diff --git a/epyt/tests/test_unit_MSX.py b/epyt/tests/test_unit_MSX.py
index fb04820..3617593 100644
--- a/epyt/tests/test_unit_MSX.py
+++ b/epyt/tests/test_unit_MSX.py
@@ -17,7 +17,7 @@ def setUp(self):
 
     def tearDown(self):
         """Call after every test case."""
-        self.msxClass.MSXclose()
+        self.epanetClass.unloadMSX()
         self.epanetClass.unload()
 
     """ ------------------------------------------------------------------------- """