From abff4183b44fc246e8b019163999130a92f6cbae Mon Sep 17 00:00:00 2001
From: J Logan <john_logan@apple.com>
Date: Thu, 6 Aug 2026 20:31:13 -0700
Subject: [PATCH] Integration test: fix username/uid flake. (#2086)

---
 Tests/IntegrationTests/Run/TestCLIRunLifecycle.swift | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Tests/IntegrationTests/Run/TestCLIRunLifecycle.swift b/Tests/IntegrationTests/Run/TestCLIRunLifecycle.swift
index 720d885d..ce7cc619 100644
--- a/Tests/IntegrationTests/Run/TestCLIRunLifecycle.swift
+++ b/Tests/IntegrationTests/Run/TestCLIRunLifecycle.swift
@@ -29,7 +29,7 @@ struct TestCLIRunLifecycle {
             // First attempt with an invalid user — must fail.
             let failResult = try f.run([
                 "run", "--rm", "--name", name, "-d",
-                "--user", f.testID,  // f.testID won't exist in /etc/passwd
+                "--user", "u-\(f.testID)",  // non-numeric, guaranteed not to exist in /etc/passwd
                 image, "sleep", "infinity",
             ])
             #expect(failResult.status != 0, "expected run to fail with invalid user")