diff --git a/packages/embed/tests/e2e/session-canonicalize.it.test.ts b/packages/embed/tests/e2e/session-canonicalize.it.test.ts
index 86d5e236b..201d11156 100644
--- a/packages/embed/tests/e2e/session-canonicalize.it.test.ts
+++ b/packages/embed/tests/e2e/session-canonicalize.it.test.ts
@@ -6,28 +6,56 @@ import {openPanel} from './helpers/panel.js'
 
 const RAW_HARNESS_ID = '43548fd1-0000-4220-acf0-014b10b5815f'
 const EXTERNAL_TITLE = 'a session started outside conciv'
+const NEWER_HARNESS_ID = '9f2c77aa-1111-4a10-b3d1-77c0a2e9b004'
+const NEWER_TITLE = 'the newest session outside conciv'
 
 const suite = setupWidgetSuite({
-  history: [{id: RAW_HARNESS_ID, derivedTitle: EXTERNAL_TITLE, updatedAt: Date.now(), messageCount: 3}],
+  history: [
+    {id: NEWER_HARNESS_ID, derivedTitle: NEWER_TITLE, updatedAt: Date.now(), messageCount: 1},
+    {id: RAW_HARNESS_ID, derivedTitle: EXTERNAL_TITLE, updatedAt: Date.now() - 60_000, messageCount: 3},
+  ],
 })
 
 test.describe('switching to a harness session conciv has never adopted', () => {
   test('lands the panel on the canonical conciv session route, not the raw harness id', async ({page}) => {
     test.setTimeout(180_000)
-    const listed = await suite.kit().rpc.sessions.list()
-    expect(listed.map((meta) => meta.id)).toContain(RAW_HARNESS_ID)
+    const adoptedExternalId = async (): Promise<string | undefined> => {
+      const metas = await suite.kit().rpc.sessions.list()
+      return metas.find((meta) => meta.title === EXTERNAL_TITLE && meta.id.startsWith('conciv_'))?.id
+    }
+
+    const listed = (await suite.kit().rpc.sessions.list()).map((meta) => meta.id)
+    expect(listed).toContain(NEWER_HARNESS_ID)
+    expect(listed).toContain(RAW_HARNESS_ID)
 
     await page.goto(suite.host().base, {waitUntil: 'domcontentloaded'})
     await openPanel(page)
 
+    await until(
+      async () => {
+        const ids = (await suite.kit().rpc.sessions.list()).map((meta) => meta.id)
+        return !ids.includes(NEWER_HARNESS_ID) && ids.includes(RAW_HARNESS_ID)
+      },
+      {hangGuardMs: 30_000, intervalMs: 100},
+    )
+    const afterWarmResolve = (await suite.kit().rpc.sessions.list()).map((meta) => meta.id)
+    expect(afterWarmResolve).not.toContain(NEWER_HARNESS_ID)
+    expect(afterWarmResolve).toContain(RAW_HARNESS_ID)
+
     await page.getByRole('button', {name: /^Session: /}).click()
-    await page.getByRole('option', {name: new RegExp(EXTERNAL_TITLE)}).click()
+    const option = page.getByRole('option', {name: new RegExp(EXTERNAL_TITLE)})
+    await expect(option).toBeVisible({timeout: 30_000})
+    await option.click()
 
     await expect(page.getByRole('button', {name: `Session: ${EXTERNAL_TITLE}`})).toBeVisible({timeout: 30_000})
-    await until(async () => (await currentHref(suite.kit())).startsWith('/panel/conciv_'), {
-      hangGuardMs: 30_000,
-      intervalMs: 100,
-    })
+    await until(
+      async () => {
+        const canonicalId = await adoptedExternalId()
+        if (!canonicalId) return false
+        return (await currentHref(suite.kit())).includes(canonicalId)
+      },
+      {hangGuardMs: 30_000, intervalMs: 100},
+    )
 
     const adopted = await suite.kit().rpc.sessions.resolve({id: RAW_HARNESS_ID})
     const href = await currentHref(suite.kit())