diff --git a/pyproject.toml b/pyproject.toml
index 62b6ea7..b16c884 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,7 +45,7 @@ Changelog = "https://github.com/Zeutschler/datespan/CHANGELOG.md"
 pypi = "https://pypi.org/project/datespan/"
 
 [tool.setuptools]
-packages = ["datespan", "datespan.tests"]
+packages = ["datespan"]
 
 [tool.setuptools.dynamic]
 version = {attr = "datespan.__version__"}