diff --git a/t/autoqc_util.pm b/t/autoqc_util.pm
index ad20a362..4777c6d5 100644
--- a/t/autoqc_util.pm
+++ b/t/autoqc_util.pm
@@ -77,7 +77,7 @@ sub write_seqtk_script {
   my $fh;
   open($fh, '>', $script_path) or croak "Cannot open $script_path for writing";
 
-  print $fh '#!/usr/local/bin/bash';
+  print $fh '#!/usr/bin/env bash';
   print $fh "\n";
   print $fh '# Script to fake seqtk in testing. Automatically generated by npg at ' . time;
   print $fh "\n";
@@ -108,7 +108,7 @@ sub write_bwa_script {
   my $fh;
   open($fh, '>', $script_path) or croak "Cannot open $script_path for writing";
 
-  print $fh '#!/usr/local/bin/bash';
+  print $fh '#!/usr/bin/env bash';
   print $fh "\n";
   print $fh '# Script to fake BWA tool in testing. Automatically generated by npg at ' . time;
   print $fh "\n";