diff --git a/setup.cfg b/setup.cfg
index 726608377..328d14896 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -31,7 +31,9 @@ packages = find:
 include_package_data = True
 
 [options.packages.find]
-exclude = tests
+exclude =
+    tests
+    tests.*
 
 [options.entry_points]
 console_scripts =