chore: Configure coverage

Author: effigies

pyproject.toml

@@ -25,7 +25,7 @@ dependencies = [
 ]
 
 [project.optional-dependencies]
-test = ["pytest >= 8.0", "pytest-cov >= 5.0"]
+test = ["pytest >= 8.0", "pytest-cov >= 5.0", "coverage[toml] >= 7.2"]
 lint = ["pre-commit == 4.2.0"]
 dev = ["changelist == 0.5"]
 
@@ -92,3 +92,13 @@ ignore = [
 
 [tool.ruff.format]
 docstring-code-format = true
+
+[tool.coverage.run]
+branch = true
+source = ["lazy_loader", "tests"]
+
+[tool.coverage.paths]
+source = [
+  "src/lazy_loader",
+  "*/site-packages/lazy_loader",
+]