diff --git a/object-assign/object-assign-tests.ts b/object-assign/object-assign-tests.ts
index d1304422d3..d285219b24 100644
--- a/object-assign/object-assign-tests.ts
+++ b/object-assign/object-assign-tests.ts
@@ -38,7 +38,7 @@ interface Result4 extends Result4, Source3 {
 }
 
 interface Source5 {
-  source2: string;
+  source5: string;
 }
 
 interface Result5 extends Result4, Source5 {