make testsuite somewhat location independent

p4raw-id: //depot/perl@2891

1 files changed, 1 insertions, 1 deletions

diff --git a/t/io/fs.t b/t/io/fs.t
index f09d66c39e..04f5dbc6d1 100755
--- a/t/io/fs.t
+++ b/t/io/fs.t
@@ -4,7 +4,7 @@
 
 BEGIN {
     chdir 't' if -d 't';
-    @INC = '../lib';
+    unshift @INC, '../lib';
 }
 
 use Config;