diff --git a/x-pack/plugins/observability_solution/uptime/public/legacy_uptime/components/synthetics/check_steps/steps_list.test.tsx b/x-pack/plugins/observability_solution/uptime/public/legacy_uptime/components/synthetics/check_steps/steps_list.test.tsx
index 00b40415adefbcc..82c5bbf472eceb9 100644
--- a/x-pack/plugins/observability_solution/uptime/public/legacy_uptime/components/synthetics/check_steps/steps_list.test.tsx
+++ b/x-pack/plugins/observability_solution/uptime/public/legacy_uptime/components/synthetics/check_steps/steps_list.test.tsx
@@ -8,7 +8,7 @@
 import React from 'react';
 import { JourneyStep } from '../../../../../common/runtime_types/ping';
 import { StepsList } from './steps_list';
-import { render, forDesktopOnly, forMobileOnly } from '../../../lib/helper/rtl_helpers';
+import { render } from '../../../lib/helper/rtl_helpers';
 import { VIEW_PERFORMANCE } from '../../monitor/synthetics/translations';
 
 describe('StepList component', () => {
@@ -83,7 +83,7 @@ describe('StepList component', () => {
       <StepsList data={[steps[0]]} loading={false} allStepsLoaded={true} />
     );
     expect(getByTestId('step-detail-link')).toHaveAttribute('href', '/journey/fake-group/step/1');
-    expect(forDesktopOnly(getByTitle, 'title')(`Failed`));
+    expect(getByTitle(`Failed`)).toBeInTheDocument();
   });
 
   it.each([
@@ -94,7 +94,7 @@ describe('StepList component', () => {
     const step = steps[0];
     step.synthetics!.payload!.status = status;
     const { getByText } = render(<StepsList data={[step]} loading={false} allStepsLoaded={true} />);
-    expect(forDesktopOnly(getByText)(expectedStatus));
+    expect(getByText(expectedStatus)).toBeInTheDocument();
   });
 
   it('creates expected message for all succeeded', () => {
@@ -156,24 +156,27 @@ describe('StepList component', () => {
   });
 
   describe('Mobile Designs', () => {
-    // We don't need to resize the window here because EUI
-    // does all the manipulation of what is displayed through
-    // CSS. Therefore, it's enough to check what's actually
-    // rendered and its classes.
+    const jestWindowWidth = window.innerWidth;
+    beforeAll(() => {
+      window.innerWidth = 600;
+    });
+    afterAll(() => {
+      window.innerWidth = jestWindowWidth;
+    });
 
     it('renders the step name and index', () => {
       const { getByText } = render(
         <StepsList data={steps} loading={false} allStepsLoaded={true} />
       );
-      expect(forMobileOnly(getByText)('1. load page')).toBeInTheDocument();
-      expect(forMobileOnly(getByText)('2. go to login')).toBeInTheDocument();
+      expect(getByText('1. load page')).toBeInTheDocument();
+      expect(getByText('2. go to login')).toBeInTheDocument();
     });
 
     it('does not render the link to view step details', async () => {
       const { queryByText } = render(
         <StepsList data={steps} loading={false} allStepsLoaded={true} />
       );
-      expect(forMobileOnly(queryByText)(VIEW_PERFORMANCE)).not.toBeInTheDocument();
+      expect(queryByText(VIEW_PERFORMANCE)).not.toBeInTheDocument();
     });
 
     it('renders the status label', () => {
@@ -183,8 +186,8 @@ describe('StepList component', () => {
       const { getByText } = render(
         <StepsList data={steps} loading={false} allStepsLoaded={true} />
       );
-      expect(forMobileOnly(getByText)('Succeeded')).toBeInTheDocument();
-      expect(forMobileOnly(getByText)('Skipped')).toBeInTheDocument();
+      expect(getByText('Succeeded')).toBeInTheDocument();
+      expect(getByText('Skipped')).toBeInTheDocument();
     });
   });
 });
diff --git a/x-pack/plugins/observability_solution/uptime/public/legacy_uptime/lib/helper/rtl_helpers.tsx b/x-pack/plugins/observability_solution/uptime/public/legacy_uptime/lib/helper/rtl_helpers.tsx
index 0b23c089385d7c1..9ca652edb9cc48c 100644
--- a/x-pack/plugins/observability_solution/uptime/public/legacy_uptime/lib/helper/rtl_helpers.tsx
+++ b/x-pack/plugins/observability_solution/uptime/public/legacy_uptime/lib/helper/rtl_helpers.tsx
@@ -356,38 +356,3 @@ export const makeUptimePermissionsCore = (
     },
   };
 };
-
-// This function filters out the queried elements which appear only
-// either on mobile or desktop.
-//
-// It does so by filtering those with the class passed as the `classWrapper`.
-// For mobile, we filter classes which tell elements to be hidden on desktop.
-// For desktop, we do the opposite.
-//
-// We have this function because EUI will manipulate the visibility of some
-// elements through pure CSS, which we can't assert on tests. Therefore,
-// we look for the corresponding class wrapper.
-const finderWithClassWrapper =
-  (classWrapper: string) =>
-  (
-    getterFn: (f: MatcherFunction) => HTMLElement | null,
-    customAttribute?: keyof Element | keyof HTMLElement
-  ) =>
-  (text: string): HTMLElement | null =>
-    getterFn((_content: string, node: Element | null) => {
-      if (!node) return false;
-      // There are actually properties that are not in Element but which
-      // appear on the `node`, so we must cast the customAttribute as a keyof Element
-      const content = node[(customAttribute as keyof Element) ?? 'innerHTML'];
-      if (content === text && wrappedInClass(node, classWrapper)) return true;
-      return false;
-    });
-
-const wrappedInClass = (element: HTMLElement | Element, classWrapper: string): boolean => {
-  if (element.className.includes(classWrapper)) return true;
-  if (element.parentElement) return wrappedInClass(element.parentElement, classWrapper);
-  return false;
-};
-
-export const forMobileOnly = finderWithClassWrapper('hideForDesktop');
-export const forDesktopOnly = finderWithClassWrapper('hideForMobile');
diff --git a/x-pack/plugins/security_solution/public/common/components/event_details/event_fields_browser.test.tsx b/x-pack/plugins/security_solution/public/common/components/event_details/event_fields_browser.test.tsx
index cfe1def2b9da2e9..570029e1c3c0ba6 100644
--- a/x-pack/plugins/security_solution/public/common/components/event_details/event_fields_browser.test.tsx
+++ b/x-pack/plugins/security_solution/public/common/components/event_details/event_fields_browser.test.tsx
@@ -17,14 +17,6 @@ import { TimelineTabs } from '../../../../common/types/timeline';
 
 jest.mock('../../lib/kibana');
 
-jest.mock('@elastic/eui', () => {
-  const original = jest.requireActual('@elastic/eui');
-  return {
-    ...original,
-    EuiScreenReaderOnly: () => <></>,
-  };
-});
-
 jest.mock('../../hooks/use_get_field_spec');
 
 jest.mock('@kbn/cell-actions/src/hooks/use_load_actions', () => {