diff --git a/pyproject.toml b/pyproject.toml
index 20bc225..127548c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -107,3 +107,8 @@ show_missing = true
 [tool.coverage.run]
 source = ["src"]
 
+[[tool.uv.index]]
+name = "testpypi"
+url = "https://test.pypi.org/simple/"
+publish-url = "https://test.pypi.org/legacy/"
+explicit = true