diff --git a/pyproject.toml b/pyproject.toml
index 1dd18be..2975153 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -49,10 +49,10 @@ pytest = "^8.3.3"
 pytest-cov = "^5.0.0"
 
 [tool.coverage.run]
-include = refextract/*.py
+include = ["refextract/*.py"]
 
 [tool.pytest.ini_options]
-addopts = --cov=refextract --cov-report=term-missing:skip-covered
+addopts = "--cov=refextract --cov-report=term-missing:skip-covered"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]