diff --git a/flang/test/Driver/underscoring.f90 b/flang/test/Driver/underscoring.f90
index 7c03d040504ea..8a9ed80ea4dab 100644
--- a/flang/test/Driver/underscoring.f90
+++ b/flang/test/Driver/underscoring.f90
@@ -21,4 +21,4 @@ subroutine test()
 ! NO-UNDERSCORING-NOT: ext_sub_
 ! NO-UNDERSCORING: {{ext_sub[^_]*$}}
 ! NO-UNDERSCORING-NOT: comblk_
-! NO-UNDERSCORING: comblk,
+! NO-UNDERSCORING: {{comblk[^_]*$}}