diff --git a/.eslintignore b/.eslintignore
index be871474495..140eca961b1 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -2,5 +2,3 @@ node_modules
 build
 lib
 esm
-*.json
-*.svg
\ No newline at end of file
diff --git a/package.json b/package.json
index c90bc9ca31a..ac1c3fc5a1d 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
         "test": "yarn -s test-unit && yarn -s test-e2e",
         "test-ci": "yarn -s test-unit-ci && yarn -s test-e2e",
         "doc": "cd docs && jekyll server . --watch",
-        "lint": "eslint \"./packages/**/src/**/*.*\" \"./examples/**/src/**/*.*\" \"./cypress/**/*.*\"",
+        "lint": "eslint \"./packages/**/src/**/*.{js,ts,tsx}\" \"./examples/**/src/**/*.{js,ts,tsx}\" \"./cypress/**/*.{js,ts,tsx}\"",
         "prettier": "prettier --config ./.prettierrc.js --write --list-different \"packages/*/src/**/*.{js,json,ts,tsx,css,md}\" \"examples/*/src/**/*.{js,ts,json,tsx,css,md}\" \"cypress/**/*.{js,ts,json,tsx,css,md}\"",
         "run-simple": "cd examples/simple && yarn -s start",
         "run-tutorial": "yarn run -s build && cd examples/tutorial && yarn -s start",
diff --git a/packages/ra-core/src/reducer/admin/resource/data.spec.ts b/packages/ra-core/src/reducer/admin/resource/data.spec.ts
index 0a936557067..a130493fe82 100644
--- a/packages/ra-core/src/reducer/admin/resource/data.spec.ts
+++ b/packages/ra-core/src/reducer/admin/resource/data.spec.ts
@@ -1,11 +1,11 @@
 import assert from 'assert';
 
 import { DELETE, DELETE_MANY } from '../../../dataFetchActions';
-
-jest.mock('../../../util/getFetchedAt');
 import getFetchedAt from '../../../util/getFetchedAt';
 import dataReducer, { addRecords } from './data';
 
+jest.mock('../../../util/getFetchedAt');
+
 describe('data addRecordsFactory', () => {
     it('should call getFetchedAt with newRecords ids and oldRecordFetchedAt and return records returned by getFetchedAt', () => {
         const newRecords = [{ id: 'record1' }, { id: 'record2' }];