diff --git a/test/pr-e2e-gate-dispatch-recovery.test.ts b/test/pr-e2e-gate-dispatch-recovery.test.ts
index f7f20f163d..665eac9256 100644
--- a/test/pr-e2e-gate-dispatch-recovery.test.ts
+++ b/test/pr-e2e-gate-dispatch-recovery.test.ts
@@ -625,7 +625,18 @@ describe("PR E2E dispatch-not-observed recovery", () => {
     ]);
   });
 
-  it("accepts an exact child authorization after the PATCH response is lost", async () => {
+  it.each([
+    {
+      label: "exact child URL",
+      publishedDetailsUrl: "https://github.com/NVIDIA/NemoClaw/actions/runs/23",
+    },
+    {
+      label: "canonical check URL",
+      publishedDetailsUrl: "https://github.com/NVIDIA/NemoClaw/runs/17",
+    },
+  ])("accepts an exact child authorization with $label after the PATCH response is lost", async ({
+    publishedDetailsUrl,
+  }) => {
     const workDir = fs.mkdtempSync(path.join(os.tmpdir(), "nemoclaw-pr-e2e-auth-response-"));
     const outputPath = path.join(workDir, "github-output");
     fs.writeFileSync(outputPath, "", { mode: 0o600 });
@@ -633,7 +644,7 @@ describe("PR E2E dispatch-not-observed recovery", () => {
     vi.stubEnv("GITHUB_REPOSITORY", "NVIDIA/NemoClaw");
     vi.stubEnv("GITHUB_OUTPUT", outputPath);
     const requests: RecordedGitHubRequest[] = [];
-    let check = reservedCheck();
+    let check: Record<string, unknown> = reservedCheck();
     vi.spyOn(globalThis, "fetch").mockImplementation(
       createGitHubFetchRouter(
         [
@@ -665,9 +676,15 @@ describe("PR E2E dispatch-not-observed recovery", () => {
           githubFetchRoute(
             ({ url, method }) => url.endsWith("/check-runs/17") && method === "PATCH",
             (request) => {
-              check = { ...check, ...((request.body ?? {}) as Record<string, unknown>) };
               const title = (request.body as { output?: { title?: string } } | undefined)?.output
                 ?.title;
+              check = {
+                ...check,
+                ...((request.body ?? {}) as Record<string, unknown>),
+                ...(title?.startsWith("Running ")
+                  ? { details_url: publishedDetailsUrl }
+                  : undefined),
+              };
               return title?.startsWith("Running ")
                 ? new Response("{", { status: 200 })
                 : githubResponse(check);
@@ -697,7 +714,7 @@ describe("PR E2E dispatch-not-observed recovery", () => {
       expect(check).toMatchObject({
         status: "in_progress",
         conclusion: null,
-        details_url: "https://github.com/NVIDIA/NemoClaw/actions/runs/23",
+        details_url: publishedDetailsUrl,
         output: { title: expect.stringMatching(/^Running /u) },
       });
       expect(requests.filter((request) => request.url.endsWith("/dispatches"))).toHaveLength(1);
diff --git a/test/pr-e2e-gate-lifecycle.test.ts b/test/pr-e2e-gate-lifecycle.test.ts
index b0e9765d02..e62ce5139e 100644
--- a/test/pr-e2e-gate-lifecycle.test.ts
+++ b/test/pr-e2e-gate-lifecycle.test.ts
@@ -388,7 +388,7 @@ describe("PR E2E controller lifecycle", () => {
     }
   });
 
-  it("cancels the child and closes the check when startup fails after dispatch", async () => {
+  it("revokes and cancels when a lost PATCH publishes a foreign check URL", async () => {
     const workDir = fs.mkdtempSync(path.join(os.tmpdir(), "nemoclaw-pr-e2e-gate-start-"));
     const outputPath = path.join(workDir, "github-output");
     fs.writeFileSync(outputPath, "", { mode: 0o600 });
@@ -397,6 +397,7 @@ describe("PR E2E controller lifecycle", () => {
     vi.stubEnv("GITHUB_OUTPUT", outputPath);
     const requests: RecordedGitHubRequest[] = [];
     let checkPatches = 0;
+    let failedRunningUpdate: Record<string, unknown> | undefined;
     vi.spyOn(globalThis, "fetch").mockImplementation(
       createGitHubFetchRouter(
         [
@@ -439,11 +440,16 @@ describe("PR E2E controller lifecycle", () => {
             () =>
               githubResponse(
                 exactPrGateCheck({
-                  output: {
-                    title: "Evaluating PR commit",
-                    summary:
-                      "Validating the PR SHA and selecting deterministic E2E jobs and typed targets.",
-                  },
+                  ...(failedRunningUpdate ?? {
+                    output: {
+                      title: "Evaluating PR commit",
+                      summary:
+                        "Validating the PR SHA and selecting deterministic E2E jobs and typed targets.",
+                    },
+                  }),
+                  ...(failedRunningUpdate
+                    ? { details_url: "https://github.com/NVIDIA/NemoClaw/runs/999" }
+                    : undefined),
                 }),
               ),
           ),
@@ -455,6 +461,10 @@ describe("PR E2E controller lifecycle", () => {
             ({ url, method }) => url.endsWith("/check-runs/17") && method === "PATCH",
             (request) => {
               checkPatches += 1;
+              failedRunningUpdate =
+                checkPatches === 2
+                  ? ((request.body ?? {}) as Record<string, unknown>)
+                  : failedRunningUpdate;
               return checkPatches === 2
                 ? githubResponse({ message: "simulated update failure" }, 500)
                 : prGateMutationResponse(request);
diff --git a/tools/e2e/pr-e2e-gate.mts b/tools/e2e/pr-e2e-gate.mts
index 68acd2f168..c478ed51b0 100755
--- a/tools/e2e/pr-e2e-gate.mts
+++ b/tools/e2e/pr-e2e-gate.mts
@@ -1380,6 +1380,7 @@ async function updateRunningCheck(
   },
 ): Promise<void> {
   const childRunUrl = `https://github.com/${context.repository}/actions/runs/${options.childRunId}`;
+  const canonicalCheckUrl = `https://github.com/${context.repository}/runs/${context.checkRunId}`;
   const selectionCount = options.jobs.length + options.targets.length;
   const title = `Running ${selectionCount} E2E ${selectionCount === 1 ? "check" : "checks"}`;
   const summary = `Risk plan ${options.planHash} selected jobs: ${options.jobs.join(", ") || "none"}; targets: ${options.targets.join(", ") || "none"}. Child run: ${childRunUrl}.`;
@@ -1394,7 +1395,7 @@ async function updateRunningCheck(
       title,
       summary,
     });
-    if (check.details_url !== childRunUrl) {
+    if (check.details_url !== childRunUrl && check.details_url !== canonicalCheckUrl) {
       throw new Error("GitHub did not bind the controller check to the selected child run");
     }
   };