diff --git a/packages/jest-preset-default/CHANGELOG.md b/packages/jest-preset-default/CHANGELOG.md
index 50da0d1120724..de7850ac29325 100644
--- a/packages/jest-preset-default/CHANGELOG.md
+++ b/packages/jest-preset-default/CHANGELOG.md
@@ -6,6 +6,10 @@
 
 -   Increase the minimum Node.js version to 14 ([#43141](https://github.com/WordPress/gutenberg/pull/43141)).
 
+### Bug Fix
+
+-   Jest Preset: Improve `is-plain-obj` transformation ignore ([#43271](https://github.com/WordPress/gutenberg/pull/43271)).
+
 ## 8.5.1 (2022-08-12)
 
 ### Bug Fix
diff --git a/packages/jest-preset-default/jest-preset.js b/packages/jest-preset-default/jest-preset.js
index 41a018117f105..8ae974b500117 100644
--- a/packages/jest-preset-default/jest-preset.js
+++ b/packages/jest-preset-default/jest-preset.js
@@ -29,5 +29,5 @@ module.exports = {
 	transform: {
 		'\\.[jt]sx?$': require.resolve( 'babel-jest' ),
 	},
-	transformIgnorePatterns: [ 'node_modules/(?!(is-plain-obj))' ],
+	transformIgnorePatterns: [ 'node_modules/(?:(?!is-plain-obj/).)*$' ],
 };
diff --git a/packages/scripts/CHANGELOG.md b/packages/scripts/CHANGELOG.md
index c5c7c0c212df1..1a7e63657ac80 100644
--- a/packages/scripts/CHANGELOG.md
+++ b/packages/scripts/CHANGELOG.md
@@ -7,6 +7,10 @@
 -   Increase the minimum Node.js version to 14 and minimum npm version to 6.14.4 ([#43141](https://github.com/WordPress/gutenberg/pull/43141)).
 -   The bundled `@wordpress/eslint-plugin` package got updated to the new major version and the default linting for Jest unit tests is now handled in the default config in this package ([#43272](https://github.com/WordPress/gutenberg/pull/43272)).
 
+### Bug Fix
+
+-   Jest Preset: Improve `is-plain-obj` transformation ignore ([#43271](https://github.com/WordPress/gutenberg/pull/43271)).
+
 ## 23.7.1 (2022-08-12)
 
 ### Bug Fix