diff --git a/packages/core-app-api/src/apis/system/ApiProvider.test.tsx b/packages/core-app-api/src/apis/system/ApiProvider.test.tsx
index 6460e12900..ceb3a0d12a 100644
--- a/packages/core-app-api/src/apis/system/ApiProvider.test.tsx
+++ b/packages/core-app-api/src/apis/system/ApiProvider.test.tsx
@@ -55,7 +55,7 @@ describe('ApiProvider', () => {
         <MyHocConsumer />
       </ApiProvider>,
     );
-    renderedHoc.getByText('hoc message: hello');
+    expect(renderedHoc.getByText('hoc message: hello')).toBeInTheDocument();
   });
 
   it('should provide nested access to apis', () => {
@@ -84,7 +84,7 @@ describe('ApiProvider', () => {
         </ApiProvider>
       </ApiProvider>,
     );
-    renderedHook.getByText('a=z b=y');
+    expect(renderedHook.getByText('a=z b=y')).toBeInTheDocument();
   });
 
   it('should ignore deps in prototype', () => {
@@ -107,7 +107,7 @@ describe('ApiProvider', () => {
         <MyWeirdHocConsumer />
       </ApiProvider>,
     );
-    renderedHoc.getByText('hoc message: hello');
+    expect(renderedHoc.getByText('hoc message: hello')).toBeInTheDocument();
   });
 
   it('should error if no provider is available', () => {
@@ -229,6 +229,6 @@ describe('v1 consumer', () => {
         <MyHookConsumerV1 />
       </ApiProvider>,
     );
-    renderedHook.getByText('hook message: hello');
+    expect(renderedHook.getByText('hook message: hello')).toBeInTheDocument();
   });
 });
diff --git a/packages/core-components/src/components/CodeSnippet/CodeSnippet.test.tsx b/packages/core-components/src/components/CodeSnippet/CodeSnippet.test.tsx
index fec5b7ddf7..c0096e7ae9 100644
--- a/packages/core-components/src/components/CodeSnippet/CodeSnippet.test.tsx
+++ b/packages/core-components/src/components/CodeSnippet/CodeSnippet.test.tsx
@@ -34,8 +34,12 @@ describe('<CodeSnippet />', () => {
   // react-syntax-highlighter is large and can cause significant slowdowns
   // This test makes sure we're loading things in asynchronously and not too broadly.
   it('renders quickly', async () => {
+    const start = new Date();
     await renderInTestApp(<CodeSnippet text="" language="javascript" />);
-  }, 1000);
+    const end = new Date();
+
+    expect(end.getTime() - start.getTime()).toBeLessThanOrEqual(1000);
+  }, 1500);
 
   it('renders text without exploding', async () => {
     const { getByText } = await renderInTestApp(<CodeSnippet {...minProps} />);
diff --git a/packages/core-components/src/components/FeatureDiscovery/FeatureCalloutCircular.test.tsx b/packages/core-components/src/components/FeatureDiscovery/FeatureCalloutCircular.test.tsx
index f72e33ac4b..b5106e1bf9 100644
--- a/packages/core-components/src/components/FeatureDiscovery/FeatureCalloutCircular.test.tsx
+++ b/packages/core-components/src/components/FeatureDiscovery/FeatureCalloutCircular.test.tsx
@@ -58,8 +58,8 @@ describe('<FeatureCalloutCircular />', () => {
         description="description"
       />,
     );
-    rendered.getByText('description');
-    rendered.getByText('title');
+    expect(rendered.getByText('description')).toBeInTheDocument();
+    expect(rendered.getByText('title')).toBeInTheDocument();
   });
 
   it('renders with correct style', async () => {
diff --git a/packages/core-components/src/components/OverflowTooltip/OverflowTooltip.test.tsx b/packages/core-components/src/components/OverflowTooltip/OverflowTooltip.test.tsx
index 2fea7fa5e1..a65c758c28 100644
--- a/packages/core-components/src/components/OverflowTooltip/OverflowTooltip.test.tsx
+++ b/packages/core-components/src/components/OverflowTooltip/OverflowTooltip.test.tsx
@@ -20,10 +20,12 @@ import { OverflowTooltip } from './OverflowTooltip';
 
 describe('<OverflowTooltip />', () => {
   it('renders without exploding', async () => {
-    render(<OverflowTooltip text="Text that may overflow" />);
+    expect(
+      render(<OverflowTooltip text="Text that may overflow" />),
+    ).toBeTruthy();
   });
 
   it('renders without exploding when the text prop is missing', async () => {
-    render(<OverflowTooltip text={undefined} />);
+    expect(render(<OverflowTooltip text={undefined} />)).toBeTruthy();
   });
 });
diff --git a/packages/core-components/src/components/ProgressBars/Gauge.test.tsx b/packages/core-components/src/components/ProgressBars/Gauge.test.tsx
index 2d92391a30..0c19d5acb2 100644
--- a/packages/core-components/src/components/ProgressBars/Gauge.test.tsx
+++ b/packages/core-components/src/components/ProgressBars/Gauge.test.tsx
@@ -24,34 +24,34 @@ describe('<Gauge />', () => {
     const { getByText } = await renderInTestApp(
       <Gauge value={10} fractional={false} />,
     );
-    getByText('10%');
+    expect(getByText('10%')).toBeInTheDocument();
   });
   it('handles fractional prop', async () => {
     const { getByText } = await renderInTestApp(
       <Gauge value={0.1} fractional />,
     );
-    getByText('10%');
+    expect(getByText('10%')).toBeInTheDocument();
   });
 
   it('handles max prop', async () => {
     const { getByText } = await renderInTestApp(
       <Gauge value={1} max={10} fractional={false} />,
     );
-    getByText('1%');
+    expect(getByText('1%')).toBeInTheDocument();
   });
 
   it('handles unit prop', async () => {
     const { getByText } = await renderInTestApp(
       <Gauge value={10} fractional={false} unit="m" />,
     );
-    getByText('10m');
+    expect(getByText('10m')).toBeInTheDocument();
   });
 
   it('handle relativeToMax prop', async () => {
     const { getByText } = await renderInTestApp(
       <Gauge value={7} max={10} relativeToMax fractional={false} unit=" pts" />,
     );
-    getByText('7 pts');
+    expect(getByText('7 pts')).toBeInTheDocument();
   });
 
   it('handle decimalDigits prop', async () => {
@@ -65,7 +65,7 @@ describe('<Gauge />', () => {
         unit="/10"
       />,
     );
-    getByText('5.50/10');
+    expect(getByText('5.50/10')).toBeInTheDocument();
   });
 
   const ok = '#111';
diff --git a/packages/core-components/src/layout/ContentHeader/ContentHeader.test.tsx b/packages/core-components/src/layout/ContentHeader/ContentHeader.test.tsx
index 5ae2efb806..8be54b9114 100644
--- a/packages/core-components/src/layout/ContentHeader/ContentHeader.test.tsx
+++ b/packages/core-components/src/layout/ContentHeader/ContentHeader.test.tsx
@@ -17,6 +17,7 @@
 import React from 'react';
 import { ContentHeader } from './ContentHeader';
 import { renderInTestApp } from '@backstage/test-utils';
+import _ from 'lodash';
 
 jest.mock('react-helmet', () => {
   return {
@@ -27,14 +28,14 @@ jest.mock('react-helmet', () => {
 describe('<ContentHeader/>', () => {
   it('should render with title', async () => {
     const rendered = await renderInTestApp(<ContentHeader title="Title" />);
-    rendered.getByText('Title');
+    expect(rendered.getByText('Title')).toBeInTheDocument();
   });
 
   it('should render without title', async () => {
     const rendered = await renderInTestApp(
       <ContentHeader>content</ContentHeader>,
     );
-    rendered.getByText('content');
+    expect(rendered.getByText('content')).toBeInTheDocument();
   });
 
   it('should render with titleComponent', async () => {
@@ -43,13 +44,13 @@ describe('<ContentHeader/>', () => {
     const rendered = await renderInTestApp(
       <ContentHeader titleComponent={titleComponent} />,
     );
-    rendered.getByText(title);
+    expect(rendered.getByText(title)).toBeInTheDocument();
   });
 
   it('should render with description', async () => {
     const rendered = await renderInTestApp(
       <ContentHeader description="description" />,
     );
-    rendered.getByText('description');
+    expect(rendered.getByText('description')).toBeInTheDocument();
   });
 });
diff --git a/packages/core-components/src/layout/Header/Header.test.tsx b/packages/core-components/src/layout/Header/Header.test.tsx
index 776e39045c..2a63b4fedc 100644
--- a/packages/core-components/src/layout/Header/Header.test.tsx
+++ b/packages/core-components/src/layout/Header/Header.test.tsx
@@ -29,42 +29,46 @@ jest.mock('react-helmet', () => {
 describe('<Header/>', () => {
   it('should render with title', async () => {
     const rendered = await renderInTestApp(<Header title="Title" />);
-    rendered.getByText('Title');
+    expect(rendered.getByText('Title')).toBeInTheDocument();
   });
 
   it('should set document title', async () => {
     const rendered = await renderInTestApp(<Header title="Title1" />);
-    rendered.getByText('Title1');
-    rendered.getByText('defaultTitle: Title1 | Backstage');
+    expect(rendered.getByText('Title1')).toBeInTheDocument();
+    expect(
+      rendered.getByText('defaultTitle: Title1 | Backstage'),
+    ).toBeInTheDocument();
   });
 
   it('should override document title', async () => {
     const rendered = await renderInTestApp(
       <Header title="Title1" pageTitleOverride="Title2" />,
     );
-    rendered.getByText('Title1');
-    rendered.getByText('defaultTitle: Title2 | Backstage');
+    expect(rendered.getByText('Title1')).toBeInTheDocument();
+    expect(
+      rendered.getByText('defaultTitle: Title2 | Backstage'),
+    ).toBeInTheDocument();
   });
 
   it('should have subtitle', async () => {
     const rendered = await renderInTestApp(
       <Header title="Title" subtitle="Subtitle" />,
     );
-    rendered.getByText('Subtitle');
+    expect(rendered.getByText('Subtitle')).toBeInTheDocument();
   });
 
   it('should have type rendered', async () => {
     const rendered = await renderInTestApp(
       <Header title="Title" type="tool" />,
     );
-    rendered.getByText('tool');
+    expect(rendered.getByText('tool')).toBeInTheDocument();
   });
 
   it('should have breadcrumb rendered', async () => {
     const rendered = await renderInTestApp(
       <Header title="Title" type="tool" typeLink="/tool" />,
     );
-    rendered.getAllByText('Title');
+    expect(rendered.getAllByText('Title')).toBeTruthy();
   });
 
   it('should use app.title', async () => {
@@ -75,6 +79,6 @@ describe('<Header/>', () => {
         <Header title="Title" type="tool" typeLink="/tool" />,
       </TestApiProvider>,
     );
-    rendered.getAllByText(/Title | Blah/);
+    expect(rendered.getAllByText(/Title | Blah/)).toBeTruthy();
   });
 });
diff --git a/packages/core-components/src/layout/HeaderActionMenu/HeaderActionMenu.test.tsx b/packages/core-components/src/layout/HeaderActionMenu/HeaderActionMenu.test.tsx
index b56ae3167f..fc9b4f449c 100644
--- a/packages/core-components/src/layout/HeaderActionMenu/HeaderActionMenu.test.tsx
+++ b/packages/core-components/src/layout/HeaderActionMenu/HeaderActionMenu.test.tsx
@@ -22,7 +22,14 @@ import userEvent from '@testing-library/user-event';
 
 describe('<ComponentContextMenu />', () => {
   it('renders without any items and without exploding', async () => {
-    await renderInTestApp(<HeaderActionMenu actionItems={[]} />);
+    const rendered = await renderInTestApp(
+      <HeaderActionMenu actionItems={[]} />,
+    );
+
+    expect(rendered.queryByTestId('header-action-menu')).toBeInTheDocument();
+    expect(
+      rendered.queryByTestId('header-action-item'),
+    ).not.toBeInTheDocument();
   });
 
   it('can open the menu and click menu items', async () => {