4 files changed, 11 insertions, 4 deletions
diff --git a/tests/stress/dict_copy.py b/tests/stress/dict_copy.py
index 36db9bb7e..73d3a5b51 100644
--- a/tests/stress/dict_copy.py
+++ b/tests/stress/dict_copy.py
@@ -1,6 +1,6 @@
 # copying a large dictionary
 
-a = {i:2*i for i in range(1000)}
+a = {i: 2 * i for i in range(1000)}
 b = a.copy()
 for i in range(1000):
     print(i, b[i])
diff --git a/tests/stress/gc_trace.py b/tests/stress/gc_trace.py
index 72dc7b627..f952ad36a 100644
--- a/tests/stress/gc_trace.py
+++ b/tests/stress/gc_trace.py
@@ -12,6 +12,8 @@ gc.collect()
 print(lst)
 
 # test a deep object
-lst = [[[[[(i, j, k, l)] for i in range(3)] for j in range(3)] for k in range(3)] for l in range(3)]
+lst = [
+    [[[[(i, j, k, l)] for i in range(3)] for j in range(3)] for k in range(3)] for l in range(3)
+]
 gc.collect()
 print(lst)
diff --git a/tests/stress/recursion.py b/tests/stress/recursion.py
index 227f48396..c2d831bb8 100644
--- a/tests/stress/recursion.py
+++ b/tests/stress/recursion.py
@@ -1,6 +1,7 @@
 def foo():
     foo()
 
+
 try:
     foo()
 except RuntimeError:
diff --git a/tests/stress/recursive_gen.py b/tests/stress/recursive_gen.py
index 0e0d3914e..8c2139765 100644
--- a/tests/stress/recursive_gen.py
+++ b/tests/stress/recursive_gen.py
@@ -3,16 +3,20 @@
 # simple "yield from" recursion
 def gen():
     yield from gen()
+
+
 try:
     list(gen())
 except RuntimeError:
-    print('RuntimeError')
+    print("RuntimeError")
 
 # recursion via an iterator over a generator
 def gen2():
     for x in gen2():
         yield x
+
+
 try:
     next(gen2())
 except RuntimeError:
-    print('RuntimeError')
+    print("RuntimeError")