diff --git a/src/diana/tests/testSgfParser.py b/src/diana/tests/testSgfParser.py
--- a/src/diana/tests/testSgfParser.py
+++ b/src/diana/tests/testSgfParser.py
@@ -6,88 +6,88 @@ import os
 
 from diana.sgfParser import strRowCol
 from diana.sgfParser.collection import Collection
-from diana.sgfParser.property import Property,DateProperty,DateException
-from diana.sgfParser.propValues import text,compose
+from diana.sgfParser.property import Property, DateProperty, DateException
+from diana.sgfParser.propValues import text, compose
 
 
-dataDir=os.path.join(os.path.dirname(__file__), "data")
+dataDir = os.path.join(os.path.dirname(__file__), "data")
 
 
 class TestUtils(TestCase):
 	def testTextPos(self):
-		s="abc\ndef\rgh\r\nij\n\rklmn"
-		rc=[
-			[1,2,3,4],
-			[1,2,3,4],
-			[1,2,3,4],
-			[1,2,3], [1], # don't care about LFCR, we unicode now
-			[1,2,3,4]
+		s = "abc\ndef\rgh\r\nij\n\rklmn"
+		rc = [
+			[1, 2, 3, 4],
+			[1, 2, 3, 4],
+			[1, 2, 3, 4],
+			[1, 2, 3], [1],  # don't care about LFCR, we unicode now
+			[1, 2, 3, 4]
 		]
-		res=chain((r+1,c) for (r,row) in enumerate(rc) for c in row)
-		for (i,(r,c)) in zip(range(len(s)+1), res):
+		res = chain((r+1, c) for (r, row) in enumerate(rc) for c in row)
+		for (i, (r, c)) in zip(range(len(s)+1), res):
 			self.assertEqual(strRowCol(s, i), (r, c))
 
 
 class TestProperty(TestCase):
 	def testName(self):
 		with self.assertRaises(AssertionError):
-			Property.create("[99]",0)
+			Property.create("[99]", 0)
 		with self.assertRaises(AssertionError):
-			Property.create("99[99]",0)
+			Property.create("99[99]", 0)
 
-		i,prop=Property.create("MN[99]",0)
-		self.assertNotEqual((i,prop), (0,None))
-		self.assertEqual((i,prop.name), (6,"MN"))
+		(i, prop) = Property.create("MN[99]", 0)
+		self.assertNotEqual((i, prop), (0, None))
+		self.assertEqual((i, prop.name), (6, "MN"))
 
 	def testText(self):
-		s=r"""[abc\
+		s = r"""[abc\
 def
 ghi]"""
-		self.assertEqual(text()(s,1)[1], "abcdef ghi")
-		self.assertEqual(text(False)(s,1)[1], "abcdef\nghi")
+		self.assertEqual(text()(s, 1)[1], "abcdef ghi")
+		self.assertEqual(text(False)(s, 1)[1], "abcdef\nghi")
 
-		s="""[m\\no\\\tpqr\\]\\\\]"""
-		self.assertEqual(text()(s,1)[1], "mno pqr]\\")
-		self.assertEqual(text(False)(s,1)[1], "mno pqr]\\")
+		s = """[m\\no\\\tpqr\\]\\\\]"""
+		self.assertEqual(text()(s, 1)[1], "mno pqr]\\")
+		self.assertEqual(text(False)(s, 1)[1], "mno pqr]\\")
 
-		s="""[abc:def]"""
-		parsed=compose(text(composed=True),text(composed=True))(s,1)
+		s = """[abc:def]"""
+		parsed = compose(text(composed=True), text(composed=True))(s, 1)
 		self.assertEqual(str(parsed[1]), "abc:def")
 
 
 class TestDateProperty(TestCase):
 	def testSingle(self):
-		self.assertEqual(DateProperty.parseSingle("2019","Y")[1], date(2019,1,1))
-		self.assertEqual(DateProperty.parseSingle("2019-06","YM")[1], date(2019,6,1))
-		self.assertEqual(DateProperty.parseSingle("2019-06-22","YMD")[1], date(2019,6,22))
-		d=date(2019,6,21)
-		self.assertEqual(DateProperty.parseSingle("22","D",d)[1], date(2019,6,22))
-		self.assertEqual(DateProperty.parseSingle("07-22","MD",d)[1], date(2019,7,22))
-		self.assertEqual(DateProperty.parseSingle("2020-07-22","YMD",d)[1], date(2020,7,22))
+		self.assertEqual(DateProperty.parseSingle("2019", "Y")[1], date(2019, 1, 1))
+		self.assertEqual(DateProperty.parseSingle("2019-06", "YM")[1], date(2019, 6, 1))
+		self.assertEqual(DateProperty.parseSingle("2019-06-22", "YMD")[1], date(2019, 6, 22))
+		d = date(2019, 6, 21)
+		self.assertEqual(DateProperty.parseSingle("22", "D", d)[1], date(2019, 6, 22))
+		self.assertEqual(DateProperty.parseSingle("07-22", "MD", d)[1], date(2019, 7, 22))
+		self.assertEqual(DateProperty.parseSingle("2020-07-22", "YMD", d)[1], date(2020, 7, 22))
 		with self.assertRaises(ValueError):
-			DateProperty.parseSingle("2019-31","YMD")
+			DateProperty.parseSingle("2019-31", "YMD")
 
 	def testParse(self):
-		self.assertEqual(DateProperty("1996-05,06").value, [date(1996,5,1),date(1996,6,1)])
-		self.assertEqual(DateProperty("1996-05-06,07,08").value, [date(1996,5,6),date(1996,5,7),date(1996,5,8)])
-		self.assertEqual(DateProperty("1996,1997").value, [date(1996,1,1),date(1997,1,1)])
-		self.assertEqual(DateProperty("1996-12-27,28,1997-01-03,04").value, [date(1996,12,27),date(1996,12,28),date(1997,1,3),date(1997,1,4)])
-		self.assertEqual(DateProperty("1997-05-05,1997-05-06").value, [date(1997,5,5),date(1997,5,6)])
-		self.assertEqual(DateProperty("Published on 1997-05-06").value, [date(1997,5,6)])
+		self.assertEqual(DateProperty("1996-05,06").value, [date(1996, 5, 1), date(1996, 6, 1)])
+		self.assertEqual(DateProperty("1996-05-06,07,08").value, [date(1996, 5, 6), date(1996, 5, 7), date(1996, 5, 8)])
+		self.assertEqual(DateProperty("1996,1997").value, [date(1996, 1, 1), date(1997, 1, 1)])
+		self.assertEqual(DateProperty("1996-12-27,28,1997-01-03,04").value, [date(1996, 12, 27), date(1996, 12, 28), date(1997, 1, 3), date(1997, 1, 4)])
+		self.assertEqual(DateProperty("1997-05-05,1997-05-06").value, [date(1997, 5, 5), date(1997, 5, 6)])
+		self.assertEqual(DateProperty("Published on 1997-05-06").value, [date(1997, 5, 6)])
 		with self.assertRaises(DateException):
 			DateProperty("unknown")
 
 
 class TestCollection(TestCase):
 	def testSubtrees(self):
-		c=Collection("""
+		c = Collection("""
 (;B[aa]
 	(;W[ab]PB[Some Black]PW[Some White];B[ac])
 	(;W[bb]PB[Other Black]PW[Other White])
 )""")
-		games=list(c.listGames())
+		games = list(c.listGames())
 
-		self.assertEqual(len(games),2)
+		self.assertEqual(len(games), 2)
 		self.assertRegex(games[0].export(), r"^\(;B\[aa]\n;(PB\[Some Black]|PW\[Some White]|W\[ab]){3}\n;B\[ac]\n\)\n$")
 		self.assertRegex(games[1].export(), r"^\(;B\[aa]\n;(PB\[Other Black]|PW\[Other White]|W\[bb]){3}\n\)\n$")
 
@@ -102,5 +102,6 @@ class TestCollection(TestCase):
 		with open(os.path.join(dataDir, "kogos.sgf")) as f:
 			Collection(f.read())
 
+
 if __name__ == '__main__':
 	unittest.main()