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diff --git a/src/mailman/database/postgresql.py b/src/mailman/database/postgresql.py
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+++ b/src/mailman/database/postgresql.py
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+# Copyright (C) 2011 by the Free Software Foundation, Inc.
+#
+# This file is part of GNU Mailman.
+#
+# GNU Mailman is free software: you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option)
+# any later version.
+#
+# GNU Mailman is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# GNU Mailman.  If not, see <http://www.gnu.org/licenses/>.
+
+"""PostgreSQL database support."""
+
+from __future__ import absolute_import, unicode_literals
+
+__metaclass__ = type
+__all__ = [
+    'PostgreSQLDatabase',
+    ]
+
+
+from operator import attrgetter
+from pkg_resources import resource_string
+
+from mailman.database.base import StormBaseDatabase
+
+
+
+class PostgreSQLDatabase(StormBaseDatabase):
+    """Database class for PostgreSQL."""
+
+    def _database_exists(self, store):
+        """See `BaseDatabase`."""
+        table_query = ('SELECT table_name FROM information_schema.tables '
+                       "WHERE table_schema = 'public'")
+        table_names = set(item[0] for item in
+                          store.execute(table_query))
+        return 'version' in table_names
+
+    def _get_schema(self):
+        """See `BaseDatabase`."""
+        return resource_string('mailman.database.sql', 'postgres.sql')
+
+    def _post_reset(self, store):
+        """PostgreSQL-specific test suite cleanup.
+
+        Reset the <tablename>_id_seq.last_value so that primary key ids
+        restart from zero for new tests.
+        """
+        from mailman.database.model import ModelMeta
+        classes = sorted(ModelMeta._class_registry,
+                         key=attrgetter('__storm_table__'))
+        # Recipe adapted from
+        # http://stackoverflow.com/questions/544791/
+        # django-postgresql-how-to-reset-primary-key
+        for model_class in classes:
+            store.execute("""\
+                SELECT setval('"{0}_id_seq"', coalesce(max("id"), 1),
+                              max("id") IS NOT null)
+                       FROM "{0}";
+                """.format(model_class.__storm_table__))