diff --git a/pyerrors/input/hadrons.py b/pyerrors/input/hadrons.py
index 0f967423..3d7ab99b 100644
--- a/pyerrors/input/hadrons.py
+++ b/pyerrors/input/hadrons.py
@@ -142,6 +142,8 @@ def read_DistillationContraction_hd5(path, ens_id, diagrams=["direct"], idl=None
     for explore_file in explore_path.iterdir():
         if explore_file.is_file():
             stem = explore_file.with_suffix("").with_suffix("").as_posix().split("/")[-1]
+        else:
+            continue
 
         file_list = []
         for dir in directories:
diff --git a/setup.py b/setup.py
index a06ceca9..3aa4d889 100644
--- a/setup.py
+++ b/setup.py
@@ -26,6 +26,7 @@ setup(name='pyerrors',
       packages=find_packages(),
       python_requires='>=3.7.0',
       install_requires=['numpy>=1.19', 'autograd>=1.5', 'numdifftools>=0.9.41', 'matplotlib>=3.5', 'scipy>=1.7', 'iminuit>=2.17', 'h5py>=3.7', 'lxml>=4.9', 'python-rapidjson>=1.9', 'pandas>=1.1'],
+      extras_require={'test': ['pytest', 'pytest-cov', 'pytest-benchmark']},
       classifiers=[
           'Development Status :: 5 - Production/Stable',
           'Intended Audience :: Science/Research',