diff --git a/py/thread/testing/test_io.py b/py/thread/testing/test_io.py
index 41fdf44b5..dd33bdffb 100644
--- a/py/thread/testing/test_io.py
+++ b/py/thread/testing/test_io.py
@@ -12,55 +12,61 @@ def test_threadout_install_deinstall():
     assert old == sys.stdout
 
 class TestThreadOut:
-    def setup_method(self, method):
-        self.out = ThreadOut(sys, 'stdout')
-    def teardown_method(self, method):
-        self.out.deinstall()
-
     def test_threadout_one(self):
-        l = []
-        self.out.setwritefunc(l.append)
-        print 42,13,
-        x = l.pop(0)
-        assert x == '42'
-        x = l.pop(0)
-        assert x == ' '
-        x = l.pop(0)
-        assert x == '13'
-
+        out = ThreadOut(sys, 'stdout')
+        try:
+            l = []
+            out.setwritefunc(l.append)
+            print 42,13,
+            x = l.pop(0)
+            assert x == '42'
+            x = l.pop(0)
+            assert x == ' '
+            x = l.pop(0)
+            assert x == '13'
+        finally:
+            out.deinstall()
 
     def test_threadout_multi_and_default(self):
-        num = 3
-        defaults = []
-        def f(l):
-            self.out.setwritefunc(l.append)
-            print id(l),
-            self.out.delwritefunc()
-            print 1
-        self.out.setdefaultwriter(defaults.append)
-        pool = WorkerPool()
-        listlist = []
-        for x in range(num):
-            l = []
-            listlist.append(l)
-            pool.dispatch(f, l)
-        pool.shutdown()
-        for name, value in self.out.__dict__.items():
-            print >>sys.stderr, "%s: %s" %(name, value)
-        pool.join(2.0)
-        for i in range(num):
-            item = listlist[i]
-            assert item ==[str(id(item))]
-        assert not self.out._tid2out
-        assert defaults
-        expect = ['1' for x in range(num)]
-        defaults = [x for x in defaults if x.strip()]
-        assert defaults == expect
+        out = ThreadOut(sys, 'stdout')
+        try:
+            num = 3
+            defaults = []
+            def f(l):
+                out.setwritefunc(l.append)
+                print id(l),
+                out.delwritefunc()
+                print 1
+            out.setdefaultwriter(defaults.append)
+            pool = WorkerPool()
+            listlist = []
+            for x in range(num):
+                l = []
+                listlist.append(l)
+                pool.dispatch(f, l)
+            pool.shutdown()
+            for name, value in out.__dict__.items():
+                print >>sys.stderr, "%s: %s" %(name, value)
+            pool.join(2.0)
+            for i in range(num):
+                item = listlist[i]
+                assert item ==[str(id(item))]
+            assert not out._tid2out
+            assert defaults
+            expect = ['1' for x in range(num)]
+            defaults = [x for x in defaults if x.strip()]
+            assert defaults == expect
+        finally:
+            out.deinstall()
 
     def test_threadout_nested(self):
-        # we want ThreadOuts to coexist
-        last = sys.stdout
-        out = ThreadOut(sys, 'stdout')
-        assert last == sys.stdout
-        out.deinstall()
-        assert last == sys.stdout
+        out1 = ThreadOut(sys, 'stdout')
+        try:
+            # we want ThreadOuts to coexist
+            last = sys.stdout
+            out = ThreadOut(sys, 'stdout')
+            assert last == sys.stdout
+            out.deinstall()
+            assert last == sys.stdout
+        finally:
+            out1.deinstall()