diff --git a/contrib/credential/netrc/t-git-credential-netrc.sh b/contrib/credential/netrc/t-git-credential-netrc.sh
index c5661087fe..07227d0228 100755
--- a/contrib/credential/netrc/t-git-credential-netrc.sh
+++ b/contrib/credential/netrc/t-git-credential-netrc.sh
@@ -23,9 +23,10 @@
 	# The external test will outputs its own plan
 	test_external_has_tap=1
 
+	export PERL5LIB="$GITPERLLIB"
 	test_external \
 		'git-credential-netrc' \
-		perl "$TEST_DIRECTORY"/../contrib/credential/netrc/test.pl
+		perl "$GIT_BUILD_DIR"/contrib/credential/netrc/test.pl
 
 	test_done
 )
diff --git a/contrib/credential/netrc/test.pl b/contrib/credential/netrc/test.pl
index 1e1001030e..2b5280ad6a 100755
--- a/contrib/credential/netrc/test.pl
+++ b/contrib/credential/netrc/test.pl
@@ -1,5 +1,4 @@
 #!/usr/bin/perl
-use lib (split(/:/, $ENV{GITPERLLIB}));
 
 use warnings;
 use strict;