diff --git a/test/devices/fixtures/invalid_get_ntp_response.xml b/test/devices/fixtures/invalid_get_ntp_response.xml
new file mode 100644
index 0000000..bba79e7
--- /dev/null
+++ b/test/devices/fixtures/invalid_get_ntp_response.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8" standalone="yes" ?>
+<s:Envelope
+  xmlns:s="http://www.w3.org/2003/05/soap-envelope"
+  xmlns:sc="http://www.w3.org/2003/05/soap-encoding"
+  xmlns:ter="http://www.onvif.org/ver10/error"
+  xmlns:wsnt="http://docs.oasis-open.org/wsn/b-2"
+  xmlns:wsrf-bf="http://docs.oasis-open.org/wsrf/bf-2"
+  xmlns:d="http://schemas.xmlsoap.org/ws/2005/04/discovery">
+  <s:Body>
+    <s:Fault>
+      <s:Code>
+        <s:Value>s:Sender</s:Value>
+        <s:Subcode>
+          <s:Value>ter:ActionNotSupported</s:Value>
+          <s:Subcode>
+            <s:Value>ter:NotImplemented</s:Value>
+          </s:Subcode>
+        </s:Subcode>
+      </s:Code>
+      <s:Reason>
+        <s:Text xml:lang="en">This optional method is not implemented</s:Text>
+      </s:Reason>
+    </s:Fault>
+  </s:Body>
+</s:Envelope>
\ No newline at end of file
diff --git a/test/devices/get_ntp.exs b/test/devices/get_ntp.exs
index ceba8a9..5283676 100644
--- a/test/devices/get_ntp.exs
+++ b/test/devices/get_ntp.exs
@@ -26,5 +26,17 @@ defmodule Onvif.Devices.GetNTPTest do
                }
              }
     end
+
+    test "check a non-implemented GetNTP (dahua)" do
+      xml_response = File.read!("test/devices/fixtures/invalid_get_ntp_response.xml")
+      device = Onvif.Factory.device()
+
+      Mimic.expect(Tesla, :request, fn _client, _opts ->
+        {:ok, %{status: 200, body: xml_response}}
+      end)
+
+      {:ok, service_capabilities} = Onvif.Devices.GetNTP.request(device)
+      assert service_capabilities == nil
+    end
   end
 end