diff --git a/examples/test/test_scratchnet.py b/examples/test/test_scratchnet.py
index 3d44955..7facc0f 100755
--- a/examples/test/test_scratchnet.py
+++ b/examples/test/test_scratchnet.py
@@ -16,6 +16,7 @@ class testScratchNet( unittest.TestCase ):
         p = pexpect.spawn( 'python -m %s' % name )
         index = p.expect( self.opts, timeout=120 )
         self.assertEqual( index, 0 )
+        p.wait()
 
     def testPingKernel( self ):
         self.pingTest( 'mininet.examples.scratchnet' )