From 684d561fcb2bd5e5f7db77760a9f7ee093f9983b Mon Sep 17 00:00:00 2001
From: Sawyer Fuller <minster@uw.edu>
Date: Thu, 11 Feb 2021 15:36:51 -0800
Subject: [PATCH] changed discrete-time transfer function in freqresp_test.py
 to be a better-behaved stable transfer function that does not have poles and
 zeros on the unit circle

---
 control/tests/freqresp_test.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/control/tests/freqresp_test.py b/control/tests/freqresp_test.py
index 86de0e77a..c73f5343e 100644
--- a/control/tests/freqresp_test.py
+++ b/control/tests/freqresp_test.py
@@ -220,7 +220,7 @@ def dsystem_dt(request):
     dt = request.param
     systems = {'sssiso': StateSpace(sys.A, sys.B, sys.C, sys.D, dt),
                'ssmimo': StateSpace(A, B, C, D, dt),
-               'tf': TransferFunction([1, 1], [1, 2, 1], dt)}
+               'tf': TransferFunction([2, 1], [2, 1, 1], dt)}
     return systems