diff --git a/weboob/tools/capabilities/bank/test.py b/weboob/tools/capabilities/bank/test.py
index ac7b41df45036b34a53c1c1778c44bb7036acdee..75677669253c7a3a9ad75dcf9c4fe30c0f55693c 100644
--- a/weboob/tools/capabilities/bank/test.py
+++ b/weboob/tools/capabilities/bank/test.py
@@ -153,7 +153,7 @@ def check_investments(self, account):
 
     def check_investment(self, account, inv):
         self.assertTrue(inv.label, 'investment %r has no label' % inv)
-        self.assertTrue(inv.valuation, 'investment %r has no valuation' % inv)
+        self.assertFalse(empty(inv.valuation), 'investment %r has no valuation' % inv)
         if inv.code and inv.code != 'XX-liquidity':
             self.assertTrue(inv.code_type, 'investment %r has code but no code type' % inv)
         if inv.code_type == inv.CODE_TYPE_ISIN and inv.code and not inv.code.startswith('XX'):