diff --git a/README.rst b/README.rst
index 64a022f..f9ed603 100644
--- a/README.rst
+++ b/README.rst
@@ -9,25 +9,11 @@ pip install mds-cashbook-dataexchange
 
 Requires
 ========
-- Tryton 6.0
+- Tryton 7.0
 
 Changes
 =======
 
-*6.0.3 - 13.09.2022*
+*7.0.0 - 01.12.2023*
 
-- add: import of split-bookings
-- updt: transfers
-
-*6.0.2 - 05.09.2022*
-
-- category: qif-export
-- party, transactions: qif-import/export
-
-*6.0.1 - 31.08.2022*
-
-- add: qif - category - import
-
-*6.0.0 - 28.08.2022*
-
-- init
+- compatibility to Tryton 7.0
diff --git a/__init__.py b/__init__.py
index ca56a2a..eca81a7 100644
--- a/__init__.py
+++ b/__init__.py
@@ -7,9 +7,11 @@ from trytond.pool import Pool
 from .category import Category
 from .book import Book
 from .qiftool import QifTool
-from .qif_import_wiz import ImportQifWizard, ImportQifWizardStart, ImportQifWizardInfo
+from .qif_import_wiz import (
+    ImportQifWizard, ImportQifWizardStart, ImportQifWizardInfo)
 from .qif_export import QifCategoryExport, QifBookExport
 
+
 def register():
     Pool.register(
         QifTool,
diff --git a/book.py b/book.py
index c1c9036..392877e 100644
--- a/book.py
+++ b/book.py
@@ -3,7 +3,6 @@
 # The COPYRIGHT file at the top level of this repository contains the
 # full copyright notices and license terms.
 
-from trytond.transaction import Transaction
 from trytond.pool import Pool, PoolMeta
 
 
@@ -28,13 +27,13 @@ class Book(metaclass=PoolMeta):
         Book2 = pool.get('cashbook.book')
 
         qif_content = QifTool.split_by_type(qifdata)
-        if not 'Bank' in qif_content.keys():
+        if 'Bank' not in qif_content.keys():
             return None
 
-        (to_create, msg_list, fail_cnt) = QifTool.convert_transactions_to_create(
+        (to_create, msg_list, fail_cnt) = \
+            QifTool.convert_transactions_to_create(
                 book,
-                QifTool.qif_read_transactions(qif_content['Bank'])
-            )
+                QifTool.qif_read_transactions(qif_content['Bank']))
         if fail_cnt == 0:
             Book2.write(*[
                 [book],
diff --git a/category.py b/category.py
index 0f08960..3430c44 100644
--- a/category.py
+++ b/category.py
@@ -3,7 +3,6 @@
 # The COPYRIGHT file at the top level of this repository contains the
 # full copyright notices and license terms.
 
-from trytond.transaction import Transaction
 from trytond.pool import Pool, PoolMeta
 
 
@@ -18,8 +17,9 @@ class Category(metaclass=PoolMeta):
         Category2 = pool.get('cashbook.category')
         QifTool = pool.get('cashbook_dataexchange.qiftool')
 
-        categories = Category2.search([],
-            order=[('cattype', 'ASC'), ('rec_name', 'ASC')])
+        categories = Category2.search(
+                [],
+                order=[('cattype', 'ASC'), ('rec_name', 'ASC')])
 
         export = ['!Type:Cat']
         export.extend([QifTool.qif_export_category(x) for x in categories])
@@ -34,7 +34,7 @@ class Category(metaclass=PoolMeta):
         Category2 = pool.get('cashbook.category')
 
         type_data = QifTool.split_by_type(qifdata)
-        if not 'Cat' in type_data.keys():
+        if 'Cat' not in type_data.keys():
             return None
 
         to_create = QifTool.convert_categories_to_create(
diff --git a/qif_export.py b/qif_export.py
index b764cd7..c8066a6 100644
--- a/qif_export.py
+++ b/qif_export.py
@@ -8,7 +8,6 @@ from trytond.pool import Pool
 from slugify import slugify
 
 
-
 class QifCategoryExport(Report):
     __name__ = 'cashbook_dataexchange.rep_category'
 
@@ -40,7 +39,7 @@ class QifBookExport(Report):
         IrDate = pool.get('ir.date')
         Book = pool.get('cashbook.book')
 
-        books =  Book.search([('id', '=', data.get('id', -1))])
+        books = Book.search([('id', '=', data.get('id', -1))])
         if len(books) == 1:
             return (
                 'qif',
@@ -51,7 +50,7 @@ class QifBookExport(Report):
                     'book': books[0].name,
                     }, max_length=100, word_boundary=True, save_order=True),
                 )
-        else :
+        else:
             return (
                 'txt',
                 'not cashbook found',
diff --git a/qif_import_wiz.py b/qif_import_wiz.py
index a74b31f..d79f927 100644
--- a/qif_import_wiz.py
+++ b/qif_import_wiz.py
@@ -7,26 +7,26 @@ from trytond.transaction import Transaction
 from trytond.pool import Pool
 from trytond.model import ModelView, fields
 from trytond.wizard import Wizard, StateTransition, StateView, Button
-from trytond.transaction import Transaction
 from trytond.i18n import gettext
 from trytond.pyson import Eval, Bool
 from trytond.report import Report
-from decimal import Decimal
 
 
 class ImportQifWizardStart(ModelView):
     'Import QIF-File'
     __name__ = 'cashbook_dataexchange.qif_imp_wiz.start'
 
-    company = fields.Many2One(model_name='company.company',
+    company = fields.Many2One(
+        model_name='company.company',
         string="Company", required=True,
         states={'invisible': True})
-    book = fields.Many2One(string='Cashbook', readonly=True,
+    book = fields.Many2One(
+        string='Cashbook', readonly=True,
         model_name='cashbook.book',
         states={
-            'invisible': ~Bool(Eval('book')),
-        })
-    file_ = fields.Binary(string="QIF-File", required=True,
+            'invisible': ~Bool(Eval('book'))})
+    file_ = fields.Binary(
+        string="QIF-File", required=True,
         help='Quicken Interchange Format')
 
     @classmethod
@@ -40,15 +40,15 @@ class ImportQifWizardInfo(ModelView):
     'Import QIF-File'
     __name__ = 'cashbook_dataexchange.qif_imp_wiz.info'
 
-    company = fields.Many2One(model_name='company.company',
-        string="Company", required=True,
-        states={'invisible': True})
-    book = fields.Many2One(string='Cash Book', readonly=True,
-        model_name='cashbook.book',
+    company = fields.Many2One(
+        model_name='company.company', string="Company",
+        required=True, states={'invisible': True})
+    book = fields.Many2One(
+        string='Cash Book', readonly=True, model_name='cashbook.book',
         states={
-            'invisible': ~Bool(Eval('book')),
-        })
-    allowimport = fields.Boolean(string='Import Enabled',
+            'invisible': ~Bool(Eval('book'))})
+    allowimport = fields.Boolean(
+        string='Import Enabled',
         states={'invisible': True})
     info = fields.Text(string='Information', readonly=True)
 
@@ -60,21 +60,23 @@ class ImportQifWizard(Wizard):
     __name__ = 'cashbook_dataexchange.qif_imp_wiz'
 
     start_state = 'start'
-    start = StateView(model_name='cashbook_dataexchange.qif_imp_wiz.start', \
-        view='cashbook_dataexchange.qif_imp_wiz_start_form', \
+    start = StateView(
+        model_name='cashbook_dataexchange.qif_imp_wiz.start',
+        view='cashbook_dataexchange.qif_imp_wiz_start_form',
         buttons=[
             Button(string='Cancel', state='end', icon='tryton-cancel'),
-            Button(string='Read File', state='readf', icon='tryton-forward', default=True),
-            ])
-    showinfo = StateView(model_name='cashbook_dataexchange.qif_imp_wiz.info', \
-        view='cashbook_dataexchange.qif_imp_wiz_info_form', \
+            Button(
+                string='Read File', state='readf',
+                icon='tryton-forward', default=True)])
+    showinfo = StateView(
+        model_name='cashbook_dataexchange.qif_imp_wiz.info',
+        view='cashbook_dataexchange.qif_imp_wiz_info_form',
         buttons=[
             Button(string='Cancel', state='end', icon='tryton-cancel'),
-            Button(string='Import Data', state='importf', icon='tryton-import', default=True,
-                states={
-                    'readonly': Eval('allowimport', False) == False,
-                }),
-            ])
+            Button(
+                string='Import Data', state='importf',
+                icon='tryton-import', default=True,
+                states={'readonly': ~Eval('allowimport', False)})])
 
     readf = StateTransition()
     importf = StateTransition()
@@ -86,8 +88,7 @@ class ImportQifWizard(Wizard):
 
         values = {
             'company': Transaction().context.get('company'),
-            'book': None,
-            }
+            'book': None}
 
         model = context.get('active_model', '')
         if model == 'cashbook.book':
@@ -146,7 +147,8 @@ class ImportQifWizard(Wizard):
             # read file content, extract categories
             qif_content = QifTool.split_by_type(file_content)
             if 'Cat' in qif_content.keys():
-                to_create = QifTool.convert_categories_to_create(QifTool.qif_read_categories(qif_content['Cat']))
+                to_create = QifTool.convert_categories_to_create(
+                    QifTool.qif_read_categories(qif_content['Cat']))
 
                 in_categories = []
                 out_categories = []
@@ -156,43 +158,44 @@ class ImportQifWizard(Wizard):
 
                 self.showinfo.info = gettext(
                     'cashbook_dataexchange.msg_wiz_categories_found',
-                    categories = '\n'.join(
+                    categories='\n'.join(
                         [''] +
-                        ['%s (in)' % x for x in in_categories]+
+                        ['%s (in)' % x for x in in_categories] +
                         [''] +
                         ['%s (out)' % x for x in out_categories]
-                        )
-                    )
+                        ))
                 if len(to_create) > 0:
                     self.showinfo.allowimport = True
-            else :
-                self.showinfo.info = gettext('cashbook_dataexchange.msg_wiz_no_categories')
+            else:
+                self.showinfo.info = gettext(
+                    'cashbook_dataexchange.msg_wiz_no_categories')
         elif model == 'party.party':
             # read file content, extract parties
             qif_content = QifTool.split_by_type(file_content)
             if 'Bank' in qif_content.keys():
                 to_create = QifTool.convert_parties_to_create(
-                        QifTool.qif_read_transactions(qif_content['Bank'])
-                    )
+                        QifTool.qif_read_transactions(qif_content['Bank']))
                 self.showinfo.info = gettext(
                     'cashbook_dataexchange.msg_wiz_parties_found',
-                    numparties = len(to_create),
+                    numparties=len(to_create),
                     ) + '\n\n' + '\n'.join([x['name'] for x in to_create])
                 if len(to_create) > 0:
                     self.showinfo.allowimport = True
-            else :
-                self.showinfo.info = gettext('cashbook_dataexchange.msg_wiz_no_bank')
+            else:
+                self.showinfo.info = gettext(
+                    'cashbook_dataexchange.msg_wiz_no_bank')
         elif model == 'cashbook.book':
             info_lst = []
             # read file content, extract categories
             qif_content = QifTool.split_by_type(file_content)
             if 'Bank' in qif_content.keys():
-                (to_create, msg_list, fail_cnt) = QifTool.convert_transactions_to_create(
+                (to_create, msg_list, fail_cnt) = \
+                    QifTool.convert_transactions_to_create(
                         self.start.book,
-                        QifTool.qif_read_transactions(qif_content['Bank'])
-                    )
+                        QifTool.qif_read_transactions(qif_content['Bank']))
                 if len(msg_list) > 0:
-                    info_lst.append(gettext('cashbook_dataexchange.msg_wiz_transactions_error'))
+                    info_lst.append(gettext(
+                        'cashbook_dataexchange.msg_wiz_transactions_error'))
                     info_lst.append('')
 
                     short_lst = []
@@ -204,22 +207,29 @@ class ImportQifWizard(Wizard):
 
                 # count
                 if fail_cnt == 0:
-                    debit = sum([x['amount'] for x in to_create if x['bookingtype'] in ['out', 'mvout', 'spout']])
-                    credit = sum([x['amount'] for x in to_create if x['bookingtype'] in ['in', 'mvin', 'spin']])
+                    debit = sum([
+                        x['amount'] for x in to_create
+                        if x['bookingtype'] in ['out', 'mvout', 'spout']])
+                    credit = sum([
+                        x['amount'] for x in to_create
+                        if x['bookingtype'] in ['in', 'mvin', 'spin']])
                     balance = credit - debit
 
                     if len(msg_list) > 0:
                         msg_list.append('')
                     info_lst.append(gettext(
                         'cashbook_dataexchange.msg_wiz_transactions_found',
-                        quantity = len(to_create),
-                        balance = Report.format_currency(balance, None, self.start.book.currency),
-                        credit = Report.format_currency(credit, None, self.start.book.currency),
-                        debit = Report.format_currency(debit, None, self.start.book.currency),
-                        ))
+                        quantity=len(to_create),
+                        balance=Report.format_currency(
+                            balance, None, self.start.book.currency),
+                        credit=Report.format_currency(
+                            credit, None, self.start.book.currency),
+                        debit=Report.format_currency(
+                            debit, None, self.start.book.currency)))
                     self.showinfo.allowimport = True
-            else :
-                info_lst.append(gettext('cashbook_dataexchange.msg_wiz_no_bank'))
+            else:
+                info_lst.append(gettext(
+                    'cashbook_dataexchange.msg_wiz_no_bank'))
             self.showinfo.info = '\n'.join(info_lst)
 
         return 'showinfo'
@@ -241,14 +251,13 @@ class ImportQifWizard(Wizard):
 
         if model == 'cashbook.category':
             if file_content:
-                records = Category.create_from_qif(file_content)
+                Category.create_from_qif(file_content)
         elif model == 'cashbook.book':
             if file_content:
                 Book.create_from_qif(self.showinfo.book, file_content)
                 lines = Line.search([
                         ('cashbook.id', '=', self.showinfo.book.id),
-                        ('state', '=', 'edit'),
-                    ])
+                        ('state', '=', 'edit')])
                 if len(lines) > 0:
                     Line.wfcheck(lines)
         elif model == 'party.party':
@@ -261,4 +270,3 @@ class ImportQifWizard(Wizard):
         return 'end'
 
 # end ImportQifWizard
-
diff --git a/qiftool.py b/qiftool.py
index 2647767..b40ca40 100644
--- a/qiftool.py
+++ b/qiftool.py
@@ -26,11 +26,11 @@ class QifTool(Model):
         for line in lines:
             if line.startswith('!Type:'):
                 current_type = line[len('!Type:'):].strip()
-            else :
+            else:
                 if current_type is None:
                     continue
 
-                if not current_type in blocks.keys():
+                if current_type not in blocks.keys():
                     blocks[current_type] = []
                 blocks[current_type].append(line.strip())
 
@@ -82,7 +82,8 @@ class QifTool(Model):
             for line in booktxt.strip().split('\n'):
                 line_txt = line[1:].strip()
                 if line.startswith('D'):        # date
-                    booking['date'] = datetime.strptime(line_txt, '%d.%m.%Y').date()
+                    booking['date'] = datetime.strptime(
+                        line_txt, '%d.%m.%Y').date()
                 elif line.startswith('T'):      # total
                     booking['amount'] = cls.get_amount_from_txt(line_txt)
                 elif line.startswith('U'):      # total
@@ -103,24 +104,26 @@ class QifTool(Model):
                 elif line.startswith('L'):      # category, account
                     if line_txt.startswith('[') and line_txt.endswith(']'):
                         booking['account'] = line_txt[1:-1]
-                    else :
+                    else:
                         booking['category'] = line_txt
                 elif line.startswith('S'):      # split: category, account
                     if line_txt.startswith('[') and line_txt.endswith(']'):
                         booking['split'].append({
                             'account': line_txt[1:-1],
                             })
-                    else :
+                    else:
                         booking['split'].append({
                             'category': line_txt,
                             })
                 elif line.startswith('E'):      # split: memo
                     booking['split'][-1]['description'] = line_txt
                 elif line.startswith('$'):      # split: amount
-                    booking['split'][-1]['amount'] = cls.get_amount_from_txt(line_txt)
+                    booking['split'][-1]['amount'] = \
+                        cls.get_amount_from_txt(line_txt)
                 elif line.startswith('£'):      # split: amount
-                    booking['split'][-1]['amount'] = cls.get_amount_from_txt(line_txt)
-                else :
+                    booking['split'][-1]['amount'] = \
+                        cls.get_amount_from_txt(line_txt)
+                else:
                     raise ValueError('unknown line-code: %s' % (line))
             result.append(booking)
         return result
@@ -138,7 +141,7 @@ class QifTool(Model):
                 return amount
             elif line.bookingtype in ['out', 'spout', 'mvout']:
                 return amount * Decimal('-1.0')
-            else :
+            else:
                 raise ValueError('invalid bookingtype: %s' % line.bookingtype)
 
         for line in book.lines:
@@ -148,7 +151,10 @@ class QifTool(Model):
                 })
             # total
             result.append('T%(total)s' % {
-                'total': Report.format_number(get_amount_by_bookingstate(line.amount, line), None),
+                'total': Report.format_number(
+                    get_amount_by_bookingstate(line.amount, line),
+                    None,
+                    digits=book.currency.digits),
                 })
             # state
             result.append('C%(state)s' % {
@@ -164,8 +170,8 @@ class QifTool(Model):
                 if p_address:
                     if len(p_address.full_address.strip()) > 0:
                         result.append('A%(address)s' % {
-                            'address': p_address.full_address.replace('\n', ', ').strip(),
-                            })
+                            'address': p_address.full_address.replace(
+                                '\n', ', ').strip()})
             # category
             if line.category:
                 result.append('L%(category)s' % {
@@ -192,7 +198,10 @@ class QifTool(Model):
                         'memo': splitline.description.replace('\n', '; ')
                         })
                 result.append('$%(total)s' % {
-                    'total': Report.format_number(get_amount_by_bookingstate(splitline.amount, line), None),
+                    'total': Report.format_number(
+                        get_amount_by_bookingstate(splitline.amount, line),
+                        None,
+                        digits=book.currency.digits),
                     })
             result.append('^')
         return '\n'.join(result)
@@ -210,17 +219,15 @@ class QifTool(Model):
         if len(parties) == 0:
             msg_txt = gettext(
                 'cashbook_dataexchange.mds_import_party_notfound',
-                pname = partyname,
-                )
+                pname=partyname)
         elif len(parties) == 1:
             party_id = parties[0].id
-        else :
+        else:
             party_id = parties[0].id
             msg_txt = gettext(
                 'cashbook_dataexchange.mds_import_many_parties_found',
-                pname = partyname,
-                pname2 = parties[0].rec_name,
-                )
+                pname=partyname,
+                pname2=parties[0].rec_name)
         return (party_id, msg_txt)
 
     @classmethod
@@ -241,13 +248,13 @@ class QifTool(Model):
         elif len(books) == 0:
             msg_txt = gettext(
                 'cashbook_dataexchange.mds_import_book_notfound',
-                bookname = account_name,
+                bookname=account_name,
                 )
-        else :
+        else:
             msg_txt = gettext(
                 'cashbook_dataexchange.mds_import_many_books_found',
-                bookname1 = account_name,
-                bookname2 = books[0].rec_name,
+                bookname1=account_name,
+                bookname2=books[0].rec_name,
                 )
             book_obj = books[0]
         return (book_obj, msg_txt)
@@ -269,13 +276,13 @@ class QifTool(Model):
         elif len(categories) == 0:
             msg_txt = gettext(
                 'cashbook_dataexchange.mds_import_category_notfound',
-                catname = catname,
+                catname=catname,
                 )
-        else :
+        else:
             msg_txt = gettext(
                 'cashbook_dataexchange.mds_import_many_categories_found',
-                catname1 = catname,
-                catname2 = '%(name)s [%(type)s]' % {
+                catname1=catname,
+                catname2='%(name)s [%(type)s]' % {
                     'name': categories[0].rec_name,
                     'type': categories[0].cattype,
                     },
@@ -294,13 +301,13 @@ class QifTool(Model):
             """
             result = []
             for catname in catdict.keys():
-                if do_search == True:
+                if do_search is True:
                     c_lst = Category.search([
-                            ('cattype', '=', ctype),
-                            ('name', '=', catname),
-                            ('parent', '=', None) if parent is None else ('parent.id', '=', parent.id),
-                        ])
-                else :
+                        ('cattype', '=', ctype),
+                        ('name', '=', catname),
+                        ('parent', '=', None)
+                        if parent is None else ('parent.id', '=', parent.id)])
+                else:
                     c_lst = []
 
                 if len(c_lst) == 0:
@@ -312,13 +319,15 @@ class QifTool(Model):
                         cat1['parent'] = parent.id
 
                     if len(catdict[catname]['childs']) > 0:
-                        childs = get_create(ctype, catdict[catname]['childs'], None, False)
+                        childs = get_create(
+                            ctype, catdict[catname]['childs'], None, False)
                         if len(childs) > 0:
                             cat1['childs'] = [('create', childs)]
                     result.append(cat1)
-                else :
+                else:
                     if len(catdict[catname]['childs']) > 0:
-                        result.extend(get_create(ctype, catdict[catname]['childs'], c_lst[0], True))
+                        result.extend(get_create(
+                            ctype, catdict[catname]['childs'], c_lst[0], True))
             return result
         to_create = []
         for typ1 in ['in', 'out']:
@@ -343,8 +352,7 @@ class QifTool(Model):
                 if Party.search_count([
                         ('rec_name', 'ilike', '%%%(pname)s%%' % {
                             'pname': transaction['party'],
-                            })
-                    ]) == 0:
+                            })]) == 0:
                     to_create.append({
                         'name': transaction['party'],
                         'addresses': [('create', [{
@@ -361,15 +369,15 @@ class QifTool(Model):
         Line = Pool().get('cashbook.line')
 
         if Line.search_count([
-            ('cashbook.id', '=', book.id),
-            ('booktransf.id', '=', line['booktransf']),
-            ('date', '=', line['date']),
-            #('description', '=', line['description']),
-            ('amount', '=', line['amount']),
-            ('bookingtype', '=', line['bookingtype']),
-            ]) > 0:
+                ('cashbook.id', '=', book.id),
+                ('booktransf.id', '=', line['booktransf']),
+                ('date', '=', line['date']),
+                # ('description', '=', line['description']),
+                ('amount', '=', line['amount']),
+                ('bookingtype', '=', line['bookingtype']),
+                ]) > 0:
             return True
-        else :
+        else:
             return False
 
     @classmethod
@@ -382,7 +390,8 @@ class QifTool(Model):
         fail_cnt = 0
         category = account = None
         if cat_name is not None:
-            (category, msg_txt) = cls.get_category_by_name(book.company, cat_name)
+            (category, msg_txt) = cls.get_category_by_name(
+                book.company, cat_name)
             if category is None:
                 msg_list.append(msg_txt)
                 fail_cnt += 1
@@ -394,7 +403,8 @@ class QifTool(Model):
         return (category, account, msg_list, fail_cnt)
 
     @classmethod
-    def convert_transactions_to_create(cls, book, transactions, split2edit=True):
+    def convert_transactions_to_create(
+            cls, book, transactions, split2edit=True):
         """ convert read transactions to create-command
             split2edit: True = split-bookings are 'edit', False = dont change
         """
@@ -409,14 +419,16 @@ class QifTool(Model):
         msg_list = []
         fail_cnt = 0
         for transaction in transactions:
-            line = {x:transaction[x] for x in [
-                    'date', 'amount', 'description', 'state',
-                ] if x in transaction.keys()}
+            line = {
+                x: transaction[x]
+                for x in ['date', 'amount', 'description', 'state']
+                if x in transaction.keys()}
 
             if 'description' in line.keys():
                 line['description'] = updt_description(line['description'])
 
-            (category, account, msg_lst2, fail_cnt2) = cls.get_category_account(book, transaction)
+            (category, account, msg_lst2, fail_cnt2) = \
+                cls.get_category_account(book, transaction)
             msg_list.extend(msg_lst2)
             if fail_cnt2 > 0:
                 fail_cnt += fail_cnt2
@@ -441,7 +453,7 @@ class QifTool(Model):
                 if line['amount'] < Decimal('0.0'):
                     line['bookingtype'] = 'mvout'
                     line['amount'] = line['amount'].copy_negate()
-                else :
+                else:
                     line['bookingtype'] = 'mvin'
 
                 line['booktransf'] = account.id
@@ -452,34 +464,36 @@ class QifTool(Model):
                     del transaction['party']
                 line['description'] = '; '.join(descr_lst)
                 line['state'] = 'edit'
-                if cls.check_counter_transaction(book, line) == True:
+                if cls.check_counter_transaction(book, line) is True:
                     # counter-transaction already exists
                     continue
-            else :
+            else:
                 # transaction: no category, no account - ignore?
                 if line.get('amount', Decimal('0.0')) == Decimal('0.0'):
                     # no amount --> ignore!
-                    tr_info = {'trdate': '-', 'amount':'-'}
+                    tr_info = {'trdate': '-', 'amount': '-'}
                     if 'date' in transaction.keys():
-                        tr_info['trdate']  = Report.format_date(transaction['date'], None)
+                        tr_info['trdate'] = Report.format_date(
+                            transaction['date'], None)
                     if 'amount' in transaction.keys():
-                        tr_info['amount']  = Report.format_currency(
+                        tr_info['amount'] = Report.format_currency(
                             transaction['amount'],
                             None,
                             book.currency)
                     tr_info['descr'] = transaction.get('description', '-')
                     msg_list.append(gettext(
                         'cashbook_dataexchange.msg_ignore_null_booking',
-                        trinfo = '%(trdate)s, %(amount)s, %(descr)s' % tr_info,
+                        trinfo='%(trdate)s, %(amount)s, %(descr)s' % tr_info,
                         ))
                     continue
 
             # party
             if 'party' in transaction.keys():
-                (party_id, msg_txt) = cls.get_party_by_name(transaction['party'])
+                (party_id, msg_txt) = cls.get_party_by_name(
+                    transaction['party'])
                 if party_id is not None:
                     line['party'] = party_id
-                else :
+                else:
                     fail_cnt += 1
                 if msg_txt is not None:
                     msg_list.append(msg_txt)
@@ -496,28 +510,34 @@ class QifTool(Model):
 
             split_lines = []
             for sp_line in transaction['split']:
-                (category, account, msg_lst2, fail_cnt2) = cls.get_category_account(book, sp_line)
+                (category, account, msg_lst2, fail_cnt2) = \
+                    cls.get_category_account(book, sp_line)
                 msg_list.extend(msg_lst2)
                 if fail_cnt2 > 0:
                     fail_cnt += fail_cnt2
                     continue
 
                 split_line = {
-                    'amount': sp_line['amount'] \
-                        if line['bookingtype'].endswith('in') else sp_line['amount'].copy_negate(),
-                    'description': updt_description(sp_line.get('description', None)),
+                    'amount': sp_line['amount']
+                    if line['bookingtype'].endswith('in')
+                    else sp_line['amount'].copy_negate(),
+                    'description': updt_description(
+                        sp_line.get('description', None)),
                     }
 
                 if category:
                     # category match to bookingtype?
-                    if ((category.cattype == 'in') and line['bookingtype'].endswith('out')) or\
-                        ((category.cattype == 'out') and line['bookingtype'].endswith('in')):
+                    if ((category.cattype == 'in') and
+                            line['bookingtype'].endswith('out')) or \
+                            ((category.cattype == 'out') and
+                                line['bookingtype'].endswith('in')):
                         msg_list.append(gettext(
-                            'cashbook_dataexchange.mds_import_category_not_match',
-                            catname = '%s [%s]' % (category.rec_name, category.cattype),
-                            bktype = line['bookingtype'],
-                            data = str(transaction),
-                            ))
+                            'cashbook_dataexchange.' +
+                            'mds_import_category_not_match',
+                            catname='%s [%s]' % (
+                                category.rec_name, category.cattype),
+                            bktype=line['bookingtype'],
+                            data=str(transaction)))
                         fail_cnt += 1
                         continue
                     split_line['splittype'] = 'cat'
@@ -525,7 +545,7 @@ class QifTool(Model):
                 elif account:
                     split_line['splittype'] = 'tr'
                     split_line['booktransf'] = account.id
-                else :
+                else:
                     continue
 
                 split_lines.append(split_line)
@@ -533,7 +553,7 @@ class QifTool(Model):
             if len(split_lines) > 0:
                 line['splitlines'] = [('create', split_lines)]
 
-            if split2edit == True:
+            if split2edit is True:
                 if 'splitlines' in line.keys():
                     line['state'] = 'edit'
 
@@ -542,13 +562,13 @@ class QifTool(Model):
                 if line.get('category', None) is None:
                     msg_list.append(gettext(
                         'cashbook_dataexchange.mds_import_no_category',
-                        trdata = str(transaction)))
+                        trdata=str(transaction)))
                     fail_cnt += 1
             elif line['bookingtype'] in ['mvin', 'mvout']:
                 if line.get('booktransf', None) is None:
                     msg_list.append(gettext(
                         'cashbook_dataexchange.mds_import_no_account',
-                        trdata = str(transaction)))
+                        trdata=str(transaction)))
                     fail_cnt += 1
 
             to_create.append(line)
@@ -593,9 +613,10 @@ class QifTool(Model):
                     cattype = 'out'
                 elif line.startswith('I'):
                     cattype = 'in'
-                else :
+                else:
                     raise ValueError('invalid line: %s (%s)' % (line, cattxt))
-            categories[cattype] = add_category(categories[cattype], catname, cattype)
+            categories[cattype] = add_category(
+                categories[cattype], catname, cattype)
         return categories
 
     @classmethod
diff --git a/setup.py b/setup.py
index acb487d..e212258 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@
 """
 
 # Always prefer setuptools over distutils
-from setuptools import setup, find_packages
+from setuptools import setup
 # To use a consistent encoding
 from codecs import open
 from os import path
@@ -36,10 +36,10 @@ with open(path.join(here, 'versiondep.txt'), encoding='utf-8') as f:
         l2 = i.strip().split(';')
         if len(l2) < 4:
             continue
-        modversion[l2[0]] = {'min':l2[1], 'max':l2[2], 'prefix':l2[3]}
+        modversion[l2[0]] = {'min': l2[1], 'max': l2[2], 'prefix': l2[3]}
 
 # tryton-version
-major_version = 6
+major_version = 7
 minor_version = 0
 
 requires = ['python-slugify']
@@ -51,56 +51,59 @@ for dep in info.get('depends', []):
                 prefix = modversion[dep]['prefix']
 
             if len(modversion[dep]['max']) > 0:
-                requires.append('%s_%s >= %s, <= %s' %
-                    (prefix, dep, modversion[dep]['min'], modversion[dep]['max']))
-            else :
-                requires.append('%s_%s >= %s' %
-                    (prefix, dep, modversion[dep]['min']))
-        else :
-          requires.append('%s_%s >= %s.%s, < %s.%s' %
-                ('trytond', dep, major_version, minor_version,
+                requires.append('%s_%s >= %s, <= %s' % (
+                    prefix, dep, modversion[dep]['min'],
+                    modversion[dep]['max']))
+            else:
+                requires.append('%s_%s >= %s' % (
+                    prefix, dep, modversion[dep]['min']))
+        else:
+            requires.append('%s_%s >= %s.%s, < %s.%s' % (
+                'trytond', dep, major_version, minor_version,
                 major_version, minor_version + 1))
-requires.append('trytond >= %s.%s, < %s.%s' %
-        (major_version, minor_version, major_version, minor_version + 1))
+requires.append('trytond >= %s.%s, < %s.%s' % (
+    major_version, minor_version, major_version, minor_version + 1))
 
-setup(name='%s_%s' % (PREFIX, MODULE),
+setup(
+    name='%s_%s' % (PREFIX, MODULE),
     version=info.get('version', '0.0.1'),
     description='Tryton module to add import/export to cashbook.',
     long_description=long_description,
+    long_description_content_type='text/x-rst',
     url='https://www.m-ds.de/',
+    download_url='https://scmdev.m-ds.de/Tryton/Extra/cashbook_dataexchange',
     author='martin-data services',
     author_email='service@m-ds.de',
     license='GPL-3',
     classifiers=[
-    'Development Status :: 5 - Production/Stable',
-    'Environment :: Plugins',
-    'Framework :: Tryton',
-    'Intended Audience :: Developers',
-    'Intended Audience :: Customer Service',
-    'Intended Audience :: Information Technology',
-    'Intended Audience :: Financial and Insurance Industry',
-    'Topic :: Office/Business',
-    'Topic :: Office/Business :: Financial :: Accounting',
-    'Natural Language :: German',
-    'Natural Language :: English',
-    'Operating System :: OS Independent',
-    'License :: OSI Approved :: GNU General Public License (GPL)',
-    'Programming Language :: Python :: 3.7',
-    'Programming Language :: Python :: 3.8',
+        'Development Status :: 5 - Production/Stable',
+        'Environment :: Plugins',
+        'Framework :: Tryton',
+        'Intended Audience :: Developers',
+        'Intended Audience :: Customer Service',
+        'Intended Audience :: Information Technology',
+        'Intended Audience :: Financial and Insurance Industry',
+        'Topic :: Office/Business',
+        'Topic :: Office/Business :: Financial :: Accounting',
+        'Natural Language :: German',
+        'Natural Language :: English',
+        'Operating System :: OS Independent',
+        'License :: OSI Approved :: GNU General Public License (GPL)',
+        'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
     ],
-
     keywords='tryton cashbook import export',
     package_dir={'trytond.modules.%s' % MODULE: '.'},
     packages=[
         'trytond.modules.%s' % MODULE,
         ],
     package_data={
-        'trytond.modules.%s' % MODULE: (info.get('xml', [])
-            + ['tryton.cfg', 'locale/*.po', 'tests/*.py',
-                'report/*.fods', 'view/*.xml',
-                'versiondep.txt', 'README.rst']),
+        'trytond.modules.%s' % MODULE: (info.get('xml', []) + [
+            'tryton.cfg', 'locale/*.po', 'tests/*.py',
+            'report/*.fods', 'view/*.xml',
+            'versiondep.txt', 'README.rst']),
         },
-
     install_requires=requires,
     zip_safe=False,
     entry_points="""
diff --git a/tests/__init__.py b/tests/__init__.py
index 1ee073c..cf7e957 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -1,27 +1,4 @@
-# This file is part of Tryton.  The COPYRIGHT file at the top level of
-# this repository contains the full copyright notices and license terms.
-
-import trytond.tests.test_tryton
-import unittest
-
-from trytond.modules.cashbook_dataexchange.tests.test_category import CategoryTestCase
-from trytond.modules.cashbook_dataexchange.tests.test_party import PartyTestCase
-from trytond.modules.cashbook_dataexchange.tests.test_transaction import TransactionTestCase
-
-__all__ = ['suite']
-
-
-class CashbookExchangeTestCase(\
-    CategoryTestCase,\
-    PartyTestCase,\
-    TransactionTestCase,\
-    ):
-    'Test cashbook exchange module'
-    module = 'cashbook_dataexchange'
-
-# end CashbookExchangeTestCase
-
-def suite():
-    suite = trytond.tests.test_tryton.suite()
-    suite.addTests(unittest.TestLoader().loadTestsFromTestCase(CashbookExchangeTestCase))
-    return suite
+# -*- coding: utf-8 -*-
+# This file is part of the cashbook-module from m-ds for Tryton.
+# The COPYRIGHT file at the top level of this repository contains the
+# full copyright notices and license terms.
diff --git a/tests/test_category.py b/tests/category.py
similarity index 81%
rename from tests/test_category.py
rename to tests/category.py
index 6fed058..fdbd2a6 100644
--- a/tests/test_category.py
+++ b/tests/category.py
@@ -5,14 +5,13 @@
 
 from datetime import date
 from decimal import Decimal
-from trytond.tests.test_tryton import ModuleTestCase, with_transaction
+from trytond.tests.test_tryton import with_transaction
 from trytond.pool import Pool
 from trytond.transaction import Transaction
-from trytond.modules.cashbook.tests import CashbookTestCase
-from .qifdata import qif_category, qif_types
+from .qifdata import qif_types
 
 
-class CategoryTestCase(CashbookTestCase):
+class CategoryTestCase(object):
     'Test cashbook categoy module'
     module = 'cashbook_dataexchange'
 
@@ -22,13 +21,13 @@ class CategoryTestCase(CashbookTestCase):
         """
         pool = Pool()
         Category = pool.get('cashbook.category')
-        ImportWiz = pool.get('cashbook_dataexchange.qif_imp_wiz', type='wizard')
+        ImportWiz = pool.get(
+            'cashbook_dataexchange.qif_imp_wiz', type='wizard')
 
         company = self.prep_company()
         with Transaction().set_context({
-            'company': company.id,
-            'active_model': 'cashbook.category',
-            }):
+                'company': company.id,
+                'active_model': 'cashbook.category'}):
             (sess_id, start_state, end_state) = ImportWiz.create()
             w_obj = ImportWiz(sess_id)
             self.assertEqual(start_state, 'start')
@@ -49,8 +48,9 @@ class CategoryTestCase(CashbookTestCase):
 
             self.assertEqual(list(result.keys()), ['view'])
             self.assertEqual(result['view']['defaults']['company'], company.id)
-            self.assertEqual(result['view']['defaults']['info'],
-"""The following categories are now imported:\n
+            self.assertEqual(
+                result['view']['defaults']['info'],
+                """The following categories are now imported:\n
 Gehalt (in)
 Gehalt/Zulagen (in)
 
@@ -88,10 +88,14 @@ Lebensmittel (out)""")
             self.assertEqual(records[8].rec_name, 'Telefon/Telco2-Handy')
             self.assertEqual(records[9].rec_name, 'Telefon/Telco3')
             self.assertEqual(records[10].rec_name, 'Telekommunikation')
-            self.assertEqual(records[11].rec_name, 'Telekommunikation/Fernsehen')
-            self.assertEqual(records[12].rec_name, 'Telekommunikation/Online-Dienste')
-            self.assertEqual(records[13].rec_name, 'Telekommunikation/Telefon')
-            self.assertEqual(records[14].rec_name, 'Telekommunikation/Telefon/Test1')
+            self.assertEqual(
+                records[11].rec_name, 'Telekommunikation/Fernsehen')
+            self.assertEqual(
+                records[12].rec_name, 'Telekommunikation/Online-Dienste')
+            self.assertEqual(
+                records[13].rec_name, 'Telekommunikation/Telefon')
+            self.assertEqual(
+                records[14].rec_name, 'Telekommunikation/Telefon/Test1')
 
     @with_transaction()
     def test_category_create_by_qif_emptydb(self):
@@ -102,8 +106,7 @@ Lebensmittel (out)""")
 
         company = self.prep_company()
         with Transaction().set_context({
-            'company': company.id,
-            }):
+                'company': company.id}):
             records = Category.create_from_qif(qif_types)
 
             records = Category.search([], order=[('rec_name', 'ASC')])
@@ -120,10 +123,14 @@ Lebensmittel (out)""")
             self.assertEqual(records[8].rec_name, 'Telefon/Telco2-Handy')
             self.assertEqual(records[9].rec_name, 'Telefon/Telco3')
             self.assertEqual(records[10].rec_name, 'Telekommunikation')
-            self.assertEqual(records[11].rec_name, 'Telekommunikation/Fernsehen')
-            self.assertEqual(records[12].rec_name, 'Telekommunikation/Online-Dienste')
-            self.assertEqual(records[13].rec_name, 'Telekommunikation/Telefon')
-            self.assertEqual(records[14].rec_name, 'Telekommunikation/Telefon/Test1')
+            self.assertEqual(
+                records[11].rec_name, 'Telekommunikation/Fernsehen')
+            self.assertEqual(
+                records[12].rec_name, 'Telekommunikation/Online-Dienste')
+            self.assertEqual(
+                records[13].rec_name, 'Telekommunikation/Telefon')
+            self.assertEqual(
+                records[14].rec_name, 'Telekommunikation/Telefon/Test1')
 
             result = Category.export_as_qif()
             self.assertEqual(result, """!Type:Cat
@@ -183,8 +190,7 @@ I
 
         company = self.prep_company()
         with Transaction().set_context({
-            'company': company.id,
-            }):
+                'company': company.id}):
             cat1, = Category.create([{
                 'name': 'Telekommunikation',
                 'cattype': 'out',
@@ -199,7 +205,7 @@ I
             self.assertEqual(records[0].rec_name, 'Telekommunikation')
             self.assertEqual(records[1].rec_name, 'Telekommunikation/Telefon')
 
-            records1 = Category.create_from_qif(qif_types)
+            Category.create_from_qif(qif_types)
 
             records = Category.search([], order=[('rec_name', 'ASC')])
             self.assertEqual(len(records), 15)
@@ -215,10 +221,14 @@ I
             self.assertEqual(records[8].rec_name, 'Telefon/Telco2-Handy')
             self.assertEqual(records[9].rec_name, 'Telefon/Telco3')
             self.assertEqual(records[10].rec_name, 'Telekommunikation')
-            self.assertEqual(records[11].rec_name, 'Telekommunikation/Fernsehen')
-            self.assertEqual(records[12].rec_name, 'Telekommunikation/Online-Dienste')
-            self.assertEqual(records[13].rec_name, 'Telekommunikation/Telefon')
-            self.assertEqual(records[14].rec_name, 'Telekommunikation/Telefon/Test1')
+            self.assertEqual(
+                records[11].rec_name, 'Telekommunikation/Fernsehen')
+            self.assertEqual(
+                records[12].rec_name, 'Telekommunikation/Online-Dienste')
+            self.assertEqual(
+                records[13].rec_name, 'Telekommunikation/Telefon')
+            self.assertEqual(
+                records[14].rec_name, 'Telekommunikation/Telefon/Test1')
 
     @with_transaction()
     def test_qiftool_split_types(self):
@@ -228,18 +238,25 @@ I
 
         result = QifTool.split_by_type(qif_types)
         self.assertEqual(len(result.keys()), 2)
-        self.assertEqual(result['Cat'], 'NGehalt\nI\n^\nNGehalt:Zulagen\n'+
-            'I\n^\nNTelekommunikation\nE\n^\nNTelekommunikation:Online-Dienste\n'+
-            'E\n^\nNTelekommunikation:Telefon\nE\n^\nNTelekommunikation:Telefon:Test1\n'+
-            'E\n^\nNTelefon:Telco1-Tablett\n'+
-            'E\n^\nNTelefon:Telco2-Handy\nE\n^\nNTelefon:Telco3\nE\n^\n'+
-            'NTelekommunikation:Fernsehen\nE\n^\nNFernsehen:TV-Company\nE\n'+
+        self.assertEqual(
+            result['Cat'],
+            'NGehalt\nI\n^\nNGehalt:Zulagen\nI\n^\nNTelekommunikation' +
+            '\nE\n^\nNTelekommunikation:Online-Dienste\n' +
+            'E\n^\nNTelekommunikation:Telefon\nE\n^\nN' +
+            'Telekommunikation:Telefon:Test1\n' +
+            'E\n^\nNTelefon:Telco1-Tablett\n' +
+            'E\n^\nNTelefon:Telco2-Handy\nE\n^\nNTelefon:Telco3\nE\n^\n' +
+            'NTelekommunikation:Fernsehen\nE\n^\nNFernsehen:TV-Company\nE\n' +
             '^\nNFernsehen:GEZ\nE\n^\nNLebensmittel\nE\n^')
-        self.assertEqual(result['Bank'], 'D04.12.2013\nT7,12\nCX\nPOpening Balance\n'+
-            'L[Bargeld]\n^\nD05.12.2013\nCX\nM05.12/06.42UHR TT TELTOW\nT-29,00\n'+
-            'PGA NR00002168 BLZ10000000 0\nL[S-Giro]\n^\nD05.12.2013\nCX\nMsome food\n'+
-            'T-56,37\nPFoodshop Zehlendorf\nLLebensmittel\n^\nD06.12.2013\nCX\n'+
-            'Mreturn of bottles\nT1,45\nPFoodshop Zehlendorf\nLLebensmittel\n^\n')
+        self.assertEqual(
+            result['Bank'],
+            'D04.12.2013\nT7,12\nCX\n' +
+            'POpening Balance\nL[Bargeld]\n^\nD05.12.2013\nCX\nM05.12/' +
+            '06.42UHR TT TELTOW\nT-29,00\n' +
+            'PGA NR00002168 BLZ10000000 0\nL[S-Giro]\n^\nD05.12.2013' +
+            '\nCX\nMsome food\nT-56,37\nPFoodshop Zehlendorf\n' +
+            'LLebensmittel\n^\nD06.12.2013\nCX\nMreturn of bottles\n' +
+            'T1,45\nPFoodshop Zehlendorf\nLLebensmittel\n^\n')
 
     @with_transaction()
     def test_qiftool_convert_transactions(self):
@@ -253,8 +270,7 @@ I
 
         company = self.prep_company()
         with Transaction().set_context({
-            'company': company.id,
-            }):
+                'company': company.id}):
             types = self.prep_type()
             books = Book.create([{
                 'name': 'Cash Book',
@@ -263,7 +279,6 @@ I
                 'currency': company.currency.id,
                 'number_sequ': self.prep_sequence().id,
                 'start_date': date(2010, 1, 1),
-                'start_balance': Decimal('0.0'),
                 }, {
                 'name': 'S-Giro',
                 'btype': types.id,
@@ -271,7 +286,6 @@ I
                 'currency': company.currency.id,
                 'number_sequ': self.prep_sequence().id,
                 'start_date': date(2010, 1, 1),
-                'start_balance': Decimal('0.0'),
                 }, {
                 'name': 'Bargeld',
                 'btype': types.id,
@@ -279,7 +293,6 @@ I
                 'currency': company.currency.id,
                 'number_sequ': self.prep_sequence().id,
                 'start_date': date(2010, 1, 1),
-                'start_balance': Decimal('0.0'),
                 }])
             self.assertEqual(books[0].name, 'Cash Book')
             self.assertEqual(books[1].name, 'S-Giro')
@@ -316,17 +329,21 @@ I
                 'company': company.id,
                 }])
 
-            tr_list = QifTool.qif_read_transactions('D04.12.2013\nT7,12\nCX\n'+
-                'POpening Balance\nL[Bargeld]\n^\nD05.12.2013\nCX\n'+
-                'M05.12/06.42UHR TT TELTOW\nT-29,00\nPGA NR00002168 BLZ10000000 0\n'+
-                'L[S-Giro]\n^\nD05.12.2013\nCX\nMsome food\nT-56,37\n'+
-                'PFoodshop Zehlendorf\nLLebensmittel\n^\nD22.10.2020\n'+
-                'CX\nMLebensmittel\nT-55,84\nPreal,- Teltow\nLLebensmittel\n'+
-                'SLebensmittel\nELebensmittel\n$-49,36\nSKosmetik\nEKlopapier\n'+
-                '$-2,99\nSHaushaltschemie\nESagrotan\n$-3,49\n'+
+            tr_list = QifTool.qif_read_transactions(
+                'D04.12.2013\nT7,12\nCX\n' +
+                'POpening Balance\nL[Bargeld]\n^\nD05.12.2013\nCX\n' +
+                'M05.12/06.42UHR TT TELTOW\nT-29,00\nPGA NR00002168 ' +
+                'BLZ10000000 0\n' +
+                'L[S-Giro]\n^\nD05.12.2013\nCX\nMsome food\nT-56,37\n' +
+                'PFoodshop Zehlendorf\nLLebensmittel\n^\nD22.10.2020\n' +
+                'CX\nMLebensmittel\nT-55,84\nPreal,- Teltow\nLLebensmittel\n' +
+                'SLebensmittel\nELebensmittel\n$-49,36\nSKosmetik\n' +
+                'EKlopapier\n' +
+                '$-2,99\nSHaushaltschemie\nESagrotan\n$-3,49\n' +
                 'S[S-Giro]\nEtransfer out\n$-3,49\n^\n')
 
-            (to_create, msg_txt, fail_cnt) = QifTool.convert_transactions_to_create(books[0], tr_list)
+            (to_create, msg_txt, fail_cnt) = \
+                QifTool.convert_transactions_to_create(books[0], tr_list)
             self.assertEqual(msg_txt, [])
             self.assertEqual(to_create, [{
                     'date': date(2013, 12, 4),
@@ -338,11 +355,12 @@ I
                 }, {
                     'date': date(2013, 12, 5),
                     'amount': Decimal('29.00'),
-                    'description': '05.12/06.42UHR TT TELTOW',
                     'state': 'edit',
                     'bookingtype': 'mvout',
                     'booktransf': books[1].id,
-                    'description': 'GA NR00002168 BLZ10000000 0; 05.12/06.42UHR TT TELTOW',
+                    'description':
+                        'GA NR00002168 BLZ10000000 0; 05.12/06.42UHR ' +
+                        'TT TELTOW',
                 }, {
                     'date': date(2013, 12, 5),
                     'amount': Decimal('56.37'),
@@ -380,8 +398,7 @@ I
                                 'amount': Decimal('3.49'),
                                 'description': 'transfer out',
                                 'booktransf': books[1].id,
-                            }],
-                        )],
+                            }])],
                 }])
         Book.write(*[
             [books[0]],
@@ -397,13 +414,15 @@ I
         """
         QifTool = Pool().get('cashbook_dataexchange.qiftool')
 
-        result = QifTool.qif_read_transactions('D04.12.2013\nT7,12\nCX\n'+
-            'POpening Balance\nL[Bargeld]\n^\nD05.12.2013\nCX\n'+
-            'M05.12/06.42UHR TT TELTOW\nT290,00\nPGA NR00002168 BLZ10000000 0\n'+
-            'L[S-Giro]\n^\nD05.12.2013\nCX\nMsome food\nT-56,37\n'+
-            'PFoodshop Zehlendorf\nLLebensmittel\n^\nD22.10.2020\n'+
-            'CX\nMLebensmittel\nT-55,84\nPreal,- Teltow\nLLebensmittel\n'+
-            'SLebensmittel\nELebensmittel\n$-49,36\nSKosmetik\nEKlopapier\n'+
+        result = QifTool.qif_read_transactions(
+            'D04.12.2013\nT7,12\nCX\n' +
+            'POpening Balance\nL[Bargeld]\n^\nD05.12.2013\nCX\n' +
+            'M05.12/06.42UHR TT TELTOW\nT290,00\nPGA ' +
+            'NR00002168 BLZ10000000 0\n' +
+            'L[S-Giro]\n^\nD05.12.2013\nCX\nMsome food\nT-56,37\n' +
+            'PFoodshop Zehlendorf\nLLebensmittel\n^\nD22.10.2020\n' +
+            'CX\nMLebensmittel\nT-55,84\nPreal,- Teltow\nLLebensmittel\n' +
+            'SLebensmittel\nELebensmittel\n$-49,36\nSKosmetik\nEKlopapier\n' +
             '$-2,99\nSHaushaltschemie\nESagrotan\n$-3,49\n^\n')
         self.assertEqual(result, [{
                 'split': [],
@@ -456,8 +475,10 @@ I
         """
         QifTool = Pool().get('cashbook_dataexchange.qiftool')
 
-        result = QifTool.qif_read_categories('NGehalt\nI\n^\nNGehalt:Zulagen\nI\n^'+
-            'NTelekommunikation\nE\n^\nNTelekommunikation:Online-Dienste\nE\n^')
+        result = QifTool.qif_read_categories(
+            'NGehalt\nI\n^\nNGehalt:Zulagen\nI\n^' +
+            'NTelekommunikation\nE\n^\nNTelekommunikation:' +
+            'Online-Dienste\nE\n^')
         self.assertEqual(result, {
             'in': {
                 'Gehalt': {
diff --git a/tests/test_party.py b/tests/party.py
similarity index 79%
rename from tests/test_party.py
rename to tests/party.py
index a315e7b..4a6f113 100644
--- a/tests/test_party.py
+++ b/tests/party.py
@@ -3,15 +3,13 @@
 # The COPYRIGHT file at the top level of this repository contains the
 # full copyright notices and license terms.
 
-from datetime import date
-from decimal import Decimal
-from trytond.tests.test_tryton import ModuleTestCase, with_transaction
+from trytond.tests.test_tryton import with_transaction
 from trytond.pool import Pool
 from trytond.transaction import Transaction
 from .qifdata import qif_types
 
 
-class PartyTestCase(ModuleTestCase):
+class PartyTestCase(object):
     'Test cashbook party module'
     module = 'cashbook_dataexchange'
 
@@ -21,13 +19,13 @@ class PartyTestCase(ModuleTestCase):
         """
         pool = Pool()
         Party = pool.get('party.party')
-        ImportWiz = pool.get('cashbook_dataexchange.qif_imp_wiz', type='wizard')
+        ImportWiz = pool.get(
+            'cashbook_dataexchange.qif_imp_wiz', type='wizard')
 
         company = self.prep_company()
         with Transaction().set_context({
-            'company': company.id,
-            'active_model': 'party.party',
-            }):
+                  'company': company.id,
+                  'active_model': 'party.party'}):
             (sess_id, start_state, end_state) = ImportWiz.create()
             w_obj = ImportWiz(sess_id)
             self.assertEqual(start_state, 'start')
@@ -48,8 +46,9 @@ class PartyTestCase(ModuleTestCase):
 
             self.assertEqual(list(result.keys()), ['view'])
             self.assertEqual(result['view']['defaults']['company'], company.id)
-            self.assertEqual(result['view']['defaults']['info'],
-"""The following 3 parties are now imported:\n
+            self.assertEqual(
+                result['view']['defaults']['info'],
+                """The following 3 parties are now imported:\n
 Opening Balance
 GA NR00002168 BLZ10000000 0
 Foodshop Zehlendorf""")
@@ -64,7 +63,8 @@ Foodshop Zehlendorf""")
             self.assertEqual(len(records), 4)
 
             self.assertEqual(records[0].rec_name, 'Foodshop Zehlendorf')
-            self.assertEqual(records[1].rec_name, 'GA NR00002168 BLZ10000000 0')
+            self.assertEqual(
+                records[1].rec_name, 'GA NR00002168 BLZ10000000 0')
             self.assertEqual(records[2].rec_name, 'm-ds')
             self.assertEqual(records[3].rec_name, 'Opening Balance')
 
diff --git a/tests/test_module.py b/tests/test_module.py
new file mode 100644
index 0000000..42fe0a0
--- /dev/null
+++ b/tests/test_module.py
@@ -0,0 +1,24 @@
+# -*- coding: utf-8 -*-
+# This file is part of the cashbook-module from m-ds for Tryton.
+# The COPYRIGHT file at the top level of this repository contains the
+# full copyright notices and license terms.
+
+
+from trytond.modules.cashbook.tests.test_module import CashbookTestCase
+from .category import CategoryTestCase
+from .party import PartyTestCase
+from .transaction import TransactionTestCase
+
+
+class CashbookExchangeTestCase(
+        CashbookTestCase,
+        CategoryTestCase,
+        PartyTestCase,
+        TransactionTestCase):
+    'Test cashbook exchange module'
+    module = 'cashbook_dataexchange'
+
+# end CashbookExchangeTestCase
+
+
+del CashbookTestCase
diff --git a/tests/test_transaction.py b/tests/transaction.py
similarity index 73%
rename from tests/test_transaction.py
rename to tests/transaction.py
index ea4c8e0..b4448cf 100644
--- a/tests/test_transaction.py
+++ b/tests/transaction.py
@@ -5,13 +5,13 @@
 
 from datetime import date
 from decimal import Decimal
-from trytond.tests.test_tryton import ModuleTestCase, with_transaction
+from trytond.tests.test_tryton import with_transaction
 from trytond.pool import Pool
 from trytond.transaction import Transaction
 from .qifdata import qif_types
 
 
-class TransactionTestCase(ModuleTestCase):
+class TransactionTestCase(object):
     'Test cashbook transaction module'
     module = 'cashbook_dataexchange'
 
@@ -26,8 +26,7 @@ class TransactionTestCase(ModuleTestCase):
 
         company = self.prep_company()
         with Transaction().set_context({
-            'company': company.id,
-            }):
+                'company': company.id}):
             types = self.prep_type()
             books = Book.create([{
                 'name': 'Cash Book',
@@ -36,7 +35,6 @@ class TransactionTestCase(ModuleTestCase):
                 'currency': company.currency.id,
                 'number_sequ': self.prep_sequence().id,
                 'start_date': date(2010, 1, 1),
-                'start_balance': Decimal('0.0'),
                 }, {
                 'name': 'S-Giro',
                 'btype': types.id,
@@ -44,7 +42,6 @@ class TransactionTestCase(ModuleTestCase):
                 'currency': company.currency.id,
                 'number_sequ': self.prep_sequence().id,
                 'start_date': date(2010, 1, 1),
-                'start_balance': Decimal('0.0'),
                 }])
 
             Book.write(*[
@@ -52,21 +49,24 @@ class TransactionTestCase(ModuleTestCase):
                 {
                     'lines': [('create', [{
                         'date': date(2022, 6, 1),
-                        'bookingtype':'mvout',
+                        'bookingtype': 'mvout',
                         'amount': Decimal('10.0'),
                         'booktransf': books[1].id,
                         'description': 'transfer',
                         }])],
                 }])
             self.assertEqual(len(books[0].lines), 1)
-            self.assertEqual(books[0].lines[0].rec_name,
+            self.assertEqual(
+                books[0].lines[0].rec_name,
                 '06/01/2022|to|-10.00 usd|transfer [S-Giro | 0.00 usd | Open]')
             self.assertEqual(len(books[1].lines), 0)
 
             Line.wfcheck(books[0].lines)
             self.assertEqual(len(books[1].lines), 1)
-            self.assertEqual(books[1].lines[0].rec_name,
-                '06/01/2022|from|10.00 usd|transfer [Cash Book | -10.00 usd | Open]')
+            self.assertEqual(
+                books[1].lines[0].rec_name,
+                '06/01/2022|from|10.00 usd|transfer [Cash Book ' +
+                '| -10.00 usd | Open]')
 
             self.assertEqual(QifTool.check_counter_transaction(books[1], {
                     'booktransf': books[0].id,
@@ -84,13 +84,13 @@ class TransactionTestCase(ModuleTestCase):
         Party = pool.get('party.party')
         Category = pool.get('cashbook.category')
         Book = pool.get('cashbook.book')
-        ImportWiz = pool.get('cashbook_dataexchange.qif_imp_wiz', type='wizard')
+        ImportWiz = pool.get(
+            'cashbook_dataexchange.qif_imp_wiz', type='wizard')
 
         company = self.prep_company()
         with Transaction().set_context({
-            'company': company.id,
-            'active_model': 'cashbook.book',
-            }):
+                'company': company.id,
+                'active_model': 'cashbook.book'}):
             types = self.prep_type()
             books = Book.create([{
                 'name': 'Cash Book',
@@ -99,7 +99,6 @@ class TransactionTestCase(ModuleTestCase):
                 'currency': company.currency.id,
                 'number_sequ': self.prep_sequence().id,
                 'start_date': date(2010, 1, 1),
-                'start_balance': Decimal('0.0'),
                 }, {
                 'name': 'S-Giro',
                 'btype': types.id,
@@ -107,7 +106,6 @@ class TransactionTestCase(ModuleTestCase):
                 'currency': company.currency.id,
                 'number_sequ': self.prep_sequence().id,
                 'start_date': date(2010, 1, 1),
-                'start_balance': Decimal('0.0'),
                 }, {
                 'name': 'Bargeld',
                 'btype': types.id,
@@ -115,18 +113,17 @@ class TransactionTestCase(ModuleTestCase):
                 'currency': company.currency.id,
                 'number_sequ': self.prep_sequence().id,
                 'start_date': date(2010, 1, 1),
-                'start_balance': Decimal('0.0'),
                 }])
 
             Party.create([{
                 'name': 'GA NR00002168 BLZ10000000 0',
-                'addresses':[('create', [{}])],
+                'addresses': [('create', [{}])],
                 }, {
                 'name': 'Foodshop Zehlendorf',
-                'addresses':[('create', [{}])],
+                'addresses': [('create', [{}])],
                 }, {
                 'name': 'Opening Balance',
-                'addresses':[('create', [{}])],
+                'addresses': [('create', [{}])],
                 }])
 
             Category.create([{
@@ -156,8 +153,9 @@ class TransactionTestCase(ModuleTestCase):
 
             self.assertEqual(list(result.keys()), ['view'])
             self.assertEqual(result['view']['defaults']['company'], company.id)
-            self.assertEqual(result['view']['defaults']['info'],
-"""The following transactionen are now imported:
+            self.assertEqual(
+                result['view']['defaults']['info'],
+                """The following transactionen are now imported:
 Credit: usd7.12
 Debit: usd83.92
 Balance: -usd76.80
@@ -174,10 +172,20 @@ Number of transactions: 4""")
 
             self.assertEqual(len(books[0].lines), 4)
 
-            self.assertEqual(books[0].lines[0].rec_name, '12/04/2013|from|7.12 usd|Opening Balance [Bargeld | -7.12 usd | Open]')
-            self.assertEqual(books[0].lines[1].rec_name, '12/05/2013|to|-29.00 usd|GA NR00002168 BLZ10000000 0; 05.12/06.42 [S-Giro | 29.00 usd | Open]')
-            self.assertEqual(books[0].lines[2].rec_name, '12/05/2013|Exp|-56.37 usd|some food [Lebensmittel]')
-            self.assertEqual(books[0].lines[3].rec_name, '12/06/2013|Exp|1.45 usd|return of bottles [Lebensmittel]')
+            self.assertEqual(
+                books[0].lines[0].rec_name,
+                '12/04/2013|from|7.12 usd|Opening Balance ' +
+                '[Bargeld | -7.12 usd | Open]')
+            self.assertEqual(
+                books[0].lines[1].rec_name,
+                '12/05/2013|to|-29.00 usd|GA NR00002168 BLZ10000000 ' +
+                '0; 05.12/06.42 [S-Giro | 29.00 usd | Open]')
+            self.assertEqual(
+                books[0].lines[2].rec_name,
+                '12/05/2013|Exp|-56.37 usd|some food [Lebensmittel]')
+            self.assertEqual(
+                books[0].lines[3].rec_name,
+                '12/06/2013|Exp|1.45 usd|return of bottles [Lebensmittel]')
 
             self.assertEqual(Book.export_as_qif(books[0]), """!Type:Bank
 D12/04/2013
@@ -216,13 +224,13 @@ Mreturn of bottles
         Party = pool.get('party.party')
         Category = pool.get('cashbook.category')
         Book = pool.get('cashbook.book')
-        ImportWiz = pool.get('cashbook_dataexchange.qif_imp_wiz', type='wizard')
+        ImportWiz = pool.get(
+            'cashbook_dataexchange.qif_imp_wiz', type='wizard')
 
         company = self.prep_company()
         with Transaction().set_context({
-            'company': company.id,
-            'active_model': 'cashbook.book',
-            }):
+                'company': company.id,
+                'active_model': 'cashbook.book'}):
             types = self.prep_type()
             books = Book.create([{
                 'name': 'From Book',
@@ -231,7 +239,6 @@ Mreturn of bottles
                 'currency': company.currency.id,
                 'number_sequ': self.prep_sequence().id,
                 'start_date': date(2010, 1, 1),
-                'start_balance': Decimal('0.0'),
                 }, {
                 'name': 'To Book',
                 'btype': types.id,
@@ -239,12 +246,11 @@ Mreturn of bottles
                 'currency': company.currency.id,
                 'number_sequ': self.prep_sequence().id,
                 'start_date': date(2010, 1, 1),
-                'start_balance': Decimal('0.0'),
                 }])
 
             Party.create([{
                 'name': 'Foodshop Zehlendorf',
-                'addresses':[('create', [{}])],
+                'addresses': [('create', [{}])],
                 }])
 
             Category.create([{
@@ -290,8 +296,9 @@ L[To Book]
 
             self.assertEqual(list(result.keys()), ['view'])
             self.assertEqual(result['view']['defaults']['company'], company.id)
-            self.assertEqual(result['view']['defaults']['info'],
-"""The following transactionen are now imported:
+            self.assertEqual(
+                result['view']['defaults']['info'],
+                """The following transactionen are now imported:
 Credit: usd0.00
 Debit: usd57.55
 Balance: -usd57.55
@@ -309,11 +316,19 @@ Number of transactions: 2""")
             self.assertEqual(len(books[0].lines), 2)
             self.assertEqual(len(books[1].lines), 1)
 
-            self.assertEqual(books[0].lines[0].rec_name, '12/04/2013|to|-7.30 usd|Transfer to book [To Book | 7.30 usd | Open]')
+            self.assertEqual(
+                books[0].lines[0].rec_name,
+                '12/04/2013|to|-7.30 usd|Transfer to book ' +
+                '[To Book | 7.30 usd | Open]')
             self.assertEqual(books[0].lines[0].state, 'check')
-            self.assertEqual(books[0].lines[1].rec_name, '12/05/2013|Exp|-50.25 usd|some food [Lebensmittel]')
+            self.assertEqual(
+                books[0].lines[1].rec_name,
+                '12/05/2013|Exp|-50.25 usd|some food [Lebensmittel]')
             self.assertEqual(books[0].lines[1].state, 'check')
-            self.assertEqual(books[1].lines[0].rec_name, '12/04/2013|from|7.30 usd|Transfer to book [From Book | -57.55 usd | Open]')
+            self.assertEqual(
+                books[1].lines[0].rec_name,
+                '12/04/2013|from|7.30 usd|Transfer to book ' +
+                '[From Book | -57.55 usd | Open]')
             self.assertEqual(books[1].lines[0].state, 'check')
 
             # run wizard again - import to 'To Book'
@@ -366,8 +381,9 @@ $-7,00
 
             self.assertEqual(list(result.keys()), ['view'])
             self.assertEqual(result['view']['defaults']['company'], company.id)
-            self.assertEqual(result['view']['defaults']['info'],
-"""The following transactionen are now imported:
+            self.assertEqual(
+                result['view']['defaults']['info'],
+                """The following transactionen are now imported:
 Credit: usd0.00
 Debit: usd20.00
 Balance: -usd20.00
@@ -385,18 +401,37 @@ Number of transactions: 2""")
             self.assertEqual(len(books[0].lines), 3)
             self.assertEqual(len(books[1].lines), 3)
 
-            self.assertEqual(books[0].lines[0].rec_name, '12/04/2013|to|-7.30 usd|Transfer to book [To Book | -12.70 usd | Open]')
-            self.assertEqual(books[0].lines[0].state, 'check')
-            self.assertEqual(books[0].lines[1].rec_name, '12/05/2013|Exp|-50.25 usd|some food [Lebensmittel]')
-            self.assertEqual(books[0].lines[1].state, 'check')
-            self.assertEqual(books[0].lines[2].rec_name, '12/06/2013|from|7.00 usd|Transfer to From-Book [To Book | -12.70 usd | Open]')
-            self.assertEqual(books[0].lines[2].state, 'check')
+            self.assertEqual(
+                books[0].lines[0].rec_name,
+                '12/04/2013|to|-7.30 usd|Transfer to book ' +
+                '[To Book | -12.70 usd | Open]')
+            self.assertEqual(
+                books[0].lines[0].state, 'check')
+            self.assertEqual(
+                books[0].lines[1].rec_name,
+                '12/05/2013|Exp|-50.25 usd|some food [Lebensmittel]')
+            self.assertEqual(
+                books[0].lines[1].state, 'check')
+            self.assertEqual(
+                books[0].lines[2].rec_name,
+                '12/06/2013|from|7.00 usd|Transfer to From-Book ' +
+                '[To Book | -12.70 usd | Open]')
+            self.assertEqual(
+                books[0].lines[2].state, 'check')
 
-            self.assertEqual(books[1].lines[0].rec_name, '12/04/2013|from|7.30 usd|Transfer to book [From Book | -50.55 usd | Open]')
+            self.assertEqual(
+                books[1].lines[0].rec_name,
+                '12/04/2013|from|7.30 usd|Transfer to book [From Book ' +
+                '| -50.55 usd | Open]')
             self.assertEqual(books[1].lines[0].state, 'check')
-            self.assertEqual(books[1].lines[1].rec_name, '12/06/2013|Exp/Sp|-10.00 usd|Splitbooking with category and account [-]')
+            self.assertEqual(
+                books[1].lines[1].rec_name,
+                '12/06/2013|Exp/Sp|-10.00 usd|Splitbooking with category' +
+                ' and account [-]')
             self.assertEqual(books[1].lines[1].state, 'check')
-            self.assertEqual(books[1].lines[2].rec_name, '12/10/2013|Exp|-10.00 usd|some food [Lebensmittel]')
+            self.assertEqual(
+                books[1].lines[2].rec_name,
+                '12/10/2013|Exp|-10.00 usd|some food [Lebensmittel]')
             self.assertEqual(books[1].lines[2].state, 'check')
 
 # end PartyTestCase
diff --git a/tryton.cfg b/tryton.cfg
index 780e658..c0d91af 100644
--- a/tryton.cfg
+++ b/tryton.cfg
@@ -1,5 +1,5 @@
 [tryton]
-version=6.0.3
+version=7.0.0
 depends:
     cashbook
 xml:
diff --git a/versiondep.txt b/versiondep.txt
index f35d598..bae9199 100644
--- a/versiondep.txt
+++ b/versiondep.txt
@@ -1 +1 @@
-cashbook;6.0.10;6.0.999;mds
+cashbook;7.0.31;7.0.999;mds