diff --git a/mitmproxy/master.py b/mitmproxy/master.py
index 9e3550dae..2bc78f4b4 100644
--- a/mitmproxy/master.py
+++ b/mitmproxy/master.py
@@ -162,7 +162,7 @@ class Master:
         f.response = None
         f.error = None
 
-        if f.request.http_version == "HTTP/2.0":
+        if f.request.http_version == "HTTP/2.0":  # https://github.com/mitmproxy/mitmproxy/issues/2197
             f.request.http_version = "HTTP/1.1"
             host = f.request.headers.pop(":authority")
             f.request.headers.insert(0, "host", host)
diff --git a/test/mitmproxy/test_flow.py b/test/mitmproxy/test_flow.py
index 9f6ed585c..0b04c4c1b 100644
--- a/test/mitmproxy/test_flow.py
+++ b/test/mitmproxy/test_flow.py
@@ -1,7 +1,8 @@
 import io
+from unittest import mock
 import pytest
 
-from mitmproxy.test import tflow
+from mitmproxy.test import tflow, tutils
 import mitmproxy.io
 from mitmproxy import flowfilter
 from mitmproxy import options
@@ -10,6 +11,7 @@ from mitmproxy.io import tnetstring
 from mitmproxy.exceptions import FlowReadException, ReplayException, ControlException
 from mitmproxy import flow
 from mitmproxy import http
+from mitmproxy.net import http as net_http
 from mitmproxy.proxy.server import DummyServer
 from mitmproxy import master
 from . import tservers
@@ -99,7 +101,9 @@ class TestFlowMaster:
         assert s.flows[0].request.host == "use-this-domain"
 
     def test_replay(self):
-        fm = master.Master(None, DummyServer())
+        opts = options.Options()
+        conf = config.ProxyConfig(opts)
+        fm = master.Master(opts, DummyServer(conf))
         f = tflow.tflow(resp=True)
         f.request.content = None
         with pytest.raises(ReplayException, match="missing"):
@@ -117,6 +121,14 @@ class TestFlowMaster:
         with pytest.raises(ReplayException, match="live"):
             fm.replay_request(f)
 
+        req = tutils.treq(headers=net_http.Headers(((b":authority", b"foo"), (b"header", b"qvalue"), (b"content-length", b"7"))))
+        f = tflow.tflow(req=req)
+        f.request.http_version = "HTTP/2.0"
+        with mock.patch('mitmproxy.proxy.protocol.http_replay.RequestReplayThread.run'):
+            rt = fm.replay_request(f)
+            assert rt.f.request.http_version == "HTTP/1.1"
+            assert ":authority" not in rt.f.request.headers
+
     def test_all(self):
         s = tservers.TestState()
         fm = master.Master(None, DummyServer())