diff --git a/tests/e2e/dm-manual.test.ts b/tests/e2e/dm-manual.test.ts
index 50c6df54..e8c6677b 100644
--- a/tests/e2e/dm-manual.test.ts
+++ b/tests/e2e/dm-manual.test.ts
@@ -13,10 +13,12 @@ import { mkdirSync, rmSync, existsSync, writeFileSync } from 'node:fs';
 import { join } from 'node:path';
 import { tmpdir } from 'node:os';
 import type { DirectMessage } from '../../types';
+// One definition (env-overridable): three local copies all named the deleted v1
+// file, whose networkId 3 stopped matching `network: 'testnet'` at the cutover.
+import { TRUSTBASE_URL } from './support/staging';
 
 const rand = () => Math.random().toString(36).slice(2, 8);
 
-const TRUSTBASE_URL = 'https://raw.githubusercontent.com/unicitynetwork/unicity-ids/refs/heads/main/bft-trustbase.testnet.json';
 const DEFAULT_API_KEY = 'sk_06365a9c44654841a366068bcfc68986';
 
 // Timeout for waiting for DM (60 seconds)
diff --git a/tests/e2e/dm-nip17.test.ts b/tests/e2e/dm-nip17.test.ts
index 5a3d54a6..074b455c 100644
--- a/tests/e2e/dm-nip17.test.ts
+++ b/tests/e2e/dm-nip17.test.ts
@@ -16,10 +16,12 @@ import { mkdirSync, rmSync, existsSync, writeFileSync } from 'node:fs';
 import { join } from 'node:path';
 import { tmpdir } from 'node:os';
 import type { DirectMessage } from '../../types';
+// One definition (env-overridable): three local copies all named the deleted v1
+// file, whose networkId 3 stopped matching `network: 'testnet'` at the cutover.
+import { TRUSTBASE_URL } from './support/staging';
 
 const rand = () => Math.random().toString(36).slice(2, 8);
 
-const TRUSTBASE_URL = 'https://raw.githubusercontent.com/unicitynetwork/unicity-ids/refs/heads/main/bft-trustbase.testnet.json';
 const DEFAULT_API_KEY = 'sk_06365a9c44654841a366068bcfc68986';
 
 function makeTempDirs(label: string) {
diff --git a/tests/e2e/wallet-clear.test.ts b/tests/e2e/wallet-clear.test.ts
index e0f48cc7..4821d12f 100644
--- a/tests/e2e/wallet-clear.test.ts
+++ b/tests/e2e/wallet-clear.test.ts
@@ -22,10 +22,12 @@ import { STORAGE_KEYS_GLOBAL } from '../../constants';
 import { mkdirSync, rmSync, existsSync, writeFileSync } from 'node:fs';
 import { join } from 'node:path';
 import { tmpdir } from 'node:os';
+// One definition (env-overridable): three local copies all named the deleted v1
+// file, whose networkId 3 stopped matching `network: 'testnet'` at the cutover.
+import { TRUSTBASE_URL } from './support/staging';
 
 const rand = () => Math.random().toString(36).slice(2, 8);
 
-const TRUSTBASE_URL = 'https://raw.githubusercontent.com/unicitynetwork/unicity-ids/refs/heads/main/bft-trustbase.testnet.json';
 const DEFAULT_API_KEY = 'sk_06365a9c44654841a366068bcfc68986';
 
 function makeTempDirs(label: string) {