diff --git a/server/tests/api/videos/multiple-servers.ts b/server/tests/api/videos/multiple-servers.ts
index ecdd36613..854958f80 100644
--- a/server/tests/api/videos/multiple-servers.ts
+++ b/server/tests/api/videos/multiple-servers.ts
@@ -207,7 +207,7 @@ describe('Test multiple servers', function () {
             },
             {
               resolution: 720,
-              size: 788000
+              size: 750000
             }
           ],
           thumbnailfile: 'thumbnail',
diff --git a/server/tests/shared/checks.ts b/server/tests/shared/checks.ts
index 8c8260088..dcc16d7ea 100644
--- a/server/tests/shared/checks.ts
+++ b/server/tests/shared/checks.ts
@@ -35,8 +35,8 @@ async function testImage (url: string, imageName: string, imageHTTPPath: string,
   const body = res.body
 
   const data = await readFile(join(root(), 'server', 'tests', 'fixtures', imageName + extension))
-  const minLength = data.length - ((30 * data.length) / 100)
-  const maxLength = data.length + ((30 * data.length) / 100)
+  const minLength = data.length - ((40 * data.length) / 100)
+  const maxLength = data.length + ((40 * data.length) / 100)
 
   expect(body.length).to.be.above(minLength, 'the generated image is way smaller than the recorded fixture')
   expect(body.length).to.be.below(maxLength, 'the generated image is way larger than the recorded fixture')