2.1", extras = ["toml"]}
+pytest = ">=4.6"
+
+[package.extras]
+testing = ["fields", "hunter", "process-tests", "pytest-xdist", "six", "virtualenv"]
+
 [[package]]
 name = "pytest-mypy"
 version = "0.10.3"
@@ -1106,4 +1191,4 @@ watchdog = ["watchdog (>=2.3)"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.9"
-content-hash = "1744c303ff528a8ecf7527e344315014f62e0a8e497673dff885aebc69c98fff"
+content-hash = "00d038a211c64379cb0a4262307a6b55bdf6571aca7b1a4df8c46c58b83fd02a"
diff --git a/pyproject.toml b/pyproject.toml
index fb8f37f..1e98b74 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,6 +25,7 @@ tutor = 'tutor.cli:main'
 
 [tool.poetry.group.dev.dependencies]
 pytest = "*"
+pytest-cov = "*"
 pytest-mypy = "*"
 black = "*"
 mypy = "*"
@@ -32,7 +33,7 @@ types-pyyaml = "^6.0"
 hypothesis = "^6.68.2"
 
 [tool.pytest.ini_options]
-addopts = "--mypy"
+addopts = "--cov --mypy"
 filterwarnings = """
 ignore::DeprecationWarning:openapi_core.*:
 ignore::DeprecationWarning:openapi_schema_validator.*: