diff --git a/core/test/connectors.test.js b/core/test/connectors.test.js
index 2603ab2d..be57b6fb 100644
--- a/core/test/connectors.test.js
+++ b/core/test/connectors.test.js
@@ -656,14 +656,24 @@ test('an address saved by an older version is dropped from state.json at start,
 
   const warns = []
   const realRename = fsp.rename
-  fsp.rename = async (from, to) => {
-    if (to === file) await new Promise(resolve => setTimeout(resolve, SLOW_WRITE_MS))
-    return realRename(from, to)
-  }
-  syncBuiltinESMExports()
-  const second = setup({ home, warns })
-  t.after(() => second.ctx.dispose())
+  // #1224: the count is what keeps this case honest. The delay only bites while `store.js` takes
+  // `rename` from `node:fs/promises` as a named import — any other path (a callback promisify, a
+  // copy) leaves the wrapper installed and never called, and the case then passes on timing instead
+  // of on the wait below. Pinned, not assumed: the wrapper must have run at least once by the end.
+  // It pins the path being used, not that the delay took effect (`SLOW_WRITE_MS = 0` still calls it).
+  let renameCalls = 0
+  let second
+  t.after(() => second?.ctx.dispose())
+  // #1224: installed inside the try, so a `setup()` that throws cannot leave the wrapper on
+  // `fsp.rename` for the tests after this one; the finally below still restores it.
   try {
+    fsp.rename = async (from, to) => {
+      renameCalls += 1
+      if (to === file) await new Promise(resolve => setTimeout(resolve, SLOW_WRITE_MS))
+      return realRename(from, to)
+    }
+    syncBuiltinESMExports()
+    second = setup({ home, warns })
     await untilMounted(second.mounts, 1)
     assert.equal(second.mounts[0].config.url, 'https://composio.test/tool_router/trs_1/mcp')
     assert.deepEqual(second.mounts[0].config.headers, { 'x-api-key': key })
@@ -672,6 +682,7 @@ test('an address saved by an older version is dropped from state.json at start,
     assert.ok(!text.includes('LEGACYCREDENTIAL'))
     assert.ok(!text.includes('composio.test/tool_router'))
     assert.deepEqual(JSON.parse(text).connectors.composio.session, { id: 'trs_1', apps: ['gmail'] })
+    assert.ok(renameCalls >= 1, 'the wrapper never ran — store no longer uses the named rename import')
   } finally {
     fsp.rename = realRename
     syncBuiltinESMExports()
diff --git a/patches/ds-bot/0001-core-fixes.patch b/patches/ds-bot/0001-core-fixes.patch
index 27b0064a..393a465d 100644
--- a/patches/ds-bot/0001-core-fixes.patch
+++ b/patches/ds-bot/0001-core-fixes.patch
@@ -6166,7 +6166,7 @@ diff --git a/test/connectors.test.js b/test/connectors.test.js
  })
  
  test('a GitHub address without https refuses to send the token', async (t) => {
-@@ -165,10 +165,603 @@ test('a GitHub address without https refuses to send the token', async (t) => {
+@@ -165,10 +165,614 @@
    let asked = false
    globalThis.fetch = async () => { asked = true; return answer(200, { login: 'octo' }) }
    const { ctx, home, mounts } = setup({ github: { url: 'http://mcp.test/', api: 'https://gh.test' } })
@@ -6617,14 +6617,24 @@ diff --git a/test/connectors.test.js b/test/connectors.test.js
 +
 +  const warns = []
 +  const realRename = fsp.rename
-+  fsp.rename = async (from, to) => {
-+    if (to === file) await new Promise(resolve => setTimeout(resolve, SLOW_WRITE_MS))
-+    return realRename(from, to)
-+  }
-+  syncBuiltinESMExports()
-+  const second = setup({ home, warns })
-+  t.after(() => second.ctx.dispose())
++  // #1224: the count is what keeps this case honest. The delay only bites while `store.js` takes
++  // `rename` from `node:fs/promises` as a named import — any other path (a callback promisify, a
++  // copy) leaves the wrapper installed and never called, and the case then passes on timing instead
++  // of on the wait below. Pinned, not assumed: the wrapper must have run at least once by the end.
++  // It pins the path being used, not that the delay took effect (`SLOW_WRITE_MS = 0` still calls it).
++  let renameCalls = 0
++  let second
++  t.after(() => second?.ctx.dispose())
++  // #1224: installed inside the try, so a `setup()` that throws cannot leave the wrapper on
++  // `fsp.rename` for the tests after this one; the finally below still restores it.
 +  try {
++    fsp.rename = async (from, to) => {
++      renameCalls += 1
++      if (to === file) await new Promise(resolve => setTimeout(resolve, SLOW_WRITE_MS))
++      return realRename(from, to)
++    }
++    syncBuiltinESMExports()
++    second = setup({ home, warns })
 +    await untilMounted(second.mounts, 1)
 +    assert.equal(second.mounts[0].config.url, 'https://composio.test/tool_router/trs_1/mcp')
 +    assert.deepEqual(second.mounts[0].config.headers, { 'x-api-key': key })
@@ -6633,6 +6643,7 @@ diff --git a/test/connectors.test.js b/test/connectors.test.js
 +    assert.ok(!text.includes('LEGACYCREDENTIAL'))
 +    assert.ok(!text.includes('composio.test/tool_router'))
 +    assert.deepEqual(JSON.parse(text).connectors.composio.session, { id: 'trs_1', apps: ['gmail'] })
++    assert.ok(renameCalls >= 1, 'the wrapper never ran — store no longer uses the named rename import')
 +  } finally {
 +    fsp.rename = realRename
 +    syncBuiltinESMExports()