diff --git a/lld/test/ELF/lto/thinlto-index-only.ll b/lld/test/ELF/lto/thinlto-index-only.ll
index 3abc18e4875a..4a3764fcd391 100644
--- a/lld/test/ELF/lto/thinlto-index-only.ll
+++ b/lld/test/ELF/lto/thinlto-index-only.ll
@@ -41,7 +41,7 @@
 ; Ensure LLD generates an empty index for each bitcode file even if all bitcode files are lazy.
 ; RUN: rm -f %t1.o.thinlto.bc
 ; RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux-gnu /dev/null -o %tdummy.o
-; RUN: ld.lld --plugin-opt=thinlto-index-only -shared %tdummy.o --start-lib %t1.o --end-lib
+; RUN: ld.lld --plugin-opt=thinlto-index-only -shared %tdummy.o --start-lib %t1.o --end-lib -o %t4
 ; RUN: ls %t1.o.thinlto.bc
 
 ; NM: T f