diff --git a/tests/extmod/re_finditer.py b/tests/extmod/re_finditer.py
index 6043a37e3f..4794ea61a0 100644
--- a/tests/extmod/re_finditer.py
+++ b/tests/extmod/re_finditer.py
@@ -5,21 +5,21 @@ except ImportError:
     print("SKIP")
     raise SystemExit
 
-ms = re.finditer(r'f[a-z]*', 'which foot or hand fell fastest')
+ms = re.finditer(r"f[a-z]*", "which foot or hand fell fastest")
 print(list(x.group(0) for x in ms))
 
-p = re.compile(r'f[a-z]*')
-ms = p.finditer('which foot or hand fell fastest')
+p = re.compile(r"f[a-z]*")
+ms = p.finditer("which foot or hand fell fastest")
 print(list(x.group(0) for x in ms))
 
-ms = p.finditer('which foot or hand fell fastest', 10)
+ms = p.finditer("which foot or hand fell fastest", 10)
 print(list(x.group(0) for x in ms))
 
-ms = p.finditer('which foot or hand fell fastest', 10, 21)
+ms = p.finditer("which foot or hand fell fastest", 10, 21)
 print(list(x.group(0) for x in ms))
 
-ms = re.finditer(r'\s+', 'which foot or hand fell fastest')
+ms = re.finditer(r"\s+", "which foot or hand fell fastest")
 print(list(x.group(0) for x in ms))
 
-ms = re.finditer(r'zz', 'which foot or hand fell fastest')
+ms = re.finditer(r"zz", "which foot or hand fell fastest")
 print(list(x.group(0) for x in ms))
diff --git a/tests/extmod/re_start_end_pos.py b/tests/extmod/re_start_end_pos.py
index f8405b7852..5330d1b54e 100644
--- a/tests/extmod/re_start_end_pos.py
+++ b/tests/extmod/re_start_end_pos.py
@@ -18,6 +18,7 @@ def print_groups(match):
     except IndexError:
         pass
 
+
 p = re.compile(r"o")
 m = p.match("dog")
 print_groups(m)
@@ -45,15 +46,14 @@ m = p.match("dog", 1, 1)
 print_groups(m)
 
 # Search also works
-print('--search')
+print("--search")
 
 p = re.compile(r"o")
-m = p.search('dog')
+m = p.search("dog")
 print_groups(m)
 
-m = p.search('dog', 1)
+m = p.search("dog", 1)
 print_groups(m)
 
-m = p.search('dog', 2)
+m = p.search("dog", 2)
 print_groups(m)
-