diff --git a/_unittest/test_44_TouchstoneParser.py b/_unittest/test_44_TouchstoneParser.py
index 5852b3fb7dc..726a4a74c99 100644
--- a/_unittest/test_44_TouchstoneParser.py
+++ b/_unittest/test_44_TouchstoneParser.py
@@ -38,7 +38,7 @@ def test_02_read_ts_file(self):
         ts1 = TouchstoneData(touchstone_file=os.path.join(test_T44_dir, "port_order_1234.s8p"))
         assert ts1.get_mixed_mode_touchstone_data()
         ts2 = TouchstoneData(touchstone_file=os.path.join(test_T44_dir, "port_order_1324.s8p"))
-        assert ts1.get_mixed_mode_touchstone_data(port_ordering="1324")
+        assert ts2.get_mixed_mode_touchstone_data(port_ordering="1324")
 
         assert ts1.plot_insertion_losses(plot=False)
         assert ts1.get_worst_curve(curve_list=ts1.get_return_loss_index(), plot=False)
diff --git a/pyaedt/generic/touchstone_parser.py b/pyaedt/generic/touchstone_parser.py
index 75a506b89fc..b373f6997e1 100644
--- a/pyaedt/generic/touchstone_parser.py
+++ b/pyaedt/generic/touchstone_parser.py
@@ -1,4 +1,4 @@
-from copy import deepcopy as copy
+from copy import copy
 import itertools
 import os
 import re