diff --git a/tests/run-regression-tests-nginx.pl b/tests/run-regression-tests-nginx.pl
index d6760620..509ef367 100755
--- a/tests/run-regression-tests-nginx.pl
+++ b/tests/run-regression-tests-nginx.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 #
 # Run regression tests.
 #