diff --git a/server/tests/api/object-storage/videos.ts b/server/tests/api/object-storage/videos.ts
index 6c9c224eb..6e6392181 100644
--- a/server/tests/api/object-storage/videos.ts
+++ b/server/tests/api/object-storage/videos.ts
@@ -243,7 +243,7 @@ function runTestSuite (options: {
   })
 
   after(async function () {
-    mockObjectStorage.terminate()
+    await mockObjectStorage.terminate()
 
     await cleanupTests(servers)
   })
@@ -380,8 +380,8 @@ describe('Object storage for videos', function () {
       playlistBucket: 'mybucket',
       webtorrentBucket: 'mybucket',
 
-      playlistPrefix: 'streaming-playlists_',
-      webtorrentPrefix: 'webtorrent_',
+      playlistPrefix: 'streaming-playlists/',
+      webtorrentPrefix: 'webtorrent/',
 
       useMockBaseUrl: true
     })
diff --git a/server/tests/api/server/proxy.ts b/server/tests/api/server/proxy.ts
index d5042ef27..72bd49078 100644
--- a/server/tests/api/server/proxy.ts
+++ b/server/tests/api/server/proxy.ts
@@ -65,7 +65,7 @@ describe('Test proxy', function () {
   })
 
   after(async function () {
-    proxy.terminate()
+    await proxy.terminate()
 
     await cleanupTests(servers)
   })
diff --git a/shared/extra-utils/mock-servers/mock-object-storage.ts b/shared/extra-utils/mock-servers/mock-object-storage.ts
index f1c5a6123..b6071b2f2 100644
--- a/shared/extra-utils/mock-servers/mock-object-storage.ts
+++ b/shared/extra-utils/mock-servers/mock-object-storage.ts
@@ -4,6 +4,7 @@ import { Server } from 'http'
 import { pipeline } from 'stream'
 import { randomInt } from '@shared/core-utils'
 import { ObjectStorageCommand } from '../server'
+import { terminateServer } from './utils'
 
 export class MockObjectStorage {
   private server: Server
@@ -37,6 +38,6 @@ export class MockObjectStorage {
   }
 
   terminate () {
-    if (this.server) this.server.close()
+    return terminateServer(this.server)
   }
 }
diff --git a/shared/extra-utils/mock-servers/mock-plugin-blocklist.ts b/shared/extra-utils/mock-servers/mock-plugin-blocklist.ts
index 6f66bf4f0..6a71532b5 100644
--- a/shared/extra-utils/mock-servers/mock-plugin-blocklist.ts
+++ b/shared/extra-utils/mock-servers/mock-plugin-blocklist.ts
@@ -1,6 +1,7 @@
 import express, { Request, Response } from 'express'
 import { Server } from 'http'
 import { randomInt } from '@shared/core-utils'
+import { terminateServer } from './utils'
 
 type BlocklistResponse = {
   data: {
@@ -32,6 +33,6 @@ export class MockBlocklist {
   }
 
   terminate () {
-    if (this.server) this.server.close()
+    return terminateServer(this.server)
   }
 }
diff --git a/shared/extra-utils/mock-servers/mock-proxy.ts b/shared/extra-utils/mock-servers/mock-proxy.ts
index eb5f177c7..f955d3f9e 100644
--- a/shared/extra-utils/mock-servers/mock-proxy.ts
+++ b/shared/extra-utils/mock-servers/mock-proxy.ts
@@ -2,6 +2,7 @@
 import { createServer, Server } from 'http'
 import proxy from 'proxy'
 import { randomInt } from '@shared/core-utils'
+import { terminateServer } from './utils'
 
 class MockProxy {
   private server: Server
@@ -16,7 +17,7 @@ class MockProxy {
   }
 
   terminate () {
-    if (this.server) this.server.close()
+    return terminateServer(this.server)
   }
 }
 
diff --git a/shared/extra-utils/mock-servers/utils.ts b/shared/extra-utils/mock-servers/utils.ts
new file mode 100644
index 000000000..64d94c868
--- /dev/null
+++ b/shared/extra-utils/mock-servers/utils.ts
@@ -0,0 +1,17 @@
+import { Server } from 'http'
+
+function terminateServer (server: Server) {
+  if (!server) return Promise.resolve()
+
+  return new Promise<void>((res, rej) => {
+    server.close(err => {
+      if (err) return rej(err)
+
+      return res()
+    })
+  })
+}
+
+export {
+  terminateServer
+}