diff --git a/t/db_dependent/Members.t b/t/db_dependent/Members.t
index acfb2eee41..8bc9ed260d 100755
--- a/t/db_dependent/Members.t
+++ b/t/db_dependent/Members.t
@@ -323,6 +323,10 @@ $builder->build({
         },
 });
 
+# The following calls to GetBorrowersToExpunge are assuming that the pref
+# IndependentBranches is off.
+t::lib::Mocks::mock_preference('IndependentBranches', 0);
+
 my $owner = AddMember (categorycode => 'STAFFER', branchcode => $library2->{branchcode} );
 my $list1 = AddPatronList( { name => 'Test List 1', owner => $owner } );
 my @listpatrons = ($bor1inlist, $bor2inlist);