1 files changed, 2 insertions, 0 deletions
diff --git a/t/lib/TieOut.pm b/t/lib/TieOut.pm
index e41b602286..0a0f5f9cfe 100644
--- a/t/lib/TieOut.pm
+++ b/t/lib/TieOut.pm
@@ -16,6 +16,8 @@ sub PRINTF {
     $$self .= sprintf $fmt, @_;
 }
 
+sub FILENO {}
+
 sub read {
     my $self = shift;
     my $data = $$self;