diff --git a/pyproject.toml b/pyproject.toml
index d86f343..54757f2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,3 +1,4 @@
 [tool.pytest.ini_options]
 testpaths = ["tests"]
 pythonpath = ["lambdas/classifier", "lambdas/slack_post", "cdk"]
+addopts = "--cov=lambdas --cov-report=term-missing"
diff --git a/tests/requirements.txt b/tests/requirements.txt
new file mode 100644
index 0000000..9955dec
--- /dev/null
+++ b/tests/requirements.txt
@@ -0,0 +1,2 @@
+pytest
+pytest-cov