diff --git a/tests/units/test_lib.rb b/tests/units/test_lib.rb
index 92ec2acc..71acd21e 100644
--- a/tests/units/test_lib.rb
+++ b/tests/units/test_lib.rb
@@ -1,6 +1,7 @@
 #!/usr/bin/env ruby
 
 require File.dirname(__FILE__) + '/../test_helper'
+require "fileutils"
 
 # tests all the low level git communication
 #
@@ -52,13 +53,12 @@ def test_commit_with_no_verify
 
     # Adds a pre-commit file that should throw an error
     create_file(pre_commit_path, <<~PRE_COMMIT_SCRIPT)
-      #!/bin/bash
+      #!/bin/sh
       echo "pre-commit script exits with an error"
       exit 1
     PRE_COMMIT_SCRIPT
 
-    create_file(pre_commit_path, 'echo Pre-commit file. Shoud not execute; exit 1') # Error when executed
-    File.chmod(0111, pre_commit_path)
+    FileUtils.chmod("+x", pre_commit_path)
 
     create_file("#{@wdir}/test_file_2", 'content test_file_2')
     @lib.add('test_file_2')