diff --git a/erp5/util/testnode/ScalabilityTestRunner.py b/erp5/util/testnode/ScalabilityTestRunner.py
index e1fc4bf6478e6d91b136822998a1d28628d3ed0c..50776c1c44d3aac266836af5511aae596cf5633b 100644
--- a/erp5/util/testnode/ScalabilityTestRunner.py
+++ b/erp5/util/testnode/ScalabilityTestRunner.py
@@ -142,7 +142,7 @@ the current cluster configuration." %(node_test_suite.test_suite_title,))
     # From the line below we would not supply any more softwares
     self.authorize_supply = False
     # Here a loop while softwares are not all installed
-    while isRemainingSoftwareToInstall() == False:
+    while self.isRemainingSoftwareToInstall() == False:
         self.testnode.log("Master testnode is waiting\
  for the end of all software installation.")
         time.sleep(4)