diff --git a/src/apps/cli/testdeno/test-p2p-peers-local-relay.ts b/src/apps/cli/testdeno/test-p2p-peers-local-relay.ts
index f73fe35..c87c8a9 100644
--- a/src/apps/cli/testdeno/test-p2p-peers-local-relay.ts
+++ b/src/apps/cli/testdeno/test-p2p-peers-local-relay.ts
@@ -9,6 +9,9 @@ Deno.test("p2p-peers: discovers host through local relay", async () => {
     const roomId = Deno.env.get("ROOM_ID") ?? `room-${Date.now()}`;
     const passphrase = Deno.env.get("PASSPHRASE") ?? "test";
     const timeoutSeconds = Number(Deno.env.get("TIMEOUT_SECONDS") ?? "8");
+    const nonce = `${Date.now()}-${crypto.randomUUID().slice(0, 8)}`;
+    const hostPeerName = Deno.env.get("HOST_PEER_NAME") ?? `p2p-host-${nonce}`;
+    const clientPeerName = Deno.env.get("CLIENT_PEER_NAME") ?? `p2p-client-${nonce}`;
 
     await using workDir = await TempDir.create("livesync-cli-p2p-peers-local-relay");
     const hostVault = workDir.join("vault-host");
@@ -24,15 +27,16 @@ Deno.test("p2p-peers: discovers host through local relay", async () => {
         await initSettingsFile(clientSettings);
         await applyP2pSettings(hostSettings, roomId, passphrase, "self-hosted-livesync-cli-tests", relay);
         await applyP2pSettings(clientSettings, roomId, passphrase, "self-hosted-livesync-cli-tests", relay);
-        await applyP2pTestTweaks(hostSettings, "p2p-host", passphrase);
-        await applyP2pTestTweaks(clientSettings, "p2p-client", passphrase);
+        await applyP2pTestTweaks(hostSettings, hostPeerName, passphrase);
+        await applyP2pTestTweaks(clientSettings, clientPeerName, passphrase);
 
         const host = startCliInBackground(hostVault, "--settings", hostSettings, "p2p-host");
         try {
             await host.waitUntilContains("P2P host is running", 20000);
-            const peer = await discoverPeer(clientVault, clientSettings, timeoutSeconds);
+            const peer = await discoverPeer(clientVault, clientSettings, timeoutSeconds, hostPeerName);
             assert(peer.id.length > 0);
             assert(peer.name.length > 0);
+            assert(peer.name === hostPeerName, `expected peer '${hostPeerName}', got '${peer.name}'`);
         } finally {
             await host.stop();
         }
diff --git a/src/apps/cli/testdeno/test-p2p-sync.ts b/src/apps/cli/testdeno/test-p2p-sync.ts
index 970b4e9..2a50745 100644
--- a/src/apps/cli/testdeno/test-p2p-sync.ts
+++ b/src/apps/cli/testdeno/test-p2p-sync.ts
@@ -11,6 +11,9 @@ Deno.test("p2p-sync: discovers peer and completes sync", async () => {
     const passphrase = Deno.env.get("PASSPHRASE") ?? "test";
     const peersTimeout = Number(Deno.env.get("PEERS_TIMEOUT") ?? "12");
     const syncTimeout = Number(Deno.env.get("SYNC_TIMEOUT") ?? "15");
+    const nonce = `${Date.now()}-${crypto.randomUUID().slice(0, 8)}`;
+    const hostPeerName = Deno.env.get("HOST_PEER_NAME") ?? `p2p-host-${nonce}`;
+    const clientPeerName = Deno.env.get("CLIENT_PEER_NAME") ?? `p2p-client-${nonce}`;
 
     await using workDir = await TempDir.create("livesync-cli-p2p-sync");
     const hostVault = workDir.join("vault-host");
@@ -26,8 +29,8 @@ Deno.test("p2p-sync: discovers peer and completes sync", async () => {
         await initSettingsFile(clientSettings);
         await applyP2pSettings(hostSettings, roomId, passphrase, "self-hosted-livesync-cli-tests", relay);
         await applyP2pSettings(clientSettings, roomId, passphrase, "self-hosted-livesync-cli-tests", relay);
-        await applyP2pTestTweaks(hostSettings, "p2p-host", passphrase);
-        await applyP2pTestTweaks(clientSettings, "p2p-client", passphrase);
+        await applyP2pTestTweaks(hostSettings, hostPeerName, passphrase);
+        await applyP2pTestTweaks(clientSettings, clientPeerName, passphrase);
 
         const host = startCliInBackground(hostVault, "--settings", hostSettings, "p2p-host");
         try {
@@ -36,7 +39,7 @@ Deno.test("p2p-sync: discovers peer and completes sync", async () => {
                 clientVault,
                 clientSettings,
                 peersTimeout,
-                Deno.env.get("TARGET_PEER") ?? undefined
+                Deno.env.get("TARGET_PEER") ?? hostPeerName
             );
             const syncResult = await runCli(
                 clientVault,
diff --git a/src/apps/cli/testdeno/test-p2p-three-nodes-conflict.ts b/src/apps/cli/testdeno/test-p2p-three-nodes-conflict.ts
index 744692e..6752f9b 100644
--- a/src/apps/cli/testdeno/test-p2p-three-nodes-conflict.ts
+++ b/src/apps/cli/testdeno/test-p2p-three-nodes-conflict.ts
@@ -1,6 +1,6 @@
 import { assert } from "@std/assert";
 import { TempDir } from "./helpers/temp.ts";
-import { applyP2pSettings, initSettingsFile } from "./helpers/settings.ts";
+import { applyP2pSettings, applyP2pTestTweaks, initSettingsFile } from "./helpers/settings.ts";
 import { startCliInBackground } from "./helpers/backgroundCli.ts";
 import { discoverPeer, maybeStartLocalRelay, stopLocalRelayIfStarted } from "./helpers/p2p.ts";
 import { jsonStringField, runCliOrFail, runCliWithInputOrFail, sanitiseCatStdout } from "./helpers/cli.ts";
@@ -12,6 +12,10 @@ Deno.test("p2p: three nodes detect and resolve conflicts", async () => {
     const appId = Deno.env.get("APP_ID") ?? "self-hosted-livesync-cli-tests";
     const peersTimeout = Number(Deno.env.get("PEERS_TIMEOUT") ?? "10");
     const syncTimeout = Number(Deno.env.get("SYNC_TIMEOUT") ?? "15");
+    const nonce = `${Date.now()}-${crypto.randomUUID().slice(0, 8)}`;
+    const hostPeerName = Deno.env.get("HOST_PEER_NAME") ?? `p2p-host-${nonce}`;
+    const peerNameB = Deno.env.get("PEER_NAME_B") ?? `p2p-client-b-${nonce}`;
+    const peerNameC = Deno.env.get("PEER_NAME_C") ?? `p2p-client-c-${nonce}`;
 
     await using workDir = await TempDir.create("livesync-cli-p2p-3nodes");
     const vaultA = workDir.join("vault-a");
@@ -26,16 +30,21 @@ Deno.test("p2p: three nodes detect and resolve conflicts", async () => {
 
     const relayStarted = await maybeStartLocalRelay(relay);
     try {
-        for (const settings of [settingsA, settingsB, settingsC]) {
-            await initSettingsFile(settings);
-            await applyP2pSettings(settings, roomId, passphrase, appId, relay);
-        }
+        await initSettingsFile(settingsA);
+        await initSettingsFile(settingsB);
+        await initSettingsFile(settingsC);
+        await applyP2pSettings(settingsA, roomId, passphrase, appId, relay);
+        await applyP2pSettings(settingsB, roomId, passphrase, appId, relay);
+        await applyP2pSettings(settingsC, roomId, passphrase, appId, relay);
+        await applyP2pTestTweaks(settingsA, hostPeerName, passphrase);
+        await applyP2pTestTweaks(settingsB, peerNameB, passphrase);
+        await applyP2pTestTweaks(settingsC, peerNameC, passphrase);
 
         const host = startCliInBackground(vaultA, "--settings", settingsA, "p2p-host");
         try {
             await host.waitUntilContains("P2P host is running", 20000);
-            const peerFromB = await discoverPeer(vaultB, settingsB, peersTimeout);
-            const peerFromC = await discoverPeer(vaultC, settingsC, peersTimeout);
+            const peerFromB = await discoverPeer(vaultB, settingsB, peersTimeout, hostPeerName);
+            const peerFromC = await discoverPeer(vaultC, settingsC, peersTimeout, hostPeerName);
             const targetPath = "p2p/conflicted-from-two-clients.txt";
 
             await runCliWithInputOrFail("from-client-b-v1\n", vaultB, "--settings", settingsB, "put", targetPath);