diff --git a/bin/run b/bin/run
index 6d90684..1708d35 100755
--- a/bin/run
+++ b/bin/run
@@ -19,6 +19,15 @@ governing permissions and limitations under the License.
 process.stderr.setMaxListeners(30)
 process.stdout.setMaxListeners(30)
 
+// `@oclif/core` v4 exposes `handle` and `flush` as named exports on their
+// respective subpath modules. Passing the module object (instead of the
+// function) to `Promise#catch` / `Promise#then` silently drops the
+// handler: errors escape to Node's default uncaught-exception printer
+// instead of oclif's renderer, and `flush()` is never invoked.
+// Destructure the functions explicitly so both paths run as intended.
+const { handle } = require('@oclif/core/handle')
+const { flush } = require('@oclif/core/flush')
+
 require('../src/').run()
-  .then(() => require('@oclif/core/flush'))
-  .catch(require('@oclif/core/handle'))
+  .then(flush)
+  .catch(handle)
diff --git a/e2e/e2e.js b/e2e/e2e.js
index a50c2fe..c25b77d 100644
--- a/e2e/e2e.js
+++ b/e2e/e2e.js
@@ -10,6 +10,7 @@ governing permissions and limitations under the License.
 */
 
 const execa = require('execa')
+const path = require('path')
 const fs = jest.requireActual('fs')
 const util = require('util')
 const fse = {
@@ -17,8 +18,37 @@ const fse = {
   rm: util.promisify(fs.rm)
 }
 
+const BIN_RUN = path.resolve(__dirname, '../bin/run')
+
 jest.setTimeout(120000)
 
+test('errors render through oclif, not Node\'s uncaught-exception printer', async () => {
+  // Spawns the real bin/run with an argv guaranteed to trigger a flag
+  // parse error from `@oclif/core`. When the bin's `.catch` handler is
+  // wired correctly, oclif's renderer produces a clean single-line
+  // `Error: …` message. When the handler is dropped (regression
+  // tracked in adobe/aio-cli#829 / ACNA-4659), the rejection escapes
+  // to Node and the output instead contains a source frame, a caret,
+  // a stack trace, and a `Node.js vXX` footer. Asserting on the
+  // absence of those Node-specific markers detects the regression
+  // without coupling to oclif's exact prefix.
+  const result = await execa('node', [BIN_RUN, 'app', 'use', '--no-such-flag'],
+    { reject: false })
+
+  // Non-zero exit on a parse error is part of the contract.
+  expect(result.exitCode).not.toBe(0)
+
+  // The user-facing message must be present so the customer knows what
+  // went wrong; the framework renders it on stderr.
+  expect(result.stderr).toMatch(/Nonexistent flag.*--no-such-flag/)
+
+  // None of these substrings should appear: each is a fingerprint of
+  // Node's default unhandled-rejection / uncaught-exception output.
+  expect(result.stderr).not.toMatch(/at processTicksAndRejections/)
+  expect(result.stderr).not.toMatch(/^Node\.js v\d+/m)
+  expect(result.stderr).not.toMatch(/^\s+\^\s*$/m)
+})
+
 test('cli init test', async () => {
   const testFolder = 'e2e_test_run'