diff --git a/packages/jest-preset-default/jest-preset.js b/packages/jest-preset-default/jest-preset.js
index 707118566cb8a..41a018117f105 100644
--- a/packages/jest-preset-default/jest-preset.js
+++ b/packages/jest-preset-default/jest-preset.js
@@ -29,4 +29,5 @@ module.exports = {
 	transform: {
 		'\\.[jt]sx?$': require.resolve( 'babel-jest' ),
 	},
+	transformIgnorePatterns: [ 'node_modules/(?!(is-plain-obj))' ],
 };
diff --git a/test/unit/jest.config.js b/test/unit/jest.config.js
index 2294974ffea32..c430aae0ed244 100644
--- a/test/unit/jest.config.js
+++ b/test/unit/jest.config.js
@@ -36,7 +36,6 @@ module.exports = {
 	transform: {
 		'^.+\\.[jt]sx?$': '<rootDir>/test/unit/scripts/babel-transformer.js',
 	},
-	transformIgnorePatterns: [ 'node_modules/(?!(is-plain-obj))' ],
 	snapshotSerializers: [
 		'enzyme-to-json/serializer',
 		'@emotion/jest/serializer',