diff --git a/packages/browser/src/plugins/segmentio/__tests__/normalize.test.ts b/packages/browser/src/plugins/segmentio/__tests__/normalize.test.ts
index afdeba2dd..5147ae850 100644
--- a/packages/browser/src/plugins/segmentio/__tests__/normalize.test.ts
+++ b/packages/browser/src/plugins/segmentio/__tests__/normalize.test.ts
@@ -294,6 +294,7 @@ describe('before loading', () => {
       assert(object)
       assert(object.context)
       assert(object.context.campaign === undefined)
+      assert(object.context.referrer === undefined)
     })
 
     it('should add .referrer.id and .referrer.type (cookies)', () => {