diff --git a/tests/net/lib/lwm2m/interop/README.md b/tests/net/lib/lwm2m/interop/README.md
index 28d8e12ccca..7df931203aa 100644
--- a/tests/net/lib/lwm2m/interop/README.md
+++ b/tests/net/lib/lwm2m/interop/README.md
@@ -135,7 +135,7 @@ Tests are written from test spec;
 |LightweightM2M-1.1-int-9 - Bootstrap and Configuration Consistency     | |testcase not implemented |
 |LightweightM2M-1.1-int-101 - Initial Registration                      |:white_check_mark:| |
 |LightweightM2M-1.1-int-102 - Registration Update                       |:white_check_mark:| |
-|LightweightM2M-1.1-int-103 - Deregistration                            |:large_orange_diamond:|We don't have "disabled" functionality in server object|
+|LightweightM2M-1.1-int-103 - Deregistration                            |:white_check_mark:| |
 |LightweightM2M-1.1-int-104 - Registration Update Trigge                |:white_check_mark:| |
 |LightweightM2M-1.1-int-105 - Discarded Register Update                 |:white_check_mark:| |
 |LightweightM2M-1.1-int-107 - Extending the lifetime of a registration  |:white_check_mark:| |
diff --git a/tests/net/lib/lwm2m/interop/pytest/test_lwm2m.py b/tests/net/lib/lwm2m/interop/pytest/test_lwm2m.py
index ed7aaceac20..4e0ae207e8d 100644
--- a/tests/net/lib/lwm2m/interop/pytest/test_lwm2m.py
+++ b/tests/net/lib/lwm2m/interop/pytest/test_lwm2m.py
@@ -44,6 +44,17 @@ def test_LightweightM2M_1_1_int_102(shell: Shell, dut: DeviceAdapter, leshan: Le
     assert latest["lifetime"] == lifetime
     shell.exec_command('lwm2m write 1/0/1 -u32 86400')
 
+def test_LightweightM2M_1_1_int_103(shell: Shell, dut: DeviceAdapter, leshan: Leshan, endpoint: str):
+    """LightweightM2M-1.1-int-103 - Deregistration"""
+    leshan.execute(endpoint, '1/0/4')
+    dut.readlines_until(regex='LwM2M server disabled', timeout=5.0)
+    dut.readlines_until(regex='Deregistration success', timeout=5.0)
+    # Reset timers by restarting the client
+    shell.exec_command('lwm2m stop')
+    time.sleep(1)
+    shell.exec_command(f'lwm2m start {endpoint}')
+    dut.readlines_until(regex='.*Registration Done', timeout=5.0)
+
 def test_LightweightM2M_1_1_int_104(shell: Shell, dut: DeviceAdapter, leshan: Leshan, endpoint: str):
     """LightweightM2M-1.1-int-104 - Registration Update Trigger"""
     shell.exec_command('lwm2m update')