diff --git a/packages/react-scripts/scripts/utils/createJestConfig.js b/packages/react-scripts/scripts/utils/createJestConfig.js
index 6a7b62f94..201059f37 100644
--- a/packages/react-scripts/scripts/utils/createJestConfig.js
+++ b/packages/react-scripts/scripts/utils/createJestConfig.js
@@ -26,7 +26,7 @@ module.exports = (resolve, rootDir) => {
     collectCoverageFrom: ['src/**/*.{js,jsx,ts,tsx}'],
     setupFiles: [resolve('config/polyfills.js')],
     setupTestFrameworkScriptFile: setupTestsFile,
-    moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx'],
+    moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json'],
     testMatch: [
       '<rootDir>/src/**/__tests__/**/*.ts?(x)',
       '<rootDir>/src/**/?(*.)(spec|test).ts?(x)',