diff --git a/irrd/scripts/irr_rpsl_submit.py b/irrd/scripts/irr_rpsl_submit.py
index 9ddbeeb..2983264 100755
--- a/irrd/scripts/irr_rpsl_submit.py
+++ b/irrd/scripts/irr_rpsl_submit.py
@@ -221,21 +221,6 @@ def prefix(self):
         return "Connection refused"  # pragma: no cover
 
 
-class XHTTPNotFound(XNetwork):
-    """
-    Raised when the response returns 404.
-
-    This is a refinement of HTTPError, which is not granular enough
-    to provide useful information to consumers.
-    """
-
-    def prefix(self):
-        """
-        Returns the prefix to attach to the start of each logged message.
-        """
-        return "Not found"
-
-
 class XNameResolutionFailed(XNetwork):
     """
     Raised when urllib cannot resolve the URL host.
@@ -763,8 +748,6 @@ def send_request(requests_text, args):
             raise XNameResolutionFailed(args.url, reason) from error
         if isinstance(reason, (socket.timeout, ConnectionRefusedError)):
             raise XHTTPConnectionFailed(args.url, http_request) from error  # pragma: no cover
-        if reason == "Not Found":
-            raise XHTTPNotFound(args.url, http_request) from error
         raise error  # pragma: no cover: CI glitch workaround
     except Exception as error:
         raise error
diff --git a/irrd/scripts/tests/test_irr_rpsl_submit.py b/irrd/scripts/tests/test_irr_rpsl_submit.py
index 20bd2f2..dce1d91 100755
--- a/irrd/scripts/tests/test_irr_rpsl_submit.py
+++ b/irrd/scripts/tests/test_irr_rpsl_submit.py
@@ -37,7 +37,7 @@
 REGEX_UNRESOLVABLE = re.compile("Could not resolve")
 REGEX_UNREACHABLE = re.compile("Connection refused|Cannot assign requested address")
 REGEX_BAD_RESPONSE = re.compile("decoding JSON")
-REGEX_NOT_FOUND = re.compile("Not found")
+REGEX_NOT_ALLOWED = re.compile("Method Not Allowed")
 
 EXIT_SUCCESS = 0
 EXIT_CHANGE_FAILED = 1
@@ -767,7 +767,7 @@ def test_020_dash_o_noop(self):
             EXIT_NETWORK_ERROR,
             "using both -h and -O exits with value appropriate to -h value",
         )
-        self.assertRegex(result.stderr, REGEX_NOT_FOUND)
+        self.assertRegex(result.stderr, REGEX_NOT_ALLOWED)
 
     def test_030_empty_input_option(self):
         result = Runner.run(["-u", IRRD_URL], ENV_EMPTY, RPSL_EMPTY)
@@ -841,7 +841,7 @@ def test_050_non_json_response(self):
             result = Runner.run(row, ENV_EMPTY, RPSL_MINIMAL)
             self.assertEqual(
                 result.returncode,
-                EXIT_RESPONSE_ERROR,
+                EXIT_NETWORK_ERROR,
                 f"Bad response URL {row[1]} exits with {EXIT_NETWORK_ERROR}",
             )
-            self.assertRegex(result.stderr, REGEX_BAD_RESPONSE)
+            self.assertRegex(result.stderr, REGEX_NOT_ALLOWED)