diff --git a/python/ql/lib/semmle/python/frameworks/Socketio.qll b/python/ql/lib/semmle/python/frameworks/Socketio.qll
index ca873d8ecf2..3df1901a1dd 100644
--- a/python/ql/lib/semmle/python/frameworks/Socketio.qll
+++ b/python/ql/lib/semmle/python/frameworks/Socketio.qll
@@ -88,7 +88,11 @@ module SocketIO {
     }
 
     /** Gets a reference to an instance of a subclass of `socketio.Namespace` or `socketio.AsyncNamespace`. */
-    API::Node instance() { result = subclassRef().getAnInstance() }
+    API::Node instance() {
+      result = subclassRef().getAnInstance()
+      or
+      result = subclassRef().getAMember().getSelfParameter()
+    }
 
     /** A socketio Namespace class. */
     class NamespaceClass extends Class {
diff --git a/python/ql/test/library-tests/frameworks/socketio/taint_test.py b/python/ql/test/library-tests/frameworks/socketio/taint_test.py
index 0073e36ff60..343c093feeb 100644
--- a/python/ql/test/library-tests/frameworks/socketio/taint_test.py
+++ b/python/ql/test/library-tests/frameworks/socketio/taint_test.py
@@ -22,34 +22,45 @@ def event1(sid, data): # $ requestHandler routedParameter=data
     ensure_tainted(data)  # $ tainted
     res = sio.call("e1", sid=sid)
     ensure_tainted(res)  # $ tainted
-    sio.emit("e2", "hi", to=sid, callback=lambda x: ensure_tainted(x))   # $ tainted
-    sio.send("hi", to=sid, callback=lambda x: ensure_tainted(x))   # $ tainted
+    sio.emit("e2", "hi", to=sid, callback=lambda x: ensure_tainted(x))   # $ tainted $ requestHandler routedParameter=x
+    sio.send("hi", to=sid, callback=lambda x: ensure_tainted(x))   # $ tainted $ requestHandler routedParameter=x
 
 class MyNamespace(socketio.Namespace):
     def on_event2(self, sid, data):  # $ requestHandler routedParameter=data
         ensure_not_tainted(self, sid)
-        ensure_tainted(data)
+        ensure_tainted(data)  # $ tainted
         res = self.call("e1", sid=sid) 
         ensure_tainted(res)  # $ tainted
-        self.emit("e2", "hi", to=sid, callback=lambda x: ensure_tainted(x))   # $ tainted
-        self.send("hi", to=sid, callback=lambda x: ensure_tainted(x))   # $ tainted
+        self.emit("e2", "hi", to=sid, callback=lambda x: ensure_tainted(x))   # $ tainted $ requestHandler routedParameter=x
+        self.send("hi", to=sid, callback=lambda x: ensure_tainted(x))   # $ tainted $ requestHandler routedParameter=x
 
 sio.register_namespace(MyNamespace("/ns"))
 
 asio = socketio.AsyncServer(async_mode='asgi')
 
 @asio.event
-async def event3(sid, data): # $ requestHandler routedParameter=sid routedParameter=data
+async def event3(sid, data): # $ requestHandler routedParameter=data
     ensure_not_tainted(sid)
     ensure_tainted(data)  # $ tainted
     res = await asio.call("e1", sid=sid)
     ensure_tainted(res)  # $ tainted
-    await asio.emit("e2", "hi", to=sid, callback=lambda x: ensure_tainted(x))   # $ tainted
-    await asio.send("hi", to=sid, callback=lambda x: ensure_tainted(x))   # $ tainted
+    await asio.emit("e2", "hi", to=sid, callback=lambda x: ensure_tainted(x))   # $ tainted $ requestHandler routedParameter=x
+    await asio.send("hi", to=sid, callback=lambda x: ensure_tainted(x))   # $ tainted $ requestHandler routedParameter=x
+
+class MyAsyncNamespace(socketio.AsyncNamespace):
+    async def on_event4(self, sid, data):  # $ requestHandler routedParameter=data
+        ensure_not_tainted(self, sid)
+        ensure_tainted(data)  # $ tainted
+        res = await self.call("e1", sid=sid) 
+        ensure_tainted(res)  # $ tainted
+        await self.emit("e2", "hi", to=sid, callback=lambda x: ensure_tainted(x))   # $ tainted $ requestHandler routedParameter=x
+        await self.send("hi", to=sid, callback=lambda x: ensure_tainted(x))   # $ tainted $ requestHandler routedParameter=x
+
+asio.register_namespace(MyAsyncNamespace("/ns"))
 
 if __name__ == "__main__":
     
-    if "--async" in sys.argv:
+    if "--async" in sys.argv: # $ threatModelSource[commandargs]=sys.argv
         import uvicorn
         app = socketio.ASGIApp(asio)
         uvicorn.run(app, host='127.0.0.1', port=8000)