diff --git a/superset-frontend/.eslintrc.js b/superset-frontend/.eslintrc.js
index 39666417afa..c63532c97a9 100644
--- a/superset-frontend/.eslintrc.js
+++ b/superset-frontend/.eslintrc.js
@@ -83,7 +83,6 @@ module.exports = {
     'plugin:react-hooks/recommended',
     'plugin:react-prefer-function-component/recommended',
     'plugin:storybook/recommended',
-    'plugin:react-you-might-not-need-an-effect/legacy-recommended',
   ],
   parser: '@babel/eslint-parser',
   parserOptions: {
@@ -273,6 +272,10 @@ module.exports = {
     {
       files: ['packages/**'],
       rules: {
+        'import/no-extraneous-dependencies': [
+          'error',
+          { devDependencies: true },
+        ],
         'no-restricted-imports': [
           'error',
           {
@@ -324,7 +327,12 @@ module.exports = {
         '*.stories.tsx',
         '*.stories.jsx',
         'fixtures.*',
-        'playwright/**/*',
+        '**/test/**/*',
+        '**/tests/**/*',
+        'spec/**/*',
+        '**/fixtures/**/*',
+        '**/__mocks__/**/*',
+        '**/spec/**/*',
       ],
       excludedFiles: 'cypress-base/cypress/**/*',
       plugins: ['jest', 'jest-dom', 'no-only-tests', 'testing-library'],
@@ -348,7 +356,9 @@ module.exports = {
             devDependencies: true,
           },
         ],
+        'jest/consistent-test-it': 'error',
         'no-only-tests/no-only-tests': 'error',
+        'prefer-promise-reject-errors': 0,
         'max-classes-per-file': 0,
         // temporary rules to help with migration - please re-enable!
         'testing-library/await-async-queries': 0,
@@ -387,6 +397,12 @@ module.exports = {
         '*.stories.tsx',
         '*.stories.jsx',
         'fixtures.*',
+        '**/test/**/*',
+        '**/tests/**/*',
+        'spec/**/*',
+        '**/fixtures/**/*',
+        '**/__mocks__/**/*',
+        '**/spec/**/*',
         'cypress-base/cypress/**/*',
         'Stories.tsx',
         'packages/superset-ui-core/src/theme/index.tsx',
@@ -400,10 +416,27 @@ module.exports = {
       },
     },
     {
-      files: ['playwright/**/*'],
+      // Override specifically for packages stories and overview files
+      // This must come LAST to override other rules
+      files: [
+        'packages/**/*.stories.*',
+        'packages/**/*.overview.*',
+        'packages/**/fixtures.*',
+      ],
       rules: {
-        'import/no-unresolved': 0, // Playwright is not installed in main build
-        'import/no-extraneous-dependencies': 0, // Playwright is not installed in main build
+        'import/no-extraneous-dependencies': 'off',
+      },
+    },
+    {
+      // Allow @playwright/test imports in Playwright test files
+      files: ['playwright/**/*.ts', 'playwright/**/*.js'],
+      rules: {
+        'import/no-extraneous-dependencies': [
+          'error',
+          {
+            devDependencies: true,
+          },
+        ],
       },
     },
   ],
@@ -412,7 +445,13 @@ module.exports = {
     'theme-colors/no-literal-colors': 'error',
     'icons/no-fa-icons-usage': 'error',
     'i18n-strings/no-template-vars': ['error', true],
-    'i18n-strings/sentence-case-buttons': 'error',
+    camelcase: [
+      'error',
+      {
+        allow: ['^UNSAFE_'],
+        properties: 'never',
+      },
+    ],
     'class-methods-use-this': 0,
     curly: 2,
     'func-names': 0,
diff --git a/superset-frontend/packages/generator-superset/.eslintrc b/superset-frontend/packages/generator-superset/.eslintrc
deleted file mode 100644
index fd46989cba4..00000000000
--- a/superset-frontend/packages/generator-superset/.eslintrc
+++ /dev/null
@@ -1,25 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-{
-  "settings": {
-    "import/resolver": {
-      "typescript": {}
-    }
-  }
-}
diff --git a/superset-frontend/packages/superset-ui-chart-controls/test/operators/aggregateOperator.test.ts b/superset-frontend/packages/superset-ui-chart-controls/test/operators/aggregateOperator.test.ts
index 52e3e454078..ddc8d5785a8 100644
--- a/superset-frontend/packages/superset-ui-chart-controls/test/operators/aggregateOperator.test.ts
+++ b/superset-frontend/packages/superset-ui-chart-controls/test/operators/aggregateOperator.test.ts
@@ -40,7 +40,7 @@ describe('aggregationOperator', () => {
     granularity: 'month',
   };
 
-  test('should return undefined for LAST_VALUE aggregation', () => {
+  it('should return undefined for LAST_VALUE aggregation', () => {
     const formDataWithLastValue = {
       ...formData,
       aggregation: 'LAST_VALUE',
@@ -51,7 +51,7 @@ describe('aggregationOperator', () => {
     ).toBeUndefined();
   });
 
-  test('should return undefined when metrics is empty', () => {
+  it('should return undefined when metrics is empty', () => {
     const queryObjectWithoutMetrics = {
       ...queryObject,
       metrics: [],
@@ -67,7 +67,7 @@ describe('aggregationOperator', () => {
     ).toBeUndefined();
   });
 
-  test('should apply sum aggregation to all metrics', () => {
+  it('should apply sum aggregation to all metrics', () => {
     const formDataWithSum = {
       ...formData,
       aggregation: 'sum',
@@ -91,7 +91,7 @@ describe('aggregationOperator', () => {
     });
   });
 
-  test('should apply mean aggregation to all metrics', () => {
+  it('should apply mean aggregation to all metrics', () => {
     const formDataWithMean = {
       ...formData,
       aggregation: 'mean',
@@ -115,7 +115,7 @@ describe('aggregationOperator', () => {
     });
   });
 
-  test('should use default aggregation when not specified', () => {
+  it('should use default aggregation when not specified', () => {
     expect(aggregationOperator(formData, queryObject)).toBeUndefined();
   });
 });
diff --git a/superset-frontend/packages/superset-ui-core/.eslintrc b/superset-frontend/packages/superset-ui-core/.eslintrc
deleted file mode 100644
index e0ff7c67bb8..00000000000
--- a/superset-frontend/packages/superset-ui-core/.eslintrc
+++ /dev/null
@@ -1,68 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-{
-  "plugins": ["jest", "jest-dom", "no-only-tests", "testing-library"],
-  "env": {
-    "jest/globals": true
-  },
-  "settings": {
-    "jest": {
-      "version": "detect"
-    }
-  },
-  "extends": [
-    "plugin:jest/recommended",
-    "plugin:jest-dom/recommended",
-    "plugin:testing-library/react"
-  ],
-  "overrides": [
-	{
-  	  "files": [
-        "**/*.stories.*",
-        "**/*.overview.*",
-        "**/fixtures.*"
-      ],
-  	  "rules": {
-        "import/no-extraneous-dependencies": "off"
-      }
-	}
-  ],
-  "rules": {
-    "import/no-extraneous-dependencies": ["error", { "devDependencies": true }],
-    "jest/consistent-test-it": "error",
-    "no-only-tests/no-only-tests": "error",
-    "prefer-promise-reject-errors": 0,
-
-    "testing-library/no-node-access": "off",
-    "testing-library/prefer-screen-queries": "off",
-    "testing-library/no-container": "off",
-    "testing-library/await-async-queries": "off",
-    "testing-library/await-async-utils": "off",
-    "testing-library/no-await-sync-events": "off",
-    "testing-library/no-render-in-lifecycle": "off",
-    "testing-library/no-unnecessary-act": "off",
-    "testing-library/no-wait-for-multiple-assertions": "off",
-    "testing-library/await-async-events": "off",
-    "testing-library/no-wait-for-side-effects": "off",
-    "testing-library/prefer-presence-queries": "off",
-    "testing-library/render-result-naming-convention": "off",
-    "testing-library/prefer-find-by": "off",
-    "testing-library/no-manual-cleanup": "off"
-  }
-}
diff --git a/superset-frontend/plugins/legacy-preset-chart-deckgl/src/layers/Polygon/Polygon.test.tsx b/superset-frontend/plugins/legacy-preset-chart-deckgl/src/layers/Polygon/Polygon.test.tsx
index a3d97f48803..23512663b68 100644
--- a/superset-frontend/plugins/legacy-preset-chart-deckgl/src/layers/Polygon/Polygon.test.tsx
+++ b/superset-frontend/plugins/legacy-preset-chart-deckgl/src/layers/Polygon/Polygon.test.tsx
@@ -122,7 +122,7 @@ describe('DeckGLPolygon bucket generation logic', () => {
   const renderWithTheme = (component: React.ReactElement) =>
     render(<ThemeProvider theme={supersetTheme}>{component}</ThemeProvider>);
 
-  test('should use getBuckets for linear_palette color scheme', () => {
+  it('should use getBuckets for linear_palette color scheme', () => {
     const propsWithLinearPalette = {
       ...mockProps,
       formData: {
@@ -138,7 +138,7 @@ describe('DeckGLPolygon bucket generation logic', () => {
     expect(mockGetColorBreakpointsBuckets).not.toHaveBeenCalled();
   });
 
-  test('should use getBuckets for fixed_color color scheme', () => {
+  it('should use getBuckets for fixed_color color scheme', () => {
     const propsWithFixedColor = {
       ...mockProps,
       formData: {
@@ -154,7 +154,7 @@ describe('DeckGLPolygon bucket generation logic', () => {
     expect(mockGetColorBreakpointsBuckets).not.toHaveBeenCalled();
   });
 
-  test('should use getColorBreakpointsBuckets for color_breakpoints scheme', () => {
+  it('should use getColorBreakpointsBuckets for color_breakpoints scheme', () => {
     const propsWithBreakpoints = {
       ...mockProps,
       formData: {
@@ -187,7 +187,7 @@ describe('DeckGLPolygon bucket generation logic', () => {
     expect(mockGetBuckets).not.toHaveBeenCalled();
   });
 
-  test('should use getBuckets when color_scheme_type is undefined (backward compatibility)', () => {
+  it('should use getBuckets when color_scheme_type is undefined (backward compatibility)', () => {
     const propsWithUndefinedScheme = {
       ...mockProps,
       formData: {
@@ -203,7 +203,7 @@ describe('DeckGLPolygon bucket generation logic', () => {
     expect(mockGetColorBreakpointsBuckets).not.toHaveBeenCalled();
   });
 
-  test('should use getBuckets for unsupported color schemes (categorical_palette)', () => {
+  it('should use getBuckets for unsupported color schemes (categorical_palette)', () => {
     const propsWithUnsupportedScheme = {
       ...mockProps,
       formData: {
@@ -230,7 +230,7 @@ describe('DeckGLPolygon Error Handling and Edge Cases', () => {
   const renderWithTheme = (component: React.ReactElement) =>
     render(<ThemeProvider theme={supersetTheme}>{component}</ThemeProvider>);
 
-  test('handles empty features data gracefully', () => {
+  it('handles empty features data gracefully', () => {
     const propsWithEmptyData = {
       ...mockProps,
       payload: {
@@ -249,7 +249,7 @@ describe('DeckGLPolygon Error Handling and Edge Cases', () => {
     expect(mockGetColorBreakpointsBuckets).not.toHaveBeenCalled();
   });
 
-  test('handles missing color_breakpoints for color_breakpoints scheme', () => {
+  it('handles missing color_breakpoints for color_breakpoints scheme', () => {
     const propsWithMissingBreakpoints = {
       ...mockProps,
       formData: {
@@ -266,7 +266,7 @@ describe('DeckGLPolygon Error Handling and Edge Cases', () => {
     expect(mockGetBuckets).not.toHaveBeenCalled();
   });
 
-  test('handles null legend_position correctly', () => {
+  it('handles null legend_position correctly', () => {
     const propsWithNullLegendPosition = {
       ...mockProps,
       formData: {
@@ -294,7 +294,7 @@ describe('DeckGLPolygon Legend Integration', () => {
   const renderWithTheme = (component: React.ReactElement) =>
     render(<ThemeProvider theme={supersetTheme}>{component}</ThemeProvider>);
 
-  test('renders legend with non-empty categories when metric and linear_palette are defined', () => {
+  it('renders legend with non-empty categories when metric and linear_palette are defined', () => {
     const { container } = renderWithTheme(<DeckGLPolygon {...mockProps} />);
 
     // Verify the component renders and calls the correct bucket function
@@ -309,7 +309,7 @@ describe('DeckGLPolygon Legend Integration', () => {
     expect(Object.keys(categoriesData)).toHaveLength(2);
   });
 
-  test('does not render legend when metric is null', () => {
+  it('does not render legend when metric is null', () => {
     const propsWithoutMetric = {
       ...mockProps,
       formData: {
@@ -326,7 +326,7 @@ describe('DeckGLPolygon Legend Integration', () => {
 });
 
 describe('getPoints utility', () => {
-  test('extracts points from polygon data', () => {
+  it('extracts points from polygon data', () => {
     const data = [
       {
         polygon: [
diff --git a/superset-frontend/plugins/legacy-preset-chart-deckgl/src/layers/spatialUtils.test.ts b/superset-frontend/plugins/legacy-preset-chart-deckgl/src/layers/spatialUtils.test.ts
index c169ed4c33f..fbe222f78f3 100644
--- a/superset-frontend/plugins/legacy-preset-chart-deckgl/src/layers/spatialUtils.test.ts
+++ b/superset-frontend/plugins/legacy-preset-chart-deckgl/src/layers/spatialUtils.test.ts
@@ -64,7 +64,7 @@ Object.defineProperty(document, 'getElementById', {
 const mockDecode = decode as jest.MockedFunction<typeof decode>;
 
 describe('spatialUtils', () => {
-  test('getSpatialColumns returns correct columns for latlong type', () => {
+  it('getSpatialColumns returns correct columns for latlong type', () => {
     const spatial: SpatialFormData['spatial'] = {
       type: 'latlong',
       lonCol: 'longitude',
@@ -75,7 +75,7 @@ describe('spatialUtils', () => {
     expect(result).toEqual(['longitude', 'latitude']);
   });
 
-  test('getSpatialColumns returns correct columns for delimited type', () => {
+  it('getSpatialColumns returns correct columns for delimited type', () => {
     const spatial: SpatialFormData['spatial'] = {
       type: 'delimited',
       lonlatCol: 'coordinates',
@@ -85,7 +85,7 @@ describe('spatialUtils', () => {
     expect(result).toEqual(['coordinates']);
   });
 
-  test('getSpatialColumns returns correct columns for geohash type', () => {
+  it('getSpatialColumns returns correct columns for geohash type', () => {
     const spatial: SpatialFormData['spatial'] = {
       type: 'geohash',
       geohashCol: 'geohash_code',
@@ -95,16 +95,16 @@ describe('spatialUtils', () => {
     expect(result).toEqual(['geohash_code']);
   });
 
-  test('getSpatialColumns throws error when spatial is null', () => {
+  it('getSpatialColumns throws error when spatial is null', () => {
     expect(() => getSpatialColumns(null as any)).toThrow('Bad spatial key');
   });
 
-  test('getSpatialColumns throws error when spatial type is missing', () => {
+  it('getSpatialColumns throws error when spatial type is missing', () => {
     const spatial = {} as SpatialFormData['spatial'];
     expect(() => getSpatialColumns(spatial)).toThrow('Bad spatial key');
   });
 
-  test('getSpatialColumns throws error when latlong columns are missing', () => {
+  it('getSpatialColumns throws error when latlong columns are missing', () => {
     const spatial: SpatialFormData['spatial'] = {
       type: 'latlong',
     };
@@ -113,7 +113,7 @@ describe('spatialUtils', () => {
     );
   });
 
-  test('getSpatialColumns throws error when delimited column is missing', () => {
+  it('getSpatialColumns throws error when delimited column is missing', () => {
     const spatial: SpatialFormData['spatial'] = {
       type: 'delimited',
     };
@@ -122,7 +122,7 @@ describe('spatialUtils', () => {
     );
   });
 
-  test('getSpatialColumns throws error when geohash column is missing', () => {
+  it('getSpatialColumns throws error when geohash column is missing', () => {
     const spatial: SpatialFormData['spatial'] = {
       type: 'geohash',
     };
@@ -131,7 +131,7 @@ describe('spatialUtils', () => {
     );
   });
 
-  test('getSpatialColumns throws error for unknown spatial type', () => {
+  it('getSpatialColumns throws error for unknown spatial type', () => {
     const spatial = {
       type: 'unknown',
     } as any;
@@ -140,7 +140,7 @@ describe('spatialUtils', () => {
     );
   });
 
-  test('addSpatialNullFilters adds null filters for spatial columns', () => {
+  it('addSpatialNullFilters adds null filters for spatial columns', () => {
     const spatial: SpatialFormData['spatial'] = {
       type: 'latlong',
       lonCol: 'longitude',
@@ -159,7 +159,7 @@ describe('spatialUtils', () => {
     ]);
   });
 
-  test('addSpatialNullFilters returns original filters when spatial is null', () => {
+  it('addSpatialNullFilters returns original filters when spatial is null', () => {
     const existingFilters: QueryObjectFilterClause[] = [
       { col: 'test_col', op: '==', val: 'test' },
     ];
@@ -168,7 +168,7 @@ describe('spatialUtils', () => {
     expect(result).toBe(existingFilters);
   });
 
-  test('addSpatialNullFilters works with empty filters array', () => {
+  it('addSpatialNullFilters works with empty filters array', () => {
     const spatial: SpatialFormData['spatial'] = {
       type: 'delimited',
       lonlatCol: 'coordinates',
@@ -181,7 +181,7 @@ describe('spatialUtils', () => {
     ]);
   });
 
-  test('buildSpatialQuery throws error when spatial is missing', () => {
+  it('buildSpatialQuery throws error when spatial is missing', () => {
     const formData = {} as SpatialFormData;
 
     expect(() => buildSpatialQuery(formData)).toThrow(
@@ -189,7 +189,7 @@ describe('spatialUtils', () => {
     );
   });
 
-  test('buildSpatialQuery calls buildQueryContext with correct parameters', () => {
+  it('buildSpatialQuery calls buildQueryContext with correct parameters', () => {
     const mockBuildQueryContext =
       jest.requireMock('@superset-ui/core').buildQueryContext;
     const formData: SpatialFormData = {
@@ -209,7 +209,7 @@ describe('spatialUtils', () => {
     });
   });
 
-  test('processSpatialData processes latlong data correctly', () => {
+  it('processSpatialData processes latlong data correctly', () => {
     const records = [
       { longitude: -122.4, latitude: 37.8, count: 10, extra: 'test1' },
       { longitude: -122.5, latitude: 37.9, count: 20, extra: 'test2' },
@@ -237,7 +237,7 @@ describe('spatialUtils', () => {
     });
   });
 
-  test('processSpatialData processes delimited data correctly', () => {
+  it('processSpatialData processes delimited data correctly', () => {
     const records = [
       { coordinates: '-122.4,37.8', count: 15 },
       { coordinates: '-122.5,37.9', count: 25 },
@@ -257,7 +257,7 @@ describe('spatialUtils', () => {
     });
   });
 
-  test('processSpatialData processes geohash data correctly', () => {
+  it('processSpatialData processes geohash data correctly', () => {
     mockDecode.mockReturnValue({
       latitude: 37.8,
       longitude: -122.4,
@@ -284,7 +284,7 @@ describe('spatialUtils', () => {
     expect(mockDecode).toHaveBeenCalledWith('dr5regw3p');
   });
 
-  test('processSpatialData reverses coordinates when reverseCheckbox is true', () => {
+  it('processSpatialData reverses coordinates when reverseCheckbox is true', () => {
     const records = [{ longitude: -122.4, latitude: 37.8, count: 10 }];
     const spatial: SpatialFormData['spatial'] = {
       type: 'latlong',
@@ -298,7 +298,7 @@ describe('spatialUtils', () => {
     expect(result[0].position).toEqual([37.8, -122.4]);
   });
 
-  test('processSpatialData handles invalid coordinates', () => {
+  it('processSpatialData handles invalid coordinates', () => {
     const records = [
       { longitude: 'invalid', latitude: 37.8, count: 10 },
       { longitude: -122.4, latitude: NaN, count: 20 },
@@ -318,7 +318,7 @@ describe('spatialUtils', () => {
     expect(result).toHaveLength(0);
   });
 
-  test('processSpatialData handles missing metric values', () => {
+  it('processSpatialData handles missing metric values', () => {
     const records = [
       { longitude: -122.4, latitude: 37.8, count: null },
       { longitude: -122.5, latitude: 37.9 },
@@ -338,7 +338,7 @@ describe('spatialUtils', () => {
     expect(result[2].weight).toBe(1);
   });
 
-  test('processSpatialData returns empty array for empty records', () => {
+  it('processSpatialData returns empty array for empty records', () => {
     const spatial: SpatialFormData['spatial'] = {
       type: 'latlong',
       lonCol: 'longitude',
@@ -350,7 +350,7 @@ describe('spatialUtils', () => {
     expect(result).toEqual([]);
   });
 
-  test('processSpatialData returns empty array when spatial is null', () => {
+  it('processSpatialData returns empty array when spatial is null', () => {
     const records = [{ longitude: -122.4, latitude: 37.8 }];
 
     const result = processSpatialData(records, null as any);
@@ -358,7 +358,7 @@ describe('spatialUtils', () => {
     expect(result).toEqual([]);
   });
 
-  test('processSpatialData handles delimited coordinate edge cases', () => {
+  it('processSpatialData handles delimited coordinate edge cases', () => {
     const records = [
       { coordinates: '', count: 10 },
       { coordinates: null, count: 20 },
@@ -382,7 +382,7 @@ describe('spatialUtils', () => {
     });
   });
 
-  test('processSpatialData copies additional properties correctly', () => {
+  it('processSpatialData copies additional properties correctly', () => {
     const records = [
       {
         longitude: -122.4,
@@ -416,7 +416,7 @@ describe('spatialUtils', () => {
     expect(result[0]).not.toHaveProperty('extra_col');
   });
 
-  test('transformSpatialProps transforms chart props correctly', () => {
+  it('transformSpatialProps transforms chart props correctly', () => {
     const mockGetMetricLabel =
       jest.requireMock('@superset-ui/core').getMetricLabel;
     mockGetMetricLabel.mockReturnValue('count_label');
@@ -510,7 +510,7 @@ describe('spatialUtils', () => {
     expect(result.payload.data.metricLabels).toEqual(['count_label']);
   });
 
-  test('transformSpatialProps handles missing hooks gracefully', () => {
+  it('transformSpatialProps handles missing hooks gracefully', () => {
     const chartProps: ChartProps = {
       datasource: {
         id: 1,
@@ -556,7 +556,7 @@ describe('spatialUtils', () => {
     expect(typeof result.setTooltip).toBe('function');
   });
 
-  test('transformSpatialProps handles missing metric', () => {
+  it('transformSpatialProps handles missing metric', () => {
     const mockGetMetricLabel =
       jest.requireMock('@superset-ui/core').getMetricLabel;
     mockGetMetricLabel.mockReturnValue(undefined);
diff --git a/superset-frontend/plugins/plugin-chart-echarts/src/utils/themeOverrides.test.ts b/superset-frontend/plugins/plugin-chart-echarts/src/utils/themeOverrides.test.ts
index 931f026cb5f..5cf6bbd01a4 100644
--- a/superset-frontend/plugins/plugin-chart-echarts/src/utils/themeOverrides.test.ts
+++ b/superset-frontend/plugins/plugin-chart-echarts/src/utils/themeOverrides.test.ts
@@ -19,7 +19,7 @@
 import { mergeReplaceArrays } from '@superset-ui/core';
 
 describe('Theme Override Deep Merge Behavior', () => {
-  test('should merge nested objects correctly', () => {
+  it('should merge nested objects correctly', () => {
     const baseOptions = {
       grid: {
         left: '5%',
@@ -67,7 +67,7 @@ describe('Theme Override Deep Merge Behavior', () => {
     });
   });
 
-  test('should replace arrays instead of merging them', () => {
+  it('should replace arrays instead of merging them', () => {
     const baseOptions = {
       series: [
         { name: 'Series 1', type: 'line' },
@@ -86,7 +86,7 @@ describe('Theme Override Deep Merge Behavior', () => {
     expect(result.series).toHaveLength(1);
   });
 
-  test('should handle null overrides correctly', () => {
+  it('should handle null overrides correctly', () => {
     const baseOptions = {
       grid: {
         left: '5%',
@@ -127,7 +127,7 @@ describe('Theme Override Deep Merge Behavior', () => {
     });
   });
 
-  test('should handle override precedence correctly', () => {
+  it('should handle override precedence correctly', () => {
     const baseTheme = {
       textStyle: { color: '#000', fontSize: 12 },
     };
@@ -167,7 +167,7 @@ describe('Theme Override Deep Merge Behavior', () => {
     });
   });
 
-  test('should preserve deep nested structures', () => {
+  it('should preserve deep nested structures', () => {
     const baseOptions = {
       xAxis: {
         axisLabel: {
@@ -215,7 +215,7 @@ describe('Theme Override Deep Merge Behavior', () => {
     });
   });
 
-  test('should handle function values correctly', () => {
+  it('should handle function values correctly', () => {
     const formatFunction = (value: any) => `${value}%`;
     const overrideFunction = (value: any) => `$${value}`;
 
@@ -241,7 +241,7 @@ describe('Theme Override Deep Merge Behavior', () => {
     expect(result.yAxis.axisLabel.formatter('100')).toBe('$100');
   });
 
-  test('should handle empty objects and arrays', () => {
+  it('should handle empty objects and arrays', () => {
     const baseOptions = {
       series: [{ name: 'Test', data: [1, 2, 3] }],
       grid: { left: '5%' },
diff --git a/superset-frontend/plugins/plugin-chart-echarts/test/MixedTimeseries/transformProps.test.ts b/superset-frontend/plugins/plugin-chart-echarts/test/MixedTimeseries/transformProps.test.ts
index a403a464e75..2ececa1a877 100644
--- a/superset-frontend/plugins/plugin-chart-echarts/test/MixedTimeseries/transformProps.test.ts
+++ b/superset-frontend/plugins/plugin-chart-echarts/test/MixedTimeseries/transformProps.test.ts
@@ -117,7 +117,7 @@ const chartPropsConfig = {
   theme: supersetTheme,
 };
 
-it('should transform chart props for viz with showQueryIdentifiers=false', () => {
+test('should transform chart props for viz with showQueryIdentifiers=false', () => {
   const chartPropsConfigWithoutIdentifiers = {
     ...chartPropsConfig,
     formData: {
@@ -158,7 +158,7 @@ it('should transform chart props for viz with showQueryIdentifiers=false', () =>
   ]);
 });
 
-it('should transform chart props for viz with showQueryIdentifiers=true', () => {
+test('should transform chart props for viz with showQueryIdentifiers=true', () => {
   const chartPropsConfigWithIdentifiers = {
     ...chartPropsConfig,
     formData: {
@@ -259,7 +259,7 @@ describe('legend sorting', () => {
   });
 });
 
-it('legend margin: top orientation sets grid.top correctly', () => {
+test('legend margin: top orientation sets grid.top correctly', () => {
   const chartPropsConfigWithoutIdentifiers = {
     ...chartPropsConfig,
     formData: {
@@ -274,7 +274,7 @@ it('legend margin: top orientation sets grid.top correctly', () => {
   expect((transformed.echartOptions.grid as any).top).toEqual(270);
 });
 
-it('legend margin: bottom orientation sets grid.bottom correctly', () => {
+test('legend margin: bottom orientation sets grid.bottom correctly', () => {
   const chartPropsConfigWithoutIdentifiers = {
     ...chartPropsConfig,
     formData: {
@@ -290,7 +290,7 @@ it('legend margin: bottom orientation sets grid.bottom correctly', () => {
   expect((transformed.echartOptions.grid as any).bottom).toEqual(270);
 });
 
-it('legend margin: left orientation sets grid.left correctly', () => {
+test('legend margin: left orientation sets grid.left correctly', () => {
   const chartPropsConfigWithoutIdentifiers = {
     ...chartPropsConfig,
     formData: {
@@ -306,7 +306,7 @@ it('legend margin: left orientation sets grid.left correctly', () => {
   expect((transformed.echartOptions.grid as any).left).toEqual(270);
 });
 
-it('legend margin: right orientation sets grid.right correctly', () => {
+test('legend margin: right orientation sets grid.right correctly', () => {
   const chartPropsConfigWithoutIdentifiers = {
     ...chartPropsConfig,
     formData: {
diff --git a/superset-frontend/plugins/plugin-chart-echarts/test/Timeseries/transformers.test.ts b/superset-frontend/plugins/plugin-chart-echarts/test/Timeseries/transformers.test.ts
index 8f04e1c4031..954221d56c8 100644
--- a/superset-frontend/plugins/plugin-chart-echarts/test/Timeseries/transformers.test.ts
+++ b/superset-frontend/plugins/plugin-chart-echarts/test/Timeseries/transformers.test.ts
@@ -32,7 +32,7 @@ const mockColorScale = jest.fn(
 describe('transformSeries', () => {
   const series = { name: 'test-series' };
 
-  test('should use the colorScaleKey if timeShiftColor is enabled', () => {
+  it('should use the colorScaleKey if timeShiftColor is enabled', () => {
     const opts = {
       timeShiftColor: true,
       colorScaleKey: 'test-key',
@@ -44,7 +44,7 @@ describe('transformSeries', () => {
     expect((result as any)?.itemStyle.color).toBe('color-for-test-key-1');
   });
 
-  test('should use seriesKey if timeShiftColor is not enabled', () => {
+  it('should use seriesKey if timeShiftColor is not enabled', () => {
     const opts = {
       timeShiftColor: false,
       seriesKey: 'series-key',
@@ -56,7 +56,7 @@ describe('transformSeries', () => {
     expect((result as any)?.itemStyle.color).toBe('color-for-series-key-2');
   });
 
-  test('should apply border styles for bar series with connectNulls', () => {
+  it('should apply border styles for bar series with connectNulls', () => {
     const opts = {
       seriesType: EchartsTimeseriesSeriesType.Bar,
       connectNulls: true,
@@ -72,7 +72,7 @@ describe('transformSeries', () => {
     );
   });
 
-  test('should not apply border styles for non-bar series', () => {
+  it('should not apply border styles for non-bar series', () => {
     const opts = {
       seriesType: EchartsTimeseriesSeriesType.Line,
       connectNulls: true,
@@ -88,7 +88,7 @@ describe('transformSeries', () => {
 });
 
 describe('transformNegativeLabelsPosition', () => {
-  test('label position bottom of negative value no Horizontal', () => {
+  it('label position bottom of negative value no Horizontal', () => {
     const isHorizontal = false;
     const series: SeriesOption = {
       data: [
@@ -112,7 +112,7 @@ describe('transformNegativeLabelsPosition', () => {
     expect((result as any)[4].label).toBe(undefined);
   });
 
-  test('label position left of negative value is Horizontal', () => {
+  it('label position left of negative value is Horizontal', () => {
     const isHorizontal = true;
     const series: SeriesOption = {
       data: [
@@ -137,7 +137,7 @@ describe('transformNegativeLabelsPosition', () => {
     expect((result as any)[4].label.position).toBe('outside');
   });
 
-  test('label position to line type', () => {
+  it('label position to line type', () => {
     const isHorizontal = false;
     const series: SeriesOption = {
       data: [
@@ -165,7 +165,7 @@ describe('transformNegativeLabelsPosition', () => {
     expect((result as any)[4].label).toBe(undefined);
   });
 
-  test('label position to bar type and stack', () => {
+  it('label position to bar type and stack', () => {
     const isHorizontal = false;
     const series: SeriesOption = {
       data: [
diff --git a/superset-frontend/spec/.eslintrc b/superset-frontend/spec/.eslintrc
deleted file mode 100644
index 7e3683e803c..00000000000
--- a/superset-frontend/spec/.eslintrc
+++ /dev/null
@@ -1,40 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-{
-  "plugins": ["jest", "jest-dom", "no-only-tests", "testing-library"],
-  "env": {
-    "jest/globals": true
-  },
-  "settings": {
-    "jest": {
-      "version": "detect"
-    }
-  },
-  "extends": [
-    "plugin:jest/recommended",
-    "plugin:jest-dom/recommended",
-    "plugin:testing-library/react"
-  ],
-  "rules": {
-    "import/no-extraneous-dependencies": ["error", { "devDependencies": true }],
-    "jest/consistent-test-it": "error",
-    "no-only-tests/no-only-tests": "error",
-    "prefer-promise-reject-errors": 0
-  }
-}
diff --git a/superset-frontend/spec/javascripts/dashboard/.eslintrc b/superset-frontend/spec/javascripts/dashboard/.eslintrc
deleted file mode 100644
index 7a8a576a8c5..00000000000
--- a/superset-frontend/spec/javascripts/dashboard/.eslintrc
+++ /dev/null
@@ -1,30 +0,0 @@
-{
-  "extends": "prettier",
-  "plugins": ["prettier"],
-  "rules": {
-    "prefer-template": 2,
-    "new-cap": 2,
-    "no-restricted-syntax": 2,
-    "guard-for-in": 2,
-    "prefer-arrow-callback": 2,
-    "func-names": 2,
-    "react/jsx-no-bind": 2,
-    "no-confusing-arrow": 2,
-    "jsx-a11y/no-static-element-interactions": 2,
-    "jsx-a11y/anchor-has-content": 2,
-    "react/require-default-props": 2,
-    "no-plusplus": 2,
-    "no-mixed-operators": 0,
-    "no-continue": 2,
-    "no-bitwise": 2,
-    "no-multi-assign": 2,
-    "no-restricted-properties": 2,
-    "no-prototype-builtins": 2,
-    "class-methods-use-this": 2,
-    "import/no-named-as-default": 2,
-    "react/no-unescaped-entities": 2,
-    "react/no-string-refs": 2,
-    "react/jsx-indent": 0,
-    "prettier/prettier": "error"
-  }
-}