diff --git a/pyproject.toml b/pyproject.toml
index 45776b55de8f4358efa6f9fb1b9bb1550ae84590..76a46a4eb4afec8011c531d969d4c8c0845d89c8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,6 +35,7 @@ test = [
 requires = [
     "setuptools>=69",
     "wheel",
+    "pybind11",
 ]
 build-backend = "setuptools.build_meta"