diff --git a/amplpy/tests/test_environment.py b/amplpy/tests/test_environment.py
index 52691a1..a7c84a9 100644
--- a/amplpy/tests/test_environment.py
+++ b/amplpy/tests/test_environment.py
@@ -23,7 +23,7 @@ def test_environment_initialization(self):
     def test_environment(self):
         from amplpy import Environment, AMPL
 
-        os.environ["PYTHONIOENCODING"] = "utf-8"
+        #os.environ["PYTHONIOENCODING"] = "utf-8"
         os.environ["USER1"] = "Filipe Brandão"
         
         env1 = Environment()