diff --git a/pyproject.toml b/pyproject.toml
index 8c1ec9869..0be949840 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,3 +31,7 @@ dependencies = [
 ]
 
 dynamic = ["version"]
+
+[tool.setuptools.packages.find]
+exclude = ["*tests*"]
+namespaces = false
diff --git a/setup.py b/setup.py
index b03184026..0f2e71b55 100755
--- a/setup.py
+++ b/setup.py
@@ -4,5 +4,4 @@
 
 setup(
     name="dask_expr",
-    packages=["dask_expr"],
 )