diff --git a/dist/pythonlibs/riotctrl_shell/tests/test_congure_test.py b/dist/pythonlibs/riotctrl_shell/tests/test_congure_test.py
new file mode 100644
index 0000000000..a1b630bd5f
--- /dev/null
+++ b/dist/pythonlibs/riotctrl_shell/tests/test_congure_test.py
@@ -0,0 +1,130 @@
+# Copyright (C) 2021 Freie Universität Berlin
+#
+# This file is subject to the terms and conditions of the GNU Lesser
+# General Public License v2.1. See the file LICENSE in the top level
+# directory for more details.
+
+import pytest
+import riotctrl_shell.congure_test
+
+from .common import init_ctrl
+
+
+@pytest.fixture
+def shell():
+    rc = init_ctrl()
+    yield riotctrl_shell.congure_test.CongureTest(rc)
+
+
+@pytest.fixture
+def success_shell():
+    rc = init_ctrl()
+    rc.output = '{"success":null}'
+    yield riotctrl_shell.congure_test.CongureTest(rc)
+
+
+def test_congure_setup(shell):
+    res = shell.setup(0)
+    assert res == 'cong_setup 0'
+
+
+def test_congure_clear(shell):
+    res = shell.clear()
+    assert res == 'cong_clear'
+
+
+def test_congure_init(shell):
+    res = shell.init(0xabcdef)
+    assert res == 'cong_init 0xabcdef'
+
+
+def test_congure_inter_msg_interval(shell):
+    res = shell.inter_msg_interval(12345)
+    assert res == 'cong_imi 12345'
+
+
+def test_congure_add_msg(shell):
+    res = shell.add_msg(send_time=543234, size=664343, resends=43)
+    assert res == 'cong_add_msg 543234 664343 43'
+
+
+def test_congure_msgs_reset(shell):
+    res = shell.msgs_reset()
+    assert res == 'cong_msgs_reset'
+
+
+def test_congure_report(shell):
+    res = shell.report('foobar', 'a', 'b', 'c')
+    assert res == 'cong_report foobar a b c'
+
+
+def test_congure_report_msg_sent(shell):
+    res = shell.report_msg_sent(12364)
+    assert res == 'cong_report msg_sent 12364'
+
+
+def test_congure_report_msg_discarded(shell):
+    res = shell.report_msg_discarded(12364)
+    assert res == 'cong_report msg_discarded 12364'
+
+
+def test_congure_report_msgs_lost_base(shell):
+    res = shell.report_msgs_lost_base()
+    assert res == 'cong_report msgs_lost '
+
+
+def test_congure_report_msgs_lost(success_shell):
+    res = success_shell.report_msgs_lost([
+        {'send_time': 1545245236, 'size': 12434, 'resends': 32},
+        {'send_time': 175344346, 'size': 34323, 'resends': 42},
+    ])
+    assert res == '{"success":null}'
+    assert success_shell.riotctrl.term.commands == [
+        'cong_add_msg 1545245236 12434 32',
+        'cong_add_msg 175344346 34323 42',
+        'cong_report msgs_lost ',
+    ]
+
+
+def test_congure_report_msgs_timeout_base(shell):
+    res = shell.report_msgs_timeout_base()
+    assert res == 'cong_report msgs_timeout '
+
+
+def test_congure_report_msgs_timeout(success_shell):
+    res = success_shell.report_msgs_timeout([
+        {'send_time': 1545245236, 'size': 12434, 'resends': 32},
+        {'send_time': 175344346, 'size': 34323, 'resends': 42},
+    ])
+    assert res == '{"success":null}'
+    assert success_shell.riotctrl.term.commands == [
+        'cong_add_msg 1545245236 12434 32',
+        'cong_add_msg 175344346 34323 42',
+        'cong_report msgs_timeout ',
+    ]
+
+
+def test_congure_report_msg_acked_base(shell):
+    res = shell.report_msg_acked_base(
+        ack_recv_time=12354356, ack_id=4314, ack_size=5632, ack_clean=True,
+        ack_wnd=45645, ack_delay=12345
+    )
+    assert res == 'cong_report msg_acked 12354356 4314 5632 1 45645 12345'
+
+
+def test_congure_report_msg_acked(success_shell):
+    res = success_shell.report_msg_acked(
+        msg={'send_time': 325242435, 'size': 34321, 'resends': 4},
+        ack={'recv_time': 325243543, 'id': 455763452, 'size': 4242,
+             'clean': 0, 'wnd': 45645, 'delay': 12345},
+    )
+    assert res == '{"success":null}'
+    assert success_shell.riotctrl.term.commands == [
+        'cong_add_msg 325242435 34321 4',
+        'cong_report msg_acked 325243543 455763452 4242 0 45645 12345',
+    ]
+
+
+def test_congure_report_ecn_ce(shell):
+    res = shell.report_ecn_ce(583424522)
+    assert res == 'cong_report ecn_ce 583424522'