diff --git a/tests/run-tests b/tests/run-tests
index a2efede0ae..08a92a14fa 100755
--- a/tests/run-tests
+++ b/tests/run-tests
@@ -50,7 +50,10 @@ def convert_regex_escapes(line):
 
 
 def run_micropython(pyb, args, test_file, is_special=False):
-    special_tests = ('micropython/meminfo.py', 'basics/bytes_compare3.py', 'basics/builtin_help.py', 'thread/thread_exc2.py')
+    special_tests = (
+        'micropython/meminfo.py', 'basics/bytes_compare3.py',
+        'basics/builtin_help.py', 'thread/thread_exc2.py',
+    )
     if pyb is None:
         # run on PC
         if test_file.startswith(('cmdline/', 'feature_check/')) or test_file in special_tests:
@@ -477,7 +480,10 @@ def main():
                 test_dirs = ('basics', 'micropython', 'misc', 'extmod', 'wipy')
             else:
                 # run PC tests
-                test_dirs = ('basics', 'micropython', 'float', 'import', 'io', 'misc', 'stress', 'unicode', 'extmod', 'unix', 'cmdline')
+                test_dirs = (
+                    'basics', 'micropython', 'float', 'import', 'io', 'misc',
+                    'stress', 'unicode', 'extmod', 'unix', 'cmdline',
+                )
         else:
             # run tests from these directories
             test_dirs = args.test_dirs