1 files changed, 1 insertions, 1 deletions
diff --git a/t/io/dup.t b/t/io/dup.t
index 1328aebcd4..8a8b27eabd 100644
--- a/t/io/dup.t
+++ b/t/io/dup.t
@@ -2,8 +2,8 @@
 
 BEGIN {
     chdir 't' if -d 't';
-    @INC = qw(. ../lib);
     require "./test.pl";
+    set_up_inc(qw(. ../lib));
 }
 
 use Config;