diff --git a/tests/packagedbtests.py b/tests/packagedbtests.py
index fca24392..4dc5f95a 100644
--- a/tests/packagedbtests.py
+++ b/tests/packagedbtests.py
@@ -9,16 +9,20 @@ from pisi import context
 class PackageDBTestCase(unittest.TestCase):
 
     def setUp(self):
+        # setUp will be called for each test individually
         self.ctx = context.BuildContext('tests/popt/pspec.xml')
         self.pdb = PackageDB('testdb')
         
     def testAdd(self):
         self.pdb.add_package(self.ctx.spec.packages[0])
         self.assert_(self.pdb.has_package('popt-libs'))
+        # close the database and remove lock
+        del self.pdb
     
     def testRemove(self):
         self.pdb.remove_package('popt-libs')
         self.assert_(not self.pdb.has_package('popt-libs'))
+        del self.pdb
 
 suite = unittest.makeSuite(PackageDBTestCase)