diff --git a/gseapy/__main__.py b/gseapy/__main__.py
index 9a9d68f..6782952 100644
--- a/gseapy/__main__.py
+++ b/gseapy/__main__.py
@@ -736,8 +736,7 @@ def add_gsva_parser(subparsers):
         dest="mx_diff",
         action="store_false",
         default=True,
-        help="When set, ES is calculated as the maximum distance of the random walk from 0. Default: False"
-              "Default: False",
+        help="When set, ES is calculated as the maximum distance of the random walk from 0. Default: False",
     )
 
     group_opt.add_argument(
@@ -749,8 +748,8 @@ def add_gsva_parser(subparsers):
         default="Gaussian",
         metavar="",
         choices=("Gaussian", "Poisson", "None"),
-        help="Gaussian is suitable when input expression values are continuous. " +\
-             "If input integer counts, then this argument should be set to 'Poisson'",
+        help="Gaussian is suitable when input expression values are continuous. "
+        + "If input integer counts, then this argument should be set to 'Poisson'",
     )
 
     group_opt.add_argument(
diff --git a/gseapy/gsea.py b/gseapy/gsea.py
index bf0cf7c..a8c7673 100644
--- a/gseapy/gsea.py
+++ b/gseapy/gsea.py
@@ -12,15 +12,9 @@
 import pandas as pd
 
 from gseapy.base import GSEAbase
-from gseapy.gse import (
-    Metric,
-    gsea_rs,
-    prerank2d_rs,
-    prerank_rs,
-)
+from gseapy.gse import Metric, gsea_rs, prerank2d_rs, prerank_rs
 from gseapy.parser import gsea_cls_parser
 from gseapy.plot import gseaplot
-from gseapy.utils import mkdirs
 
 # from memory_profiler import profile
 
diff --git a/tests/test_commands.py b/tests/test_commands.py
index 0a5c614..bd9386b 100644
--- a/tests/test_commands.py
+++ b/tests/test_commands.py
@@ -1,8 +1,8 @@
-from tempfile import NamedTemporaryFile, TemporaryDirectory, mkdtemp
+from tempfile import TemporaryDirectory, mkdtemp
 
 import pytest
 
-from gseapy.__init__ import enrich, enrichr, gsea, prerank, replot, ssgsea, gsva
+from gseapy.__init__ import enrich, enrichr, gsea, gsva, prerank, replot, ssgsea
 
 
 @pytest.fixture