diff --git a/packages/playwright-core/src/server/bidi/bidiInput.ts b/packages/playwright-core/src/server/bidi/bidiInput.ts
index a7f8810da5..e40b13bb2e 100644
--- a/packages/playwright-core/src/server/bidi/bidiInput.ts
+++ b/packages/playwright-core/src/server/bidi/bidiInput.ts
@@ -95,8 +95,8 @@ export class RawMouseImpl implements input.RawMouse {
 
   async wheel(x: number, y: number, buttons: Set<types.MouseButton>, modifiers: Set<types.KeyboardModifier>, deltaX: number, deltaY: number): Promise<void> {
     // Bidi throws when x/y are not integers.
-    x = Math.round(x);
-    y = Math.round(y);
+    x = Math.floor(x);
+    y = Math.floor(y);
     await this._session.send('input.performActions', {
       context: this._session.sessionId,
       actions: [