diff --git a/synapse/tests/test_tools_storm.py b/synapse/tests/test_tools_storm.py
index 3dd3b9722e0..a93713a19be 100644
--- a/synapse/tests/test_tools_storm.py
+++ b/synapse/tests/test_tools_storm.py
@@ -1,5 +1,9 @@
 import os
+import sys
+import signal
 import asyncio
+import multiprocessing
+
 import synapse.tests.utils as s_test
 
 from prompt_toolkit.document import Document
@@ -7,10 +11,49 @@
 
 import synapse.exc as s_exc
 import synapse.common as s_common
+import synapse.telepath as s_telepath
+
+import synapse.lib.coro as s_coro
 import synapse.lib.output as s_output
 import synapse.lib.msgpack as s_msgpack
 import synapse.tools.storm as s_t_storm
 
+def run_cli_till_print(url, evt1):
+    '''
+    Run the stormCLI until we get a print mesg then set the event.
+
+    This is a Process target.
+    '''
+    async def main():
+        outp = s_output.OutPutStr()  # Capture output instead of sending it to stdout
+        async with await s_telepath.openurl(url) as proxy:
+            async with await s_t_storm.StormCli.anit(proxy, outp=outp) as scli:
+                cmdqueue = asyncio.Queue()
+                await cmdqueue.put('while (true) { $lib.print(go) $lib.time.sleep(1) }')
+                await cmdqueue.put('!quit')
+
+                async def fake_prompt():
+                    return await cmdqueue.get()
+
+                scli.prompt = fake_prompt
+
+                d = {'evt1': False}
+                async def onmesg(event):
+                    if d.get('evt1'):
+                        return
+                    mesg = event[1].get('mesg')
+                    if mesg[0] != 'print':
+                        return
+                    evt1.set()
+                    d['evt1'] = True
+
+                with scli.onWith('storm:mesg', onmesg):
+                    await scli.addSignalHandlers()
+                    await scli.runCmdLoop()
+
+    asyncio.run(main())
+    sys.exit(137)
+
 class StormCliTest(s_test.SynTest):
 
     async def test_tools_storm(self):
@@ -410,3 +453,23 @@ async def fake_prompt():
                     outp.expect('<ctrl-c>')
                     outp.expect('o/')
                     self.true(scli.isfini)
+
+    async def test_storm_cmdloop_sigint(self):
+        '''
+        Test interrupting a long-running query in the command loop with a process target and SIGINT.
+        '''
+
+        async with self.getTestCore() as core:
+            url = core.getLocalUrl()
+
+            ctx = multiprocessing.get_context('spawn')
+
+            evt1 = ctx.Event()
+
+            proc = ctx.Process(target=run_cli_till_print, args=(url, evt1,))
+            proc.start()
+
+            self.true(await s_coro.executor(evt1.wait, timeout=30))
+            os.kill(proc.pid, signal.SIGINT)
+            proc.join(timeout=30)
+            self.eq(proc.exitcode, 137)