diff --git a/scripts/mantis/build-telegram-desktop-proof-evidence.mjs b/scripts/mantis/build-telegram-desktop-proof-evidence.mjs
index 215856edea7..e7e9333c3af 100644
--- a/scripts/mantis/build-telegram-desktop-proof-evidence.mjs
+++ b/scripts/mantis/build-telegram-desktop-proof-evidence.mjs
@@ -121,7 +121,7 @@ function laneArtifactEntries() {
       lane,
       path: `${lane}/telegram-desktop-proof.gif`,
       targetPath: `${lane}/telegram-desktop-proof.gif`,
-      width: 520,
+      width: 420,
     },
     {
       kind: "motionClip",
diff --git a/test/scripts/mantis-build-telegram-desktop-proof-evidence.test.ts b/test/scripts/mantis-build-telegram-desktop-proof-evidence.test.ts
index 86b2546d3c1..6b221c15ded 100644
--- a/test/scripts/mantis-build-telegram-desktop-proof-evidence.test.ts
+++ b/test/scripts/mantis-build-telegram-desktop-proof-evidence.test.ts
@@ -97,5 +97,6 @@ describe("scripts/mantis/build-telegram-desktop-proof-evidence", () => {
     expect(body).toContain("| Main | This PR |");
     expect(body).toContain("baseline/telegram-desktop-proof.gif");
     expect(body).toContain("candidate/telegram-desktop-proof.gif");
+    expect(body).toContain('telegram-desktop-proof.gif" width="420"');
   });
 });