diff --git a/pyproject.toml b/pyproject.toml
index d29716a..ee0693c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,5 +16,12 @@ advent-of-code-2023 = "advent_of_code.__main__:main"
 [tool.pytest.ini_options]
 testpaths = ["tests"]
 
+[tool.coverage.run]
+source = ["advent_of_code"]
+omit = ["advent_of_code/__main__.py"]
+
+[tool.coverage.report]
+show_missing = true
+
 [tool.isort]
 profile = "black"