diff --git a/src/components/ColumnMenu/ColumnMenu.test.tsx b/src/components/ColumnMenu/ColumnMenu.test.tsx
index 48475040..f23c78c5 100644
--- a/src/components/ColumnMenu/ColumnMenu.test.tsx
+++ b/src/components/ColumnMenu/ColumnMenu.test.tsx
@@ -45,11 +45,9 @@ describe('ColumnMenu', () => {
       const { getByRole, getByText } = render(<ColumnMenu {...defaultProps} />)
 
       const menu = getByRole('menu')
-      expect(menu).toBeDefined()
       const ariaLabelledBy = menu.getAttribute('aria-labelledby')
-      expect(ariaLabelledBy).toBeDefined()
+      expect(ariaLabelledBy).toBeTruthy()
       const labelElement = getByText('Test Column')
-      expect(labelElement).toBeDefined()
       expect(labelElement.getAttribute('id')).toBe(ariaLabelledBy)
     })
 
@@ -75,7 +73,7 @@ describe('ColumnMenu', () => {
       const { container } = render(<ColumnMenu {...defaultProps} />)
 
       const overlay = container.querySelector('[role="presentation"]')
-      expect(overlay).toBeDefined()
+      expect(overlay).toBeTruthy()
     })
   })
 
@@ -86,7 +84,6 @@ describe('ColumnMenu', () => {
       )
 
       const sortButton = getByRole('menuitem')
-      expect(sortButton).toBeDefined()
       expect(sortButton.textContent).toBe('No sort')
     })
 
@@ -127,7 +124,6 @@ describe('ColumnMenu', () => {
         <ColumnMenu {...defaultProps} hideColumn={hideColumn} />
       )
       const hideOption = getByText('Hide column')
-      expect(hideOption).toBeDefined()
       hideOption.click()
       expect(hideColumn).toHaveBeenCalled()
     })
@@ -142,7 +138,6 @@ describe('ColumnMenu', () => {
         <ColumnMenu {...defaultProps} showAllColumns={showAllColumns} />
       )
       const showOption = getByText('Show all columns')
-      expect(showOption).toBeDefined()
       showOption.click()
       expect(showAllColumns).toHaveBeenCalled()
     })
@@ -160,8 +155,8 @@ describe('ColumnMenu', () => {
           showAllColumns={showAllColumns}
         />
       )
-      expect(getByText('Hide column')).toBeDefined()
-      expect(getByText('Show all columns')).toBeDefined()
+      getByText('Hide column')
+      getByText('Show all columns')
     })
   })
 
@@ -247,7 +242,6 @@ describe('ColumnMenu', () => {
         await user.keyboard('{ArrowUp}')
 
         // Navigation should be handled (no specific assertion as useFocusManagement is mocked)
-        expect(menu).toBeDefined()
       })
 
       it('handles ArrowDown key', async () => {
@@ -258,8 +252,6 @@ describe('ColumnMenu', () => {
         const menu = getByRole('menu')
         menu.focus()
         await user.keyboard('{ArrowDown}')
-
-        expect(menu).toBeDefined()
       })
 
       it('handles ArrowLeft key', async () => {
@@ -270,8 +262,6 @@ describe('ColumnMenu', () => {
         const menu = getByRole('menu')
         menu.focus()
         await user.keyboard('{ArrowLeft}')
-
-        expect(menu).toBeDefined()
       })
 
       it('handles ArrowRight key', async () => {
@@ -282,8 +272,6 @@ describe('ColumnMenu', () => {
         const menu = getByRole('menu')
         menu.focus()
         await user.keyboard('{ArrowRight}')
-
-        expect(menu).toBeDefined()
       })
     })
 
@@ -297,8 +285,6 @@ describe('ColumnMenu', () => {
         const menu = getByRole('menu')
         menu.focus()
         await user.keyboard('{Tab}')
-
-        expect(menu).toBeDefined()
       })
 
       it('handles Shift+Tab key', async () => {
@@ -309,8 +295,6 @@ describe('ColumnMenu', () => {
         const menu = getByRole('menu')
         menu.focus()
         await user.keyboard('{Shift>}{Tab}{/Shift}')
-
-        expect(menu).toBeDefined()
       })
     })
 
@@ -324,7 +308,6 @@ describe('ColumnMenu', () => {
         menu.focus()
         await user.keyboard('{Home}')
         // Navigation should be handled (no specific assertion as useFocusManagement is mocked)
-        expect(menu).toBeDefined()
       })
       it('handles End key', async () => {
         const { user, getByRole } = render(
@@ -334,7 +317,6 @@ describe('ColumnMenu', () => {
         menu.focus()
         await user.keyboard('{End}')
         // Navigation should be handled (no specific assertion as useFocusManagement is mocked)
-        expect(menu).toBeDefined()
       })
     })
 
@@ -355,8 +337,6 @@ describe('ColumnMenu', () => {
       await user.keyboard('{ArrowLeft}')
       await user.keyboard('{ArrowRight}')
       await user.keyboard('{Tab}')
-
-      expect(menu).toBeDefined()
     })
 
     it('handles unknown keys with default prevention', async () => {
@@ -365,8 +345,6 @@ describe('ColumnMenu', () => {
       const menu = getByRole('menu')
       menu.focus()
       await user.keyboard('a')
-
-      expect(menu).toBeDefined()
     })
   })
 
@@ -375,7 +353,7 @@ describe('ColumnMenu', () => {
       const { user, container } = render(<ColumnMenu {...defaultProps} />)
 
       const overlay = container.querySelector('[role="presentation"]')
-      expect(overlay).toBeDefined()
+      expect(overlay).toBeTruthy()
 
       if (overlay) {
         await user.click(overlay)
@@ -389,7 +367,6 @@ describe('ColumnMenu', () => {
       const { getByRole } = render(<ColumnMenu {...defaultProps} />)
 
       const menu = getByRole('menu')
-      expect(menu).toBeDefined()
 
       // Menu should not be a direct child of the render container
       // since it's rendered in a portal
@@ -403,8 +380,7 @@ describe('ColumnMenu', () => {
         <ColumnMenu {...defaultProps} sortable={true} />
       )
 
-      const menu = getByRole('menu')
-      expect(menu).toBeDefined()
+      getByRole('menu')
     })
 
     it('handles empty column name', () => {
@@ -419,7 +395,7 @@ describe('ColumnMenu', () => {
       }
 
       const labelElement = menu.querySelector('[role=presentation]')
-      expect(labelElement).toBeDefined()
+      expect(labelElement).toBeTruthy()
       expect(labelElement?.textContent).toBe('')
       expect(labelElement?.getAttribute('id')).toBe(id)
     })
@@ -430,7 +406,7 @@ describe('ColumnMenu', () => {
         <ColumnMenu {...defaultProps} columnName={specialName} />
       )
 
-      expect(getByText(specialName)).toBeDefined()
+      getByText(specialName)
     })
   })
 })
diff --git a/src/components/ColumnMenuButton/ColumnMenuButton.test.tsx b/src/components/ColumnMenuButton/ColumnMenuButton.test.tsx
index ef25f187..550bdb95 100644
--- a/src/components/ColumnMenuButton/ColumnMenuButton.test.tsx
+++ b/src/components/ColumnMenuButton/ColumnMenuButton.test.tsx
@@ -17,7 +17,6 @@ describe('ColumnMenuButton', () => {
       const { getByRole } = render(<ColumnMenuButton {...defaultProps} />)
       const button = getByRole('button')
 
-      expect(button).toBeDefined()
       expect(button.getAttribute('aria-label')).toBe('Column menu')
       expect(button.getAttribute('aria-haspopup')).toBe('menu')
       expect(button.getAttribute('aria-expanded')).toBe('false')
@@ -61,7 +60,7 @@ describe('ColumnMenuButton', () => {
       const { getByTestId } = render(
         <ColumnMenuButton {...defaultProps} icon={customIcon} />
       )
-      expect(getByTestId('custom-icon')).toBeDefined()
+      getByTestId('custom-icon')
     })
 
     it('renders with default icon when no icon provided', () => {
@@ -200,7 +199,6 @@ describe('ColumnMenuButton', () => {
       await user.keyboard('{Enter}')
 
       // Should not throw errors
-      expect(button).toBeDefined()
     })
 
     it('works without onEscape handler', async () => {
@@ -213,7 +211,6 @@ describe('ColumnMenuButton', () => {
       await user.keyboard('{Escape}')
 
       // Should not throw errors
-      expect(button).toBeDefined()
     })
 
     it('works without any handlers', async () => {
@@ -226,7 +223,6 @@ describe('ColumnMenuButton', () => {
       await user.keyboard('{Escape}')
 
       // Should not throw errors
-      expect(button).toBeDefined()
     })
   })
 })
diff --git a/src/components/HighTable/HighTable.test.tsx b/src/components/HighTable/HighTable.test.tsx
index 8765e91f..8ccc39b5 100644
--- a/src/components/HighTable/HighTable.test.tsx
+++ b/src/components/HighTable/HighTable.test.tsx
@@ -100,7 +100,7 @@ describe('HighTable', () => {
   it('renders initial rows', async () => {
     const { getByText } = render(<HighTable data={mockData} />)
     await waitFor(() => {
-      expect(getByText('ID')).toBeDefined()
+      getByText('ID')
       expect(mockData.getCell).toHaveBeenCalledWith({ row: 0, column: 'ID', orderBy: [] })
       expect(mockData.getCell).toHaveBeenCalledWith({ row: 23, column: 'Age', orderBy: [] })
       expect(mockData.getCell).not.toHaveBeenCalledWith({ row: 24, column: 'Age', orderBy: [] })
@@ -110,7 +110,7 @@ describe('HighTable', () => {
   it('uses overscan option', async () => {
     const { getByText } = render(<HighTable data={mockData} overscan={10} />)
     await waitFor(() => {
-      expect(getByText('ID')).toBeDefined()
+      getByText('ID')
       expect(mockData.getCell).toHaveBeenCalledWith({ row: 13, column: 'Age', orderBy: [] })
       expect(mockData.getCell).not.toHaveBeenCalledWith({ row: 14, column: 'Age', orderBy: [] })
     })
@@ -264,7 +264,7 @@ describe('with async data, HighTable', () => {
     const asyncData = createAsyncDataFrame()
     const { getByText } = render(<HighTable data={asyncData} />)
     await waitFor(() => {
-      expect(getByText('ID')).toBeDefined()
+      getByText('ID')
       expect(asyncData.fetch).toHaveBeenCalledExactlyOnceWith({ rowStart: 0, rowEnd, columns: ['ID', 'Name', 'Age'], orderBy: [], signal: expect.any(AbortSignal) })
       expect(asyncData.getCell).toHaveBeenCalledWith({ row: 0, column: 'ID', orderBy: [] })
       expect(asyncData.getCell).toHaveBeenCalledWith({ row: rowEnd - 1, column: 'Age', orderBy: [] })
@@ -278,7 +278,7 @@ describe('with async data, HighTable', () => {
     const asyncData = createAsyncDataFrame()
     const { getByText } = render(<HighTable data={asyncData} overscan={overscan} />)
     await waitFor(() => {
-      expect(getByText('ID')).toBeDefined()
+      getByText('ID')
       expect(asyncData.fetch).toHaveBeenCalledExactlyOnceWith({ rowStart: 0, rowEnd, columns: ['ID', 'Name', 'Age'], orderBy: [], signal: expect.any(AbortSignal) })
       expect(asyncData.getCell).toHaveBeenCalledWith({ row: rowEnd - 1, column: 'Age', orderBy: [] })
       expect(asyncData.getCell).not.toHaveBeenCalledWith({ row: rowEnd, column: 'Age', orderBy: [] })
@@ -291,7 +291,7 @@ describe('with async data, HighTable', () => {
     // initially, the cell is not there because the data is not fetched yet
     expect(queryByRole('cell', { name: 'async 0' })).toBeNull()
     // after some delay, the cell should be there
-    await expect(findByRole('cell', { name: 'async 0' })).resolves.toBeDefined()
+    await findByRole('cell', { name: 'async 0' })
   })
 
   it('handles scroll to load more rows', async () => {
@@ -302,7 +302,7 @@ describe('with async data, HighTable', () => {
       expect(asyncData.getCell).toHaveBeenCalledWith({ row: 23, column: 'Age', orderBy: [] })
       expect(asyncData.getCell).not.toHaveBeenCalledWith({ row: 24, column: 'Age', orderBy: [] })
     })
-    await expect(findByRole('cell', { name: 'async 0' })).resolves.toBeDefined()
+    await findByRole('cell', { name: 'async 0' })
     expect(queryByRole('cell', { name: 'async 24' })).toBeNull()
 
     act(() => {
@@ -314,7 +314,7 @@ describe('with async data, HighTable', () => {
     await waitFor(() => {
       expect(asyncData.getCell).toHaveBeenCalledWith({ row: 24, column: 'Age', orderBy: [] })
     })
-    await expect(findByRole('cell', { name: 'async 24' })).resolves.toBeDefined()
+    await findByRole('cell', { name: 'async 24' })
     expect(queryByRole('cell', { name: 'async 50' })).toBeNull()
 
     act(() => {
@@ -325,7 +325,7 @@ describe('with async data, HighTable', () => {
     await waitFor(() => {
       expect(asyncData.getCell).toHaveBeenCalledWith({ row: 50, column: 'Age', orderBy: [] })
     })
-    await expect(findByRole('cell', { name: 'async 50' })).resolves.toBeDefined()
+    await findByRole('cell', { name: 'async 50' })
 
     expect(asyncData._forTests.signalAborted).toHaveLength(0) // the fetches are too fast to be cancelled (10ms)
   })
@@ -408,13 +408,11 @@ describe('When sorted, HighTable', () => {
   })
 
   function checkRowContents(row: HTMLElement | undefined, rowNumber: string, ID: string, Count: string) {
-    expect(row).toBeDefined()
     if (!row) {
       throw new Error('Row is undefined')
     }
 
     const selectionCell = within(row).getByRole('rowheader')
-    expect(selectionCell).toBeDefined()
     expect(selectionCell.textContent).toBe(rowNumber)
 
     const columns = within(row).getAllByRole('cell')
@@ -426,7 +424,7 @@ describe('When sorted, HighTable', () => {
   it('shows the rows in the right order', async () => {
     const { user, findByRole, getByRole, findAllByRole } = render(<HighTable data={sortableDataFrame(data)} />)
 
-    expect(getByRole('columnheader', { name: 'ID' })).toBeDefined()
+    getByRole('columnheader', { name: 'ID' })
     await findByRole('cell', { name: 'row 0' })
 
     const table = getByRole('grid') // not table! because the table is interactive. See https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/Roles/grid_role
@@ -1170,8 +1168,8 @@ describe('Navigating Hightable with the keyboard', () => {
     const focusedElement = document.activeElement
     const rowIndex = focusedElement?.getAttribute('aria-rowindex')
     const colIndex = focusedElement?.getAttribute('aria-colindex')
-    expect(rowIndex).toBeDefined()
-    expect(colIndex).toBeDefined()
+    expect(rowIndex).toBeTruthy()
+    expect(colIndex).toBeTruthy()
     return { rowIndex: Number(rowIndex), colIndex: Number(colIndex) }
   }
 
@@ -1427,8 +1425,6 @@ describe('When the table scroller is focused', () => {
 //         <HighTable data={smallData} />
 //       </ErrorBoundary>
 //     )
-
-//     expect(getByRole('alert'), 'Something went wrong').toBeDefined()
 //   })
 // })
 
diff --git a/src/components/TableHeader/TableHeader.test.tsx b/src/components/TableHeader/TableHeader.test.tsx
index c25d43df..2b592bc9 100644
--- a/src/components/TableHeader/TableHeader.test.tsx
+++ b/src/components/TableHeader/TableHeader.test.tsx
@@ -38,7 +38,7 @@ describe('TableHeader', () => {
       />
     </tr></thead></table>)
     columnsParameters.forEach(descriptor => {
-      expect(getByText(descriptor.name)).toBeDefined()
+      getByText(descriptor.name)
     })
   })
 
@@ -146,7 +146,7 @@ describe('TableHeader', () => {
 
       // Test integration: menu is properly labeled by column name
       const labelId = menu.getAttribute('aria-labelledby')
-      expect(labelId).toBeDefined()
+      expect(labelId).toBeTruthy()
       if (!labelId) throw new Error('labelId should be defined')
       const label = document.getElementById(labelId)
       if (!label) throw new Error('label element should exist')
@@ -177,10 +177,9 @@ describe('TableHeader', () => {
       })
 
       await user.click(menuButton)
-      const menu = getByRole('menu')
+      getByRole('menu')
 
       // Test integration: menu opens within table and can be closed
-      expect(menu).toBeDefined()
       await user.click(menuButton)
       expect(queryByRole('menu')).toBeNull()
     })