diff --git a/alfa-client/jest.preset.js b/alfa-client/jest.preset.js
index e56827c76fd13112f82f0b5350630459926d6975..5d900d715c763167022577290b88f2aa9203257a 100644
--- a/alfa-client/jest.preset.js
+++ b/alfa-client/jest.preset.js
@@ -28,5 +28,5 @@ module.exports = {
 	moduleNameMapper: {
 		'lodash-es': 'lodash',
 	},
-	workerIdleMemoryLimit: '1024GB'
+	workerIdleMemoryLimit: '1024MB'
 };