diff --git a/.coveragerc b/.coveragerc
new file mode 100644
index 0000000..b411f9d
--- /dev/null
+++ b/.coveragerc
@@ -0,0 +1,24 @@
+[run]
+source =
+       SOURCES/
+       tests/
+
+[report]
+# Regexes for lines to exclude from consideration
+exclude_lines =
+    # Have to re-enable the standard pragma
+    pragma: no cover
+
+    # Don't complain if tests don't hit defensive assertion code:
+    raise AssertionError
+    raise NotImplementedError
+    \<assert\>.*
+
+    # Don't complain if non-runnable code isn't run:
+    if 0:
+    if __name__ == .__main__.:
+
+precision = 1
+include =
+        SOURCES/*
+        tests/*
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index fffa84b..8a1ef1a 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -12,9 +12,8 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install mock pytest pyfakefs
+        pip install pathlib mock pytest pytest-cov pyfakefs
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
     - name: pytest
       run: |
-        cd tests
-        pytest
+        pytest --cov --cov-report=xml --cov-report=term tests
diff --git a/.gitignore b/.gitignore
index eeb8a6e..0b837b3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,4 @@
 **/__pycache__
+*.pyc
+/.coverage
+/coverage.xml