diff --git a/colorama/tests/initialise_test.py b/colorama/tests/initialise_test.py
index 2f7384d..1498bfe 100644
--- a/colorama/tests/initialise_test.py
+++ b/colorama/tests/initialise_test.py
@@ -6,7 +6,7 @@
 from mock import patch
 
 from ..ansitowin32 import StreamWrapper
-from ..initialise import init
+from ..initialise import init, deinit
 from .utils import osname, redirected_output, replace_by
 
 orig_stdout = sys.stdout
@@ -22,6 +22,7 @@ def setUp(self):
     def tearDown(self):
         sys.stdout = orig_stdout
         sys.stderr = orig_stderr
+        deinit()
 
     def assertWrapped(self):
         self.assertIsNot(sys.stdout, orig_stdout, 'stdout should be wrapped')
@@ -96,11 +97,13 @@ def testAutoResetPassedOn(self, mockATW32, _):
     def testAutoResetChangeable(self, mockATW32):
         with osname("nt"):
             init()
+            deinit()
 
             init(autoreset=True)
             self.assertEqual(len(mockATW32.call_args_list), 4)
             self.assertEqual(mockATW32.call_args_list[2][1]['autoreset'], True)
             self.assertEqual(mockATW32.call_args_list[3][1]['autoreset'], True)
+            deinit()
 
             init()
             self.assertEqual(len(mockATW32.call_args_list), 6)