diff --git a/gcc/testsuite/gcc.dg/attr-flatten-1.c b/gcc/testsuite/gcc.dg/attr-flatten-1.c
index ecb08fcd2ad..68a194cc527 100644
--- a/gcc/testsuite/gcc.dg/attr-flatten-1.c
+++ b/gcc/testsuite/gcc.dg/attr-flatten-1.c
@@ -10,9 +10,20 @@ int fn1(int p1)
 }
 __attribute__((flatten))
 __attribute__((alias("fn1")))
-int fn4(int p1); /* { dg-warning "ignored" } */
+int fn4(int p1);
+
+/* Again, but this time the target doesn't have the attribute.  */
+int fn1a(int p1)
+{
+  int a = fn2(p1);
+  return fn3(a);
+}
+__attribute__((flatten))
+__attribute__((alias("fn1a")))
+int fn4a(int p1); /* { dg-warning "ignored" } */
+
 int
 test ()
 {
-  return fn4(1);
+  return fn4(1)+fn4a(1);
 }