diff --git a/fsl/tests/conftest.py b/conftest.py
similarity index 100%
rename from fsl/tests/conftest.py
rename to conftest.py
diff --git a/pyproject.toml b/pyproject.toml
index c93fae593c05d0acfcde038f423c19a5b60b355e..257b6f39ffa0a3ac1649d7c73b0d10d4b40ce89b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -82,10 +82,11 @@ fsl_apply_x5   = "fsl.scripts.fsl_apply_x5:main"
 
 [tool.setuptools.packages.find]
 include = ["fsl*"]
+exclude = ["fsl.tests*"]
 
 
 [tool.setuptools.package-data]
-fsl = ["fsl/tests/testdata/*", "utils/filetree/trees/*"]
+fsl = ["fsl/filetree/trees/*"]
 
 
 [tool.setuptools.dynamic]