diff --git a/tests/funcs/test_functions.py b/tests/funcs/test_functions.py
index 4380e23f0b4e66b9075f5ee76ec5a86812126019..7d6db45553cb147ce1225dc7140cc026f9a30100 100644
--- a/tests/funcs/test_functions.py
+++ b/tests/funcs/test_functions.py
@@ -34,15 +34,17 @@ def field(data):
 
 
 def test_statPass():
-    data = pd.Series(0, index=pd.date_range('2000','2001',freq='1D'), name='data')
+    data = pd.Series(0, index=pd.date_range("2000", "2001", freq="1D"), name="data")
     noise = [-1, 1] * 10
     data[100:120] = noise
     data[200:210] = noise[:10]
     data = dios.DictOfSeries(data)
     flags = initFlagsLike(data)
-    data, flags = flagByStatLowPass(data, 'data', flags, np.std, '20D', 0.999, '5D', 0.999, 0, flag=BAD)
-    assert (flags['data'] == BAD).sum() == 21
-    assert (flags['data'][200:210] < BAD).all()
+    data, flags = flagByStatLowPass(
+        data, "data", flags, np.std, "20D", 0.999, "5D", 0.999, 0, flag=BAD
+    )
+    assert (flags["data"] == BAD).sum() == 21
+    assert (flags["data"][200:210] < BAD).all()
 
 
 def test_flagRange(data, field):