diff --git a/pyproject.toml b/pyproject.toml
index 8915849b..1232599b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -56,6 +56,7 @@ include = [
     "/httpcore",
     "/CHANGELOG.md",
     "/README.md",
+    "/tests"
 ]
 
 [tool.hatch.metadata.hooks.fancy-pypi-readme]