diff -r 1d8fd5a53ced -r 9479901b53a5 src/pyams_content/shared/site/zmi/container.py
--- a/src/pyams_content/shared/site/zmi/container.py	Mon Jun 29 22:50:00 2020 +0200
+++ b/src/pyams_content/shared/site/zmi/container.py	Wed Jul 01 14:10:50 2020 +0200
@@ -454,7 +454,8 @@
                 title=name or super(SiteContainerTreeNameColumn, self).renderCell(item))
 
 
-@adapter_config(name='content-type', context=(IBaseSiteItem, IPyAMSLayer, ISiteTreeTable), provides=IColumn)
+@adapter_config(name='content-type', context=(IBaseSiteItem, IPyAMSLayer, ISiteTreeTable),
+                provides=IColumn)
 class SiteContainerContentTypeColumn(I18nColumn, GetAttrColumn):
     """Site container content type column"""
 
@@ -466,7 +467,8 @@
         return self.request.localizer.translate(obj.content_name)
 
 
-@adapter_config(name='sequence', context=(IBaseSiteItem, IPyAMSLayer, ISiteTreeTable), provides=IColumn)
+@adapter_config(name='sequence', context=(IBaseSiteItem, IPyAMSLayer, ISiteTreeTable),
+                provides=IColumn)
 class SiteContainerTreeSequenceColumn(SharedToolDashboardSequenceColumn):
     """Site container tree OID column"""