diff --git a/pungi/phases/createiso.py b/pungi/phases/createiso.py
index 96c92ce2..8bde4950 100644
--- a/pungi/phases/createiso.py
+++ b/pungi/phases/createiso.py
@@ -512,7 +512,7 @@ def prepare_iso(
     else:
         data = iso.get_graft_points(
             compose.paths.compose.topdir(),
-            [iso._paths_from_list(tree_dir, split_iso_data["files"]), iso_dir]
+            [iso._paths_from_list(tree_dir, split_iso_data["files"]), iso_dir],
         )
 
     if compose.conf["createiso_break_hardlinks"]:
diff --git a/pungi/phases/extra_isos.py b/pungi/phases/extra_isos.py
index 437375eb..4c68a8e6 100644
--- a/pungi/phases/extra_isos.py
+++ b/pungi/phases/extra_isos.py
@@ -199,7 +199,9 @@ def get_iso_contents(
             buildinstall_dir = os.path.join(buildinstall_dir, variant.uid)
 
         copy_boot_images(buildinstall_dir, iso_dir)
-        files = iso.get_graft_points(compose.paths.compose.topdir(), [buildinstall_dir, iso_dir])
+        files = iso.get_graft_points(
+            compose.paths.compose.topdir(), [buildinstall_dir, iso_dir]
+        )
 
         # We need to point efiboot.img to compose/ tree, because it was
         # modified in buildinstall phase and the file in work/ has different
@@ -215,19 +217,25 @@ def get_iso_contents(
 
         # Get packages...
         package_dir = compose.paths.compose.packages(arch, var)
-        for k, v in iso.get_graft_points(compose.paths.compose.topdir(), [package_dir]).items():
+        for k, v in iso.get_graft_points(
+            compose.paths.compose.topdir(), [package_dir]
+        ).items():
             files[os.path.join(var.uid, "Packages", k)] = v
 
         # Get repodata...
         tree_dir = compose.paths.compose.repository(arch, var)
         repo_dir = os.path.join(tree_dir, "repodata")
-        for k, v in iso.get_graft_points(compose.paths.compose.topdir(), [repo_dir]).items():
+        for k, v in iso.get_graft_points(
+            compose.paths.compose.topdir(), [repo_dir]
+        ).items():
             files[os.path.join(var.uid, "repodata", k)] = v
 
         if inherit_extra_files:
             # Get extra files...
             extra_files_dir = compose.paths.work.extra_files_dir(arch, var)
-            for k, v in iso.get_graft_points(compose.paths.compose.topdir(), [extra_files_dir]).items():
+            for k, v in iso.get_graft_points(
+                compose.paths.compose.topdir(), [extra_files_dir]
+            ).items():
                 files[os.path.join(var.uid, k)] = v
 
     extra_files_dir = compose.paths.work.extra_iso_extra_files_dir(arch, variant)
@@ -243,7 +251,9 @@ def get_iso_contents(
     )
 
     # Add extra files specific for the ISO
-    files.update(iso.get_graft_points(compose.paths.compose.topdir(), [extra_files_dir]))
+    files.update(
+        iso.get_graft_points(compose.paths.compose.topdir(), [extra_files_dir])
+    )
 
     gp = "%s-graft-points" % iso_dir
     iso.write_graft_points(gp, files, exclude=["*/lost+found", "*/boot.iso"])
diff --git a/tests/test_extra_isos_phase.py b/tests/test_extra_isos_phase.py
index c00ce3dc..83365140 100644
--- a/tests/test_extra_isos_phase.py
+++ b/tests/test_extra_isos_phase.py
@@ -665,8 +665,12 @@ class GetIsoContentsTest(helpers.PungiTestCase):
         six.assertCountEqual(
             self,
             ggp.call_args_list,
-            [mock.call(self.compose.paths.compose.topdir(),
-                       [os.path.join(self.topdir, x)]) for x in gp],
+            [
+                mock.call(
+                    self.compose.paths.compose.topdir(), [os.path.join(self.topdir, x)]
+                )
+                for x in gp
+            ],
         )
         self.assertEqual(len(wgp.call_args_list), 1)
         self.assertEqual(wgp.call_args_list[0][0][0], gp_file)
@@ -735,8 +739,12 @@ class GetIsoContentsTest(helpers.PungiTestCase):
         six.assertCountEqual(
             self,
             ggp.call_args_list,
-            [mock.call(self.compose.paths.compose.topdir(),
-                       [os.path.join(self.topdir, x)]) for x in gp],
+            [
+                mock.call(
+                    self.compose.paths.compose.topdir(), [os.path.join(self.topdir, x)]
+                )
+                for x in gp
+            ],
         )
         self.assertEqual(len(wgp.call_args_list), 1)
         self.assertEqual(wgp.call_args_list[0][0][0], gp_file)
@@ -801,8 +809,12 @@ class GetIsoContentsTest(helpers.PungiTestCase):
         six.assertCountEqual(
             self,
             ggp.call_args_list,
-            [mock.call(self.compose.paths.compose.topdir(),
-                       [os.path.join(self.topdir, x)]) for x in gp],
+            [
+                mock.call(
+                    self.compose.paths.compose.topdir(), [os.path.join(self.topdir, x)]
+                )
+                for x in gp
+            ],
         )
         self.assertEqual(len(wgp.call_args_list), 1)
         self.assertEqual(wgp.call_args_list[0][0][0], gp_file)
@@ -893,10 +905,13 @@ class GetIsoContentsTest(helpers.PungiTestCase):
         six.assertCountEqual(
             self,
             ggp.call_args_list,
-            [mock.call(self.compose.paths.compose.topdir(),
-                       [os.path.join(self.topdir, x)]) for x in gp]
-            + [mock.call(self.compose.paths.compose.topdir(),
-                         [bi_dir, iso_dir])],
+            [
+                mock.call(
+                    self.compose.paths.compose.topdir(), [os.path.join(self.topdir, x)]
+                )
+                for x in gp
+            ]
+            + [mock.call(self.compose.paths.compose.topdir(), [bi_dir, iso_dir])],
         )
         self.assertEqual(len(wgp.call_args_list), 1)
         self.assertEqual(wgp.call_args_list[0][0][0], gp_file)