diff --git a/product/ERP5/tests/testBase.py b/product/ERP5/tests/testBase.py
index 9e36d79e27cc7fb4bcfcba25aa67e7af31aa00bc..68818690587a56c2a83eb638c8d40cf2195128cc 100755
--- a/product/ERP5/tests/testBase.py
+++ b/product/ERP5/tests/testBase.py
@@ -68,7 +68,7 @@ class TestBase(ERP5TypeTestCase):
   def getBusinessTemplateList(self):
     """
     """
-    return ('erp5_base')
+    return ('erp5_base',)
 
   def login(self, quiet=0, run=run_all_test):
     uf = self.getPortal().acl_users
diff --git a/product/ERP5/tests/testERP5Category.py b/product/ERP5/tests/testERP5Category.py
index 0bafa7369d8b84dadf2f8bdf0c00f9e7eb0dc34f..1903de9b7cb2a8223e587407eb6d7cc30bc6bbd9 100755
--- a/product/ERP5/tests/testERP5Category.py
+++ b/product/ERP5/tests/testERP5Category.py
@@ -76,7 +76,7 @@ class TestERP5Category(ERP5TypeTestCase):
       Return the list of business templates.
 
     """
-    return ('erp5_base')
+    return ('erp5_base',)
 
   def enableActivityTool(self):
     """
diff --git a/product/ERP5/tests/testERP5HR.py b/product/ERP5/tests/testERP5HR.py
index 0ecc945c8c05732638154b797a45ae5e846516dd..03e419b51c5e974d9156fef0006387bc0d3073fa 100755
--- a/product/ERP5/tests/testERP5HR.py
+++ b/product/ERP5/tests/testERP5HR.py
@@ -74,7 +74,7 @@ class TestHR(ERP5TypeTestCase):
     """
       Return the list of required business templates.
     """
-    return ('erp5_base')
+    return ('erp5_base',)
 
 
   def afterSetUp(self, quiet=QUIET, run=RUN_ALL_TEST):