diff --git a/bindings/python/tests/test_account.py b/bindings/python/tests/test_account.py
index 2ee636a7a9..7c1ab96668 100644
--- a/bindings/python/tests/test_account.py
+++ b/bindings/python/tests/test_account.py
@@ -5,12 +5,12 @@ from gnucash import Book, Account, Split, GncCommodity, GncNumeric, \
 
 from test_book import BookSession
 
-class AccountSession( BookSession ):
+class AccountSession(BookSession):
     def setUp(self):
         BookSession.setUp(self)
         self.account = Account(self.book)
 
-class TestAccount( AccountSession ):
+class TestAccount(AccountSession):
     def test_name(self):
         NAME = "Money"
         self.assertEqual( '', self.account.GetName() )
diff --git a/bindings/python/tests/test_book.py b/bindings/python/tests/test_book.py
index 80239ccbff..f2510144a2 100644
--- a/bindings/python/tests/test_book.py
+++ b/bindings/python/tests/test_book.py
@@ -2,14 +2,14 @@ from unittest import TestCase, main
 
 from gnucash import Session
 
-class BookSession( TestCase ):
+class BookSession(TestCase):
     def setUp(self):
         self.ses = Session()
         self.book = self.ses.get_book()
         self.table = self.book.get_table()
         self.currency = self.table.lookup('CURRENCY', 'EUR')
 
-class TestBook( BookSession ):
+class TestBook(BookSession):
     def test_markclosed(self):
         self.ses.end()
 
diff --git a/bindings/python/tests/test_business.py b/bindings/python/tests/test_business.py
index fa9604301a..0238d9d746 100644
--- a/bindings/python/tests/test_business.py
+++ b/bindings/python/tests/test_business.py
@@ -9,7 +9,7 @@ from gnucash.gnucash_business import Vendor, Employee, Customer, Job, Invoice, E
 
 from test_book import BookSession
 
-class BusinessSession( BookSession ):
+class BusinessSession(BookSession):
     def setUp(self):
         BookSession.setUp(self)
 
@@ -43,7 +43,7 @@ class BusinessSession( BookSession ):
         self.invoice.PostToAccount(self.receivable,
             self.today, self.today, "", True, False)
 
-class TestBusiness( BusinessSession ):
+class TestBusiness(BusinessSession):
     def test_equal(self):
         self.assertTrue( self.vendor.Equal( self.vendor.GetVendor() ) )
         self.assertTrue( self.customer.Equal( self.job.GetOwner() ) )
diff --git a/bindings/python/tests/test_commodity.py b/bindings/python/tests/test_commodity.py
index 4aa714638c..6eb2c0d2c8 100644
--- a/bindings/python/tests/test_commodity.py
+++ b/bindings/python/tests/test_commodity.py
@@ -2,7 +2,7 @@ from unittest import TestCase, main
 
 from gnucash import Session
 
-class CommoditySession( TestCase ):
+class CommoditySession(TestCase):
     def setUp(self):
         self.ses = Session()
         self.book = self.ses.get_book()
@@ -11,12 +11,12 @@ class CommoditySession( TestCase ):
     def tearDown(self):
         self.ses.end()
 
-class TestCommodity( CommoditySession ):
+class TestCommodity(CommoditySession):
     def test_iso_currency(self):
         eur = self.table.lookup('CURRENCY', 'EUR')
         self.assertIsNotNone(eur)
 
-class TestCommodityNamespace( CommoditySession ):
+class TestCommodityNamespace(CommoditySession):
     def test_namespaces(self):
         #print(self.table.__class__)
         namespace_names = self.table.get_namespaces()
diff --git a/bindings/python/tests/test_numeric.py b/bindings/python/tests/test_numeric.py
index 4ca39f7c7c..df16749fd9 100644
--- a/bindings/python/tests/test_numeric.py
+++ b/bindings/python/tests/test_numeric.py
@@ -3,7 +3,7 @@ from unittest import TestCase, main
 from gnucash import GncNumeric, GNC_DENOM_AUTO, GNC_HOW_DENOM_FIXED, \
     GNC_HOW_RND_NEVER, GNC_HOW_RND_FLOOR, GNC_HOW_RND_CEIL
 
-class TestGncNumeric( TestCase ):
+class TestGncNumeric(TestCase):
     def test_defaut(self):
         num = GncNumeric()
         self.assertEqual(str(num), "0/1")
diff --git a/bindings/python/tests/test_split.py b/bindings/python/tests/test_split.py
index f3da096a27..5b07fa7425 100644
--- a/bindings/python/tests/test_split.py
+++ b/bindings/python/tests/test_split.py
@@ -5,7 +5,7 @@ from unittest_support import *
 
 from test_book import BookSession
 
-class SplitSession( BookSession ):
+class SplitSession(BookSession):
     def setUp(self):
 
         BookSession.setUp(self)
@@ -14,7 +14,7 @@ class SplitSession( BookSession ):
     def tearDown(self):
         pass
 
-class TestSplit( SplitSession ):
+class TestSplit(SplitSession):
     def test_memo(self):
         MEMO = "cookie monster"
         self.assertEqual( '', self.split.GetMemo() )
diff --git a/bindings/python/tests/test_transaction.py b/bindings/python/tests/test_transaction.py
index 86776db64c..8a937a9b84 100644
--- a/bindings/python/tests/test_transaction.py
+++ b/bindings/python/tests/test_transaction.py
@@ -5,7 +5,7 @@ from unittest_support import *
 
 from test_book import BookSession
 
-class TransactionSession( BookSession ):
+class TransactionSession(BookSession):
     def setUp(self):
         self.domain1 = "gnc.engine"
         self.domain2 = "gnc.engine.scrub"
@@ -40,7 +40,7 @@ class TransactionSession( BookSession ):
         g_log_remove_handler(self.domain2, self.hdlr2)
         test_clear_error_list ()
 
-class TestTransaction( TransactionSession ):
+class TestTransaction(TransactionSession):
     def test_equal(self):
         TRANS = self.trans
         self.assertTrue( TRANS.Equal(self.trans, True, False, False, False) )