diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1ddd017..5720b9f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -51,7 +51,7 @@ jobs:
         run: |
           set -euo pipefail
           python -m pip install --upgrade pip
-          python -m pip install -e . pandas pytest ruff
+          python -m pip install -e . pandas pytest pytest-cov ruff
           python -m pip install --no-deps -e external/QuantPlatformKit
 
       - name: Run Ruff
@@ -62,4 +62,4 @@ jobs:
       - name: Run unit tests
         run: |
           set -euo pipefail
-          PYTHONPATH=src python -m pytest -q tests
+          PYTHONPATH=src python -m pytest -q tests --cov --cov-report=term --cov-report=xml
diff --git a/pyproject.toml b/pyproject.toml
index 7eba274..bd39bce 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,3 +26,11 @@ where = ["src"]
 ignore = ["E701", "E702", "E741", "F841", "F821", "B008", "F401", "F601", "E402"]
 target-version = "py311"
 line-length = 120
+
+[tool.coverage.run]
+branch = true
+source = ["src"]
+omit = ["tests/*", "*/external/*"]
+
+[tool.coverage.report]
+show_missing = true