diff --git a/packages/grid/x-data-grid-premium/src/tests/DataGridPremium.test.tsx b/packages/grid/x-data-grid-premium/src/tests/DataGridPremium.test.tsx
index 756e03503886..09521a4d2b07 100644
--- a/packages/grid/x-data-grid-premium/src/tests/DataGridPremium.test.tsx
+++ b/packages/grid/x-data-grid-premium/src/tests/DataGridPremium.test.tsx
@@ -12,7 +12,7 @@ import { getColumnValues } from 'test/utils/helperFn';
 
 const isJSDOM = /jsdom/.test(window.navigator.userAgent);
 
-describe('<DataGrid /> - Quick Filter', () => {
+describe('<DataGrid /> - Quick filter', () => {
   const { render } = createRenderer();
 
   const baselineProps = {
diff --git a/packages/grid/x-data-grid-premium/src/tests/aggregation.DataGridPremium.test.tsx b/packages/grid/x-data-grid-premium/src/tests/aggregation.DataGridPremium.test.tsx
index 3c64e8514fb3..8b4d4509078a 100644
--- a/packages/grid/x-data-grid-premium/src/tests/aggregation.DataGridPremium.test.tsx
+++ b/packages/grid/x-data-grid-premium/src/tests/aggregation.DataGridPremium.test.tsx
@@ -275,7 +275,7 @@ describe('<DataGridPremium /> - Aggregation', () => {
     });
   });
 
-  describe('Tree Data', () => {
+  describe('Tree data', () => {
     function TreeDataTest(props: Omit<DataGridPremiumProps, 'columns'>) {
       return (
         <Test
@@ -355,7 +355,7 @@ describe('<DataGridPremium /> - Aggregation', () => {
     });
   });
 
-  describe('Column Menu', () => {
+  describe('Column menu', () => {
     it('should render select on aggregable column', () => {
       render(<Test />);
 
diff --git a/packages/grid/x-data-grid-premium/src/tests/rowGrouping.DataGridPremium.test.tsx b/packages/grid/x-data-grid-premium/src/tests/rowGrouping.DataGridPremium.test.tsx
index 2a03b49efffe..74e7fce53bd9 100644
--- a/packages/grid/x-data-grid-premium/src/tests/rowGrouping.DataGridPremium.test.tsx
+++ b/packages/grid/x-data-grid-premium/src/tests/rowGrouping.DataGridPremium.test.tsx
@@ -69,7 +69,7 @@ const baselineProps: DataGridPremiumProps = {
   ],
 };
 
-describe('<DataGridPremium /> - Row Grouping', () => {
+describe('<DataGridPremium /> - Row grouping', () => {
   const { render, clock } = createRenderer();
 
   let apiRef: React.MutableRefObject<GridApi>;
diff --git a/packages/grid/x-data-grid-premium/src/tests/statePersistence.DataGridPremium.test.tsx b/packages/grid/x-data-grid-premium/src/tests/statePersistence.DataGridPremium.test.tsx
index 7567a7a2c35a..497722909eb6 100644
--- a/packages/grid/x-data-grid-premium/src/tests/statePersistence.DataGridPremium.test.tsx
+++ b/packages/grid/x-data-grid-premium/src/tests/statePersistence.DataGridPremium.test.tsx
@@ -47,7 +47,7 @@ const FULL_INITIAL_STATE: GridInitialState = {
   },
 };
 
-describe('<DataGridPremium /> - State Persistence', () => {
+describe('<DataGridPremium /> - State persistence', () => {
   const { render } = createRenderer();
 
   let apiRef: React.MutableRefObject<GridApi>;
diff --git a/packages/grid/x-data-grid-pro/src/tests/cellEditing.DataGridPro.test.tsx b/packages/grid/x-data-grid-pro/src/tests/cellEditing.DataGridPro.test.tsx
index 5336b9e2f83e..3edf22299bf8 100644
--- a/packages/grid/x-data-grid-pro/src/tests/cellEditing.DataGridPro.test.tsx
+++ b/packages/grid/x-data-grid-pro/src/tests/cellEditing.DataGridPro.test.tsx
@@ -16,7 +16,7 @@ import { getBasicGridData } from '@mui/x-data-grid-generator';
 import { createRenderer, fireEvent, act, userEvent } from '@mui/monorepo/test/utils';
 import { getCell, spyApi } from 'test/utils/helperFn';
 
-describe('<DataGridPro /> - Cell Editing', () => {
+describe('<DataGridPro /> - Cell editing', () => {
   const { render, clock } = createRenderer({ clock: 'fake' });
 
   let apiRef: React.MutableRefObject<GridApi>;
diff --git a/packages/grid/x-data-grid-pro/src/tests/columnHeaders.DataGridPro.test.tsx b/packages/grid/x-data-grid-pro/src/tests/columnHeaders.DataGridPro.test.tsx
index d40189b6e492..30b10d39465e 100644
--- a/packages/grid/x-data-grid-pro/src/tests/columnHeaders.DataGridPro.test.tsx
+++ b/packages/grid/x-data-grid-pro/src/tests/columnHeaders.DataGridPro.test.tsx
@@ -6,7 +6,7 @@ import { getColumnHeaderCell, getColumnValues } from 'test/utils/helperFn';
 
 const isJSDOM = /jsdom/.test(window.navigator.userAgent);
 
-describe('<DataGridPro /> - Column Headers', () => {
+describe('<DataGridPro /> - Column headers', () => {
   const { render, clock } = createRenderer({ clock: 'fake' });
 
   const baselineProps = {
diff --git a/packages/grid/x-data-grid-pro/src/tests/columnSpanning.DataGridPro.test.tsx b/packages/grid/x-data-grid-pro/src/tests/columnSpanning.DataGridPro.test.tsx
index e9454dca917f..ad4632ec1b07 100644
--- a/packages/grid/x-data-grid-pro/src/tests/columnSpanning.DataGridPro.test.tsx
+++ b/packages/grid/x-data-grid-pro/src/tests/columnSpanning.DataGridPro.test.tsx
@@ -6,7 +6,7 @@ import { getActiveCell, getCell, getColumnHeaderCell } from 'test/utils/helperFn
 
 const isJSDOM = /jsdom/.test(window.navigator.userAgent);
 
-describe('<DataGridPro /> - Column Spanning', () => {
+describe('<DataGridPro /> - Column spanning', () => {
   const { render } = createRenderer({ clock: 'fake' });
 
   const baselineProps = {
diff --git a/packages/grid/x-data-grid-pro/src/tests/columnsVisibility.DataGridPro.test.tsx b/packages/grid/x-data-grid-pro/src/tests/columnsVisibility.DataGridPro.test.tsx
index 824cdbe06c80..48c90c678a34 100644
--- a/packages/grid/x-data-grid-pro/src/tests/columnsVisibility.DataGridPro.test.tsx
+++ b/packages/grid/x-data-grid-pro/src/tests/columnsVisibility.DataGridPro.test.tsx
@@ -21,7 +21,7 @@ const rows: GridRowsProp = [{ id: 1 }];
 
 const columns: GridColDef[] = [{ field: 'id' }, { field: 'idBis' }];
 
-describe('<DataGridPro /> - Columns Visibility', () => {
+describe('<DataGridPro /> - Columns visibility', () => {
   const { render } = createRenderer({ clock: 'fake' });
 
   let apiRef: React.MutableRefObject<GridApi>;
diff --git a/packages/grid/x-data-grid-pro/src/tests/editComponents.DataGridPro.test.tsx b/packages/grid/x-data-grid-pro/src/tests/editComponents.DataGridPro.test.tsx
index 62b77df7e944..f2cac621b16e 100644
--- a/packages/grid/x-data-grid-pro/src/tests/editComponents.DataGridPro.test.tsx
+++ b/packages/grid/x-data-grid-pro/src/tests/editComponents.DataGridPro.test.tsx
@@ -37,7 +37,7 @@ const generateDate = (
   return rawDate.getTime();
 };
 
-describe('<DataGridPro /> - Edit Components', () => {
+describe('<DataGridPro /> - Edit components', () => {
   const { render, clock } = createRenderer({ clock: 'fake' });
 
   let apiRef: React.MutableRefObject<GridApi>;
diff --git a/packages/grid/x-data-grid-pro/src/tests/events.DataGridPro.test.tsx b/packages/grid/x-data-grid-pro/src/tests/events.DataGridPro.test.tsx
index 9190215e67b5..83e4b6ae985d 100644
--- a/packages/grid/x-data-grid-pro/src/tests/events.DataGridPro.test.tsx
+++ b/packages/grid/x-data-grid-pro/src/tests/events.DataGridPro.test.tsx
@@ -20,7 +20,7 @@ import { spy } from 'sinon';
 
 const isJSDOM = /jsdom/.test(window.navigator.userAgent);
 
-describe('<DataGridPro /> - Events Params', () => {
+describe('<DataGridPro /> - Events params', () => {
   const { render, clock } = createRenderer();
 
   const baselineProps: { rows: GridRowsProp; columns: GridColDef[] } = {
diff --git a/packages/grid/x-data-grid-pro/src/tests/rowEditing.DataGridPro.test.tsx b/packages/grid/x-data-grid-pro/src/tests/rowEditing.DataGridPro.test.tsx
index dbd563bbc9f6..7e8a2b7f28d0 100644
--- a/packages/grid/x-data-grid-pro/src/tests/rowEditing.DataGridPro.test.tsx
+++ b/packages/grid/x-data-grid-pro/src/tests/rowEditing.DataGridPro.test.tsx
@@ -16,7 +16,7 @@ import { getBasicGridData } from '@mui/x-data-grid-generator';
 import { createRenderer, fireEvent, act, userEvent, screen } from '@mui/monorepo/test/utils';
 import { getCell, getRow, spyApi } from 'test/utils/helperFn';
 
-describe('<DataGridPro /> - Row Editing', () => {
+describe('<DataGridPro /> - Row editing', () => {
   const { render, clock } = createRenderer();
 
   let apiRef: React.MutableRefObject<GridApi>;
diff --git a/packages/grid/x-data-grid-pro/src/tests/rowSelection.DataGridPro.test.tsx b/packages/grid/x-data-grid-pro/src/tests/rowSelection.DataGridPro.test.tsx
index 0defbac668e3..ed04365c0cf8 100644
--- a/packages/grid/x-data-grid-pro/src/tests/rowSelection.DataGridPro.test.tsx
+++ b/packages/grid/x-data-grid-pro/src/tests/rowSelection.DataGridPro.test.tsx
@@ -23,7 +23,7 @@ function getSelectedRowIds() {
     );
 }
 
-describe('<DataGridPro /> - Row Selection', () => {
+describe('<DataGridPro /> - Row selection', () => {
   const { render } = createRenderer();
 
   let apiRef: React.MutableRefObject<GridApi>;
diff --git a/packages/grid/x-data-grid-pro/src/tests/statePersistence.DataGridPro.test.tsx b/packages/grid/x-data-grid-pro/src/tests/statePersistence.DataGridPro.test.tsx
index a039498fff72..737a83f810b5 100644
--- a/packages/grid/x-data-grid-pro/src/tests/statePersistence.DataGridPro.test.tsx
+++ b/packages/grid/x-data-grid-pro/src/tests/statePersistence.DataGridPro.test.tsx
@@ -79,7 +79,7 @@ const FULL_INITIAL_STATE: GridInitialState = {
   },
 };
 
-describe('<DataGridPro /> - State Persistence', () => {
+describe('<DataGridPro /> - State persistence', () => {
   const { render, clock } = createRenderer({ clock: 'fake' });
 
   let apiRef: React.MutableRefObject<GridApi>;
diff --git a/packages/grid/x-data-grid-pro/src/tests/treeData.DataGridPro.test.tsx b/packages/grid/x-data-grid-pro/src/tests/treeData.DataGridPro.test.tsx
index f83c86ef62d7..8b206fc60229 100644
--- a/packages/grid/x-data-grid-pro/src/tests/treeData.DataGridPro.test.tsx
+++ b/packages/grid/x-data-grid-pro/src/tests/treeData.DataGridPro.test.tsx
@@ -56,7 +56,7 @@ const baselineProps: DataGridProProps = {
   getRowId: (row) => row.name,
 };
 
-describe('<DataGridPro /> - Tree Data', () => {
+describe('<DataGridPro /> - Tree data', () => {
   const { render, clock } = createRenderer({ clock: 'fake' });
 
   let apiRef: React.MutableRefObject<GridApi>;
diff --git a/packages/grid/x-data-grid/src/tests/columnHeaders.DataGrid.test.tsx b/packages/grid/x-data-grid/src/tests/columnHeaders.DataGrid.test.tsx
index ac6f38480252..c8e01b7bd041 100644
--- a/packages/grid/x-data-grid/src/tests/columnHeaders.DataGrid.test.tsx
+++ b/packages/grid/x-data-grid/src/tests/columnHeaders.DataGrid.test.tsx
@@ -6,7 +6,7 @@ import { getColumnHeaderCell, getColumnHeadersTextContent } from 'test/utils/hel
 
 const isJSDOM = /jsdom/.test(window.navigator.userAgent);
 
-describe('<DataGrid /> - Column Headers', () => {
+describe('<DataGrid /> - Column headers', () => {
   const { render, clock } = createRenderer({ clock: 'fake' });
 
   const baselineProps = {
@@ -50,7 +50,7 @@ describe('<DataGrid /> - Column Headers', () => {
     });
   });
 
-  describe('Column Menu', () => {
+  describe('Column menu', () => {
     it('should allow to hide column', () => {
       render(
         <div style={{ width: 300, height: 300 }}>
diff --git a/packages/grid/x-data-grid/src/tests/columnSpanning.DataGrid.test.tsx b/packages/grid/x-data-grid/src/tests/columnSpanning.DataGrid.test.tsx
index 449c975019c0..cb28bda8cdf2 100644
--- a/packages/grid/x-data-grid/src/tests/columnSpanning.DataGrid.test.tsx
+++ b/packages/grid/x-data-grid/src/tests/columnSpanning.DataGrid.test.tsx
@@ -6,7 +6,7 @@ import { getCell, getActiveCell, getColumnHeaderCell } from 'test/utils/helperFn
 
 const isJSDOM = /jsdom/.test(window.navigator.userAgent);
 
-describe('<DataGrid /> - Column Spanning', () => {
+describe('<DataGrid /> - Column spanning', () => {
   const { render, clock } = createRenderer({ clock: 'fake' });
 
   const baselineProps = {
diff --git a/packages/grid/x-data-grid/src/tests/columnsVisibility.DataGrid.test.tsx b/packages/grid/x-data-grid/src/tests/columnsVisibility.DataGrid.test.tsx
index a95ee66420f0..e932220f4648 100644
--- a/packages/grid/x-data-grid/src/tests/columnsVisibility.DataGrid.test.tsx
+++ b/packages/grid/x-data-grid/src/tests/columnsVisibility.DataGrid.test.tsx
@@ -11,7 +11,7 @@ const rows: GridRowsProp = [{ id: 1, idBis: 1 }];
 
 const columns: GridColDef[] = [{ field: 'id' }, { field: 'idBis' }];
 
-describe('<DataGridPro /> - Columns Visibility', () => {
+describe('<DataGridPro /> - Columns visibility', () => {
   const { render } = createRenderer();
 
   function TestDataGrid(
diff --git a/packages/grid/x-data-grid/src/tests/layout.DataGrid.test.tsx b/packages/grid/x-data-grid/src/tests/layout.DataGrid.test.tsx
index af9a37c187e1..a4ea76ef2107 100644
--- a/packages/grid/x-data-grid/src/tests/layout.DataGrid.test.tsx
+++ b/packages/grid/x-data-grid/src/tests/layout.DataGrid.test.tsx
@@ -14,7 +14,7 @@ import { useBasicDemoData } from '@mui/x-data-grid-generator';
 import { createTheme, ThemeProvider } from '@mui/material/styles';
 import { getColumnHeaderCell, getColumnValues, getCell, getRow, sleep } from 'test/utils/helperFn';
 
-describe('<DataGrid /> - Layout & Warnings', () => {
+describe('<DataGrid /> - Layout & warnings', () => {
   const { clock, render } = createRenderer();
 
   const baselineProps = {
diff --git a/packages/grid/x-data-grid/src/tests/quickFiltering.DataGrid.test.tsx b/packages/grid/x-data-grid/src/tests/quickFiltering.DataGrid.test.tsx
index 0cb32dc3c6b8..95c1d4002571 100644
--- a/packages/grid/x-data-grid/src/tests/quickFiltering.DataGrid.test.tsx
+++ b/packages/grid/x-data-grid/src/tests/quickFiltering.DataGrid.test.tsx
@@ -14,7 +14,7 @@ import { getColumnValues, sleep } from 'test/utils/helperFn';
 
 const isJSDOM = /jsdom/.test(window.navigator.userAgent);
 
-describe('<DataGrid /> - Quick Filter', () => {
+describe('<DataGrid /> - Quick filter', () => {
   const { render, clock } = createRenderer();
 
   const baselineProps = {
diff --git a/packages/grid/x-data-grid/src/tests/rowSelection.DataGrid.test.tsx b/packages/grid/x-data-grid/src/tests/rowSelection.DataGrid.test.tsx
index f24c7f694e12..405fb351a60a 100644
--- a/packages/grid/x-data-grid/src/tests/rowSelection.DataGrid.test.tsx
+++ b/packages/grid/x-data-grid/src/tests/rowSelection.DataGrid.test.tsx
@@ -34,7 +34,7 @@ function getSelectedRowIds() {
     );
 }
 
-describe('<DataGrid /> - Row Selection', () => {
+describe('<DataGrid /> - Row selection', () => {
   const { render, clock } = createRenderer();
 
   const defaultData = getBasicGridData(4, 2);