diff --git a/selectinf/learning/core.py b/selectinf/learning/core.py
index 7ad6b4b68..f58f6ad9d 100644
--- a/selectinf/learning/core.py
+++ b/selectinf/learning/core.py
@@ -20,6 +20,7 @@
 from .samplers import (normal_sampler,
                        split_sampler)
 from .learners import mixture_learner
+
 try:
     from .keras_fit import keras_fit
 except ImportError: