diff --git a/packages/tests/fixtures/avatar-resized-120x120.webp b/packages/tests/fixtures/avatar-resized-120x120.webp
new file mode 100644
index 000000000..216d7e1a4
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diff --git a/packages/tests/fixtures/avatar-resized-1500x1500.webp b/packages/tests/fixtures/avatar-resized-1500x1500.webp
new file mode 100644
index 000000000..0fe2ed08a
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diff --git a/packages/tests/fixtures/avatar-resized-48x48.webp b/packages/tests/fixtures/avatar-resized-48x48.webp
new file mode 100644
index 000000000..803df797f
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diff --git a/packages/tests/fixtures/avatar-resized-600x600.webp b/packages/tests/fixtures/avatar-resized-600x600.webp
new file mode 100644
index 000000000..a286b7a89
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diff --git a/packages/tests/fixtures/avatar.webp b/packages/tests/fixtures/avatar.webp
new file mode 100644
index 000000000..92546cda4
Binary files /dev/null and b/packages/tests/fixtures/avatar.webp differ
diff --git a/packages/tests/src/api/users/users.ts b/packages/tests/src/api/users/users.ts
index af4f19340..222493a38 100644
--- a/packages/tests/src/api/users/users.ts
+++ b/packages/tests/src/api/users/users.ts
@@ -272,8 +272,8 @@ describe('Test users', function () {
       }
     })
 
-    it('Should be able to update my avatar with a gif, and then a png', async function () {
-      for (const extension of [ '.png', '.gif' ]) {
+    it('Should be able to update my avatar with a gif, a webp and a png', async function () {
+      for (const extension of [ '.png', '.gif', '.webp' ]) {
         const fixture = 'avatar' + extension
 
         await server.users.updateMyAvatar({ token: userToken, fixture })
diff --git a/packages/tests/src/shared/checks.ts b/packages/tests/src/shared/checks.ts
index 1c3bff2a5..0981f2ce4 100644
--- a/packages/tests/src/shared/checks.ts
+++ b/packages/tests/src/shared/checks.ts
@@ -62,12 +62,13 @@ async function testAvatarSize (options: {
   // We don't test big GIF avatars
   if (extension === '.gif' && avatar.width > 150) return
 
-  const data = await readFile(buildAbsoluteFixturePath(imageName + extension))
+  const fixturePath = buildAbsoluteFixturePath(imageName + extension)
+  const data = await readFile(fixturePath)
   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')
+  expect(body.length).to.be.above(minLength, 'the generated image is way smaller than the recorded fixture ' + fixturePath)
+  expect(body.length).to.be.below(maxLength, 'the generated image is way larger than the recorded fixture ' + fixturePath)
 }
 
 async function testImageGeneratedByFFmpeg (url: string, imageName: string, imageHTTPPath: string, extension = '.jpg') {