diff -r 058bb3dc685f -r 0b59724cb3f2 server/test/data-migractions/cubes/fakecustomtype/site_cubicweb.py
--- a/server/test/data-migractions/cubes/fakecustomtype/site_cubicweb.py	Mon Jan 04 18:40:30 2016 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,17 +0,0 @@
-from yams import register_base_type
-from logilab.database import get_db_helper
-from logilab.database.sqlgen import SQLExpression
-
-_NUMERIC_PARAMETERS = {'scale': 0, 'precision': None}
-register_base_type('Numeric', _NUMERIC_PARAMETERS)
-
-# Add the datatype to the helper mapping
-pghelper = get_db_helper('postgres')
-
-
-def pg_numeric_sqltype(rdef):
-    """Return a PostgreSQL column type corresponding to rdef
-    """
-    return 'numeric(%s, %s)' % (rdef.precision, rdef.scale)
-
-pghelper.TYPE_MAPPING['Numeric'] = pg_numeric_sqltype