diff --git a/tests/test_load.py b/tests/test_load.py
index 848c8f8..da8bc92 100644
--- a/tests/test_load.py
+++ b/tests/test_load.py
@@ -22,6 +22,9 @@ dico_dirs = Path('../rougail/tests/dictionaries')
 #envtest = _here / 'tests' / 'envvars'
 #test_ok = [dico_dirs / env_test_folder]
 
+#let's save the original environment
+save = environ.copy()
+
 test_ok = set()
 excludes = set()
 test_ok -= excludes
@@ -34,6 +37,7 @@ test_ok = list(test_ok)
 test_ok.sort()
 
 
+
 @fixture(scope="module", params=test_ok)
 def test_dir(request):
     return request.param
@@ -77,6 +81,8 @@ def test_dictionaries_warning(test_dir):
         expected = load(json_file)
     # here is the effective test
     assert  expected == config_dict
+    #teardown: set the original environement again
+    environ = save
 
 
 def populate(dest_dir, rougailconfig):