diff --git a/mitmproxy/cmdline.py b/mitmproxy/cmdline.py
index d46051a23..551fffa07 100644
--- a/mitmproxy/cmdline.py
+++ b/mitmproxy/cmdline.py
@@ -323,7 +323,7 @@ def basic_options(parser):
 
 
 def proxy_modes(parser):
-    group = parser.add_argument_group("Proxy Modes").add_mutually_exclusive_group()
+    group = parser.add_argument_group("Proxy Modes")
     group.add_argument(
         "-R", "--reverse",
         action="store",
diff --git a/test/mitmproxy/test_proxy.py b/test/mitmproxy/test_proxy.py
index 49c9c9093..cd24fc9fb 100644
--- a/test/mitmproxy/test_proxy.py
+++ b/test/mitmproxy/test_proxy.py
@@ -96,7 +96,7 @@ class TestProcessProxyOptions:
         self.assert_err("expected one argument", "--upstream-auth")
         self.assert_err("Invalid upstream auth specification", "--upstream-auth", "test")
 
-        self.assert_err("not allowed with", "-R", "http://localhost", "-T")
+        self.assert_err("mutually exclusive", "-R", "http://localhost", "-T")
 
     def test_socks_auth(self):
         self.assert_err("Proxy Authentication not supported in SOCKS mode.", "--socks", "--nonanonymous")