diff --git a/unit-tests/func/dfu/test-device-fw-compatibility.py b/unit-tests/func/dfu/test-device-fw-compatibility.py
new file mode 100644
index 00000000000..6e02e976be2
--- /dev/null
+++ b/unit-tests/func/dfu/test-device-fw-compatibility.py
@@ -0,0 +1,51 @@
+# License: Apache 2.0. See LICENSE file in root directory.
+# Copyright(c) 2021 Intel Corporation. All Rights Reserved.
+
+# test:device L500*
+# test:device D400*
+
+import pyrealsense2 as rs
+from rspy import test
+
+
+def check_firmware_not_compatible(updatable_device, old_fw_image):
+    test.check(not updatable_device.check_firmware_compatibility(old_fw_image))
+
+def check_firmware_compatible(updatable_device, old_fw_image):
+    test.check(updatable_device.check_firmware_compatibility(old_fw_image))
+
+
+ctx = rs.context()
+dev = ctx.query_devices()[0]
+updatable_device = dev.as_updatable()
+
+#############################################################################################
+test.start("checking firmware compatibility with device")
+pid = dev.get_info(rs.camera_info.product_id)
+if pid == '0B3A':  # D435I
+    print("device D435i found")
+    with open("Signed_Image_UVC_5_12_6_0.bin", 'rb') as binary_file:
+        old_fw_image = bytearray(binary_file.read())
+        check_firmware_not_compatible(updatable_device, old_fw_image)
+    with open("Signed_Image_UVC_5_12_7_100.bin", 'rb') as binary_file:
+        old_fw_image = bytearray(binary_file.read())
+        check_firmware_compatible(updatable_device, old_fw_image)
+elif pid == '0B07':  # D435
+    print("device D435 found")
+    with open("Signed_Image_UVC_5_8_14_0.bin", 'rb') as binary_file:
+        old_fw_image = bytearray(binary_file.read())
+        check_firmware_not_compatible(updatable_device, old_fw_image)
+    with open("Signed_Image_UVC_5_8_15_0.bin", 'rb') as binary_file:
+        old_fw_image = bytearray(binary_file.read())
+        check_firmware_compatible(updatable_device, old_fw_image)
+elif pid == '0B64':  # L515
+    print("device L515 found")
+    with open("Signed_Image_UVC_1_4_0_10.bin", 'rb') as binary_file:
+        old_fw_image = bytearray(binary_file.read())
+        check_firmware_not_compatible(updatable_device, old_fw_image)
+    with open("Signed_Image_UVC_1_4_1_0.bin", 'rb') as binary_file:
+        old_fw_image = bytearray(binary_file.read())
+        check_firmware_compatible(updatable_device, old_fw_image)
+
+test.finish()
+test.print_results_and_exit()
diff --git a/wrappers/python/pyrs_device.cpp b/wrappers/python/pyrs_device.cpp
index 60b9c587a23..818cb7ce89f 100644
--- a/wrappers/python/pyrs_device.cpp
+++ b/wrappers/python/pyrs_device.cpp
@@ -69,9 +69,8 @@ void init_device(py::module &m) {
         .def("update_unsigned", [](rs2::updatable& self, const std::vector<uint8_t>& fw_image, std::function<void(float)> f, int update_mode) { return self.update_unsigned(fw_image, f, update_mode); },
              "Update an updatable device to the provided unsigned firmware. This call is executed on the caller's thread and it supports progress notifications via the callback.",
              "fw_image"_a, "callback"_a, "update_mode"_a = RS2_UNSIGNED_UPDATE_MODE_UPDATE, py::call_guard<py::gil_scoped_release>())
-        .def("check_firmware_compatibility", [](rs2::updatable& self, const std::vector<uint8_t>& fw_image) { return self.check_firmware_compatibility(fw_image); },
-            "Check firmware compatibility with device. This method should be called before burning a signed firmware.",
-            "fw_image"_a);
+        .def("check_firmware_compatibility", &rs2::updatable::check_firmware_compatibility, "Check firmware compatibility with device. "
+            "This method should be called before burning a signed firmware.", "image"_a);
 
     py::class_<rs2::update_device, rs2::device> update_device(m, "update_device");
     update_device.def(py::init<rs2::device>())