diff --git a/setup.cfg b/setup.cfg
index 6d40a3c..94ee08d 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -3,3 +3,5 @@
 # Display summary info for (s)skipped, (X)xpassed, (x)xfailed, (f)failed and (e)errored tests
 # Skip doctest text files
 addopts = "-v" "-rsxXfE" "--doctest-glob="
+python_files = "tests/**/*.py"
+norecursedirs = ENV32 ENV64 src build dist .* *.egg
\ No newline at end of file