diff --git a/.coveragerc b/.coveragerc
index 09170dc..9243873 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -1,5 +1,6 @@
 [run]
 omit =
+concurrency = multiprocessing
 [report]
 exclude_lines =
     pragma: no cover
diff --git a/hippolyzer/apps/proxy.py b/hippolyzer/apps/proxy.py
index 260322e..8048cdc 100644
--- a/hippolyzer/apps/proxy.py
+++ b/hippolyzer/apps/proxy.py
@@ -89,6 +89,7 @@ def run_http_proxy_process(proxy_host, http_proxy_port, flow_context: HTTPFlowCo
     mitmproxy_master = create_http_proxy(proxy_host, http_proxy_port, flow_context)
     mitmproxy_master.start_server()
     gc.freeze()
+    flow_context.mitmproxy_ready.set()
     mitm_loop.run_forever()
 
 
diff --git a/hippolyzer/lib/proxy/http_proxy.py b/hippolyzer/lib/proxy/http_proxy.py
index a58f488..78aadd0 100644
--- a/hippolyzer/lib/proxy/http_proxy.py
+++ b/hippolyzer/lib/proxy/http_proxy.py
@@ -82,6 +82,7 @@ class HTTPFlowContext:
         self.from_proxy_queue = multiprocessing.Queue()
         self.to_proxy_queue = multiprocessing.Queue()
         self.shutdown_signal = multiprocessing.Event()
+        self.mitmproxy_ready = multiprocessing.Event()
 
 
 class IPCInterceptionAddon:
diff --git a/tests/proxy/integration/test_http.py b/tests/proxy/integration/test_http.py
index 77fe1a9..4774a3d 100644
--- a/tests/proxy/integration/test_http.py
+++ b/tests/proxy/integration/test_http.py
@@ -2,6 +2,7 @@ from __future__ import annotations
 
 import asyncio
 import math
+import multiprocessing
 
 import aioresponses
 from mitmproxy.net import http
@@ -9,6 +10,7 @@ from mitmproxy.test import tflow, tutils
 from mitmproxy.http import HTTPFlow
 from yarl import URL
 
+from hippolyzer.apps.proxy import run_http_proxy_process
 from hippolyzer.lib.base.datatypes import Vector3
 from hippolyzer.lib.proxy.addon_utils import BaseAddon
 from hippolyzer.lib.proxy.addons import AddonManager
@@ -105,7 +107,6 @@ class TestCapsClient(BaseProxyTest):
     def setUp(self) -> None:
         super().setUp()
         self._setup_default_circuit()
-        self.caps = {}
         self.caps_client = self.session.main_region.caps_client
 
     async def test_requests_proxied_by_default(self):
@@ -117,3 +118,37 @@ class TestCapsClient(BaseProxyTest):
         # Request should have been proxied, with a header marking it
         self.assertEqual(kwargs['headers']["X-Hippo-Injected"], "1")
         self.assertEqual(kwargs['proxy'], "http://127.0.0.1:9062")
+
+
+class TestMITMProxy(BaseProxyTest):
+    def setUp(self) -> None:
+        super().setUp()
+        self._setup_default_circuit()
+        self.caps_client = self.session.main_region.caps_client
+
+    def test_mitmproxy_works(self):
+        proxy_port = 9905
+        self.session_manager.settings.HTTP_PROXY_PORT = proxy_port
+
+        http_proc = multiprocessing.Process(
+            target=run_http_proxy_process,
+            args=("127.0.0.1", proxy_port, self.session_manager.flow_context),
+            daemon=True,
+        )
+        http_proc.start()
+
+        self.session_manager.flow_context.mitmproxy_ready.wait(1.0)
+
+        http_event_manager = MITMProxyEventManager(self.session_manager, self.session_manager.flow_context)
+
+        async def _request_example_com():
+            # Pump callbacks from mitmproxy
+            asyncio.create_task(http_event_manager.run())
+            try:
+                async with self.caps_client.get("http://example.com/", timeout=0.3) as resp:
+                    self.assertIn(b"Example Domain", await resp.read())
+            finally:
+                # Tell the event pump and mitmproxy they need to shut down
+                self.session_manager.flow_context.shutdown_signal.set()
+        asyncio.run(_request_example_com())
+        http_proc.join()