diff --git a/packages/react-scripts/config/webpack.config.js b/packages/react-scripts/config/webpack.config.js
index 2b1b3bbd47d..c9ce3ad74f4 100644
--- a/packages/react-scripts/config/webpack.config.js
+++ b/packages/react-scripts/config/webpack.config.js
@@ -752,7 +752,7 @@ module.exports = function (webpackEnv) {
             ],
             exclude: [
               { file: '**/src/**/__tests__/**' },
-              { file: '**/src/**/?(*.){spec|test}.*' },
+              { file: '**/src/**/?(*.){spec,test}.*' },
               { file: '**/src/setupProxy.*' },
               { file: '**/src/setupTests.*' },
             ],