diff --git a/tests/test_io.py b/tests/test_io.py
index cfec71df..973388a5 100644
--- a/tests/test_io.py
+++ b/tests/test_io.py
@@ -6,7 +6,13 @@
 except ImportError:
     Path = None  # type: ignore
 
-from monty.io import FileLock, FileLockException, reverse_readfile, reverse_readline, zopen
+from monty.io import (
+    FileLock,
+    FileLockException,
+    reverse_readfile,
+    reverse_readline,
+    zopen,
+)
 
 test_dir = os.path.join(os.path.dirname(__file__), "test_files")
 
diff --git a/tests/test_shutil.py b/tests/test_shutil.py
index 27ef7cd5..ab4c99a3 100644
--- a/tests/test_shutil.py
+++ b/tests/test_shutil.py
@@ -5,7 +5,15 @@
 import unittest
 from gzip import GzipFile
 
-from monty.shutil import compress_dir, compress_file, copy_r, decompress_dir, decompress_file, gzip_dir, remove
+from monty.shutil import (
+    compress_dir,
+    compress_file,
+    copy_r,
+    decompress_dir,
+    decompress_file,
+    gzip_dir,
+    remove,
+)
 
 test_dir = os.path.join(os.path.dirname(__file__), "test_files")
 
diff --git a/tests/test_termcolor.py b/tests/test_termcolor.py
index 287c9b6e..9b9b7dae 100644
--- a/tests/test_termcolor.py
+++ b/tests/test_termcolor.py
@@ -6,7 +6,13 @@
 import sys
 import unittest
 
-from monty.termcolor import cprint, cprint_map, enable, get_terminal_size, stream_has_colours
+from monty.termcolor import (
+    cprint,
+    cprint_map,
+    enable,
+    get_terminal_size,
+    stream_has_colours,
+)
 
 
 class FuncTest(unittest.TestCase):