diff --git a/libmproxy/cmdline.py b/libmproxy/cmdline.py
index b9e62b713..28156a599 100644
--- a/libmproxy/cmdline.py
+++ b/libmproxy/cmdline.py
@@ -421,8 +421,7 @@ def common_options(parser):
         "Proxy Authentication",
         """
             Specify which users are allowed to access the proxy and the method
-            used for authenticating them. These options are ignored if the
-            proxy is in transparent or reverse proxy mode.
+            used for authenticating them.
         """
     )
     user_specification_group = group.add_mutually_exclusive_group()
diff --git a/test/test_proxy.py b/test/test_proxy.py
index 2ff01acc6..614bb8b9f 100644
--- a/test/test_proxy.py
+++ b/test/test_proxy.py
@@ -69,12 +69,24 @@ class TestProcessProxyOptions:
     def test_no_transparent(self):
         self.assert_err("transparent mode not supported", "-T")
 
+
     @mock.patch("libmproxy.platform.resolver")
-    def test_transparent_reverse(self, _):
-        self.assert_err("mutually exclusive", "-R", "http://localhost", "-T")
-        self.assert_noerr("-T")
-        self.assert_err("Invalid server specification", "-R", "reverse")
+    def test_modes(self, _):
         self.assert_noerr("-R", "http://localhost")
+        self.assert_err("expected one argument", "-R")
+        self.assert_err("Invalid server specification", "-R", "reverse")
+
+        self.assert_noerr("-T")
+
+        self.assert_noerr("-U", "http://localhost")
+        self.assert_err("expected one argument", "-U")
+        self.assert_err("Invalid server specification", "-U", "upstream")
+
+        self.assert_noerr("--destination-server", "http://localhost")
+        self.assert_err("expected one argument", "--destination-server")
+        self.assert_err("Invalid server specification", "--destination-server", "manual")
+
+        self.assert_err("mutually exclusive", "-R", "http://localhost", "-T")
 
     def test_client_certs(self):
         with tutils.tmpdir() as confdir: