diff --git a/src/plugins/discover/public/components/discover_grid_flyout/discover_grid_flyout.test.tsx b/src/plugins/discover/public/components/discover_grid_flyout/discover_grid_flyout.test.tsx
index 6097543c8aeb1..668f4090b3bdd 100644
--- a/src/plugins/discover/public/components/discover_grid_flyout/discover_grid_flyout.test.tsx
+++ b/src/plugins/discover/public/components/discover_grid_flyout/discover_grid_flyout.test.tsx
@@ -49,6 +49,7 @@ jest.mock('@elastic/eui', () => {
 
       return original.useIsWithinBreakpoints(breakpoints);
     }),
+    useResizeObserver: jest.fn(() => ({ width: 1000, height: 1000 })),
   };
 });