diff --git a/packages/jest-transform/src/ScriptTransformer.ts b/packages/jest-transform/src/ScriptTransformer.ts
index 09f611c67332..3057dbe6586e 100644
--- a/packages/jest-transform/src/ScriptTransformer.ts
+++ b/packages/jest-transform/src/ScriptTransformer.ts
@@ -475,7 +475,7 @@ export default class ScriptTransformer {
         }
       },
       {
-        exts: [path.extname(moduleName)],
+        exts: this._config.moduleFileExtensions.map(ext => `.${ext}`),
         ignoreNodeModules: false,
         matcher: filename => {
           if (transforming) {