diff --git a/lib/builder.rb b/lib/builder.rb
index 20558df..2351a62 100644
--- a/lib/builder.rb
+++ b/lib/builder.rb
@@ -1,4 +1,3 @@
-#!/usr/bin/env ruby
 # frozen_string_literal: true
 
 #--
diff --git a/lib/builder/xchar.rb b/lib/builder/xchar.rb
index f904ca5..33afd72 100644
--- a/lib/builder/xchar.rb
+++ b/lib/builder/xchar.rb
@@ -1,4 +1,3 @@
-#!/usr/bin/env ruby
 # frozen_string_literal: true
 
 # The XChar library is provided courtesy of Sam Ruby (See
diff --git a/lib/builder/xmlbase.rb b/lib/builder/xmlbase.rb
index 2cddbec..a891acd 100644
--- a/lib/builder/xmlbase.rb
+++ b/lib/builder/xmlbase.rb
@@ -1,4 +1,3 @@
-#!/usr/bin/env ruby
 # frozen_string_literal: true
 
 module Builder
diff --git a/lib/builder/xmlevents.rb b/lib/builder/xmlevents.rb
index 1b62c0c..62a3d16 100644
--- a/lib/builder/xmlevents.rb
+++ b/lib/builder/xmlevents.rb
@@ -1,4 +1,3 @@
-#!/usr/bin/env ruby
 # frozen_string_literal: true
 
 #--
diff --git a/lib/builder/xmlmarkup.rb b/lib/builder/xmlmarkup.rb
index cccf8d0..9cef5eb 100644
--- a/lib/builder/xmlmarkup.rb
+++ b/lib/builder/xmlmarkup.rb
@@ -1,4 +1,3 @@
-#!/usr/bin/env ruby
 # frozen_string_literal: true
 #--
 # Copyright 2004, 2005 by Jim Weirich (jim@weirichhouse.org).
diff --git a/rakelib/tags.rake b/rakelib/tags.rake
index 2743f02..3e4d9d4 100755
--- a/rakelib/tags.rake
+++ b/rakelib/tags.rake
@@ -1,4 +1,3 @@
-#!/usr/bin/env ruby
 # frozen_string_literal: true
 
 module Tags
diff --git a/test/performance.rb b/test/performance.rb
index 71362f6..e7bd56d 100644
--- a/test/performance.rb
+++ b/test/performance.rb
@@ -1,4 +1,3 @@
-#!/usr/bin/env ruby
 # frozen_string_literal: true
 # encoding: iso-8859-1
 
diff --git a/test/test_eventbuilder.rb b/test/test_eventbuilder.rb
index 0148712..afa8c7e 100644
--- a/test/test_eventbuilder.rb
+++ b/test/test_eventbuilder.rb
@@ -1,4 +1,3 @@
-#!/usr/bin/env ruby
 # frozen_string_literal: true
 
 #--
diff --git a/test/test_markupbuilder.rb b/test/test_markupbuilder.rb
index 9e0b432..2447cf0 100644
--- a/test/test_markupbuilder.rb
+++ b/test/test_markupbuilder.rb
@@ -1,4 +1,3 @@
-#!/usr/bin/env ruby
 # frozen_string_literal: true
 
 #--
diff --git a/test/test_method_caching.rb b/test/test_method_caching.rb
index c7c8802..9244883 100644
--- a/test/test_method_caching.rb
+++ b/test/test_method_caching.rb
@@ -1,4 +1,3 @@
-#!/usr/bin/env ruby
 # frozen_string_literal: true
 
 #--
diff --git a/test/test_namecollision.rb b/test/test_namecollision.rb
index 5b24c91..8a36396 100644
--- a/test/test_namecollision.rb
+++ b/test/test_namecollision.rb
@@ -1,4 +1,3 @@
-#!/usr/bin/env ruby
 # frozen_string_literal: true
 
 #--
diff --git a/test/test_xchar.rb b/test/test_xchar.rb
index 745589b..5fb4a2b 100644
--- a/test/test_xchar.rb
+++ b/test/test_xchar.rb
@@ -1,4 +1,3 @@
-#!/usr/bin/env ruby
 # frozen_string_literal: true
 # encoding: us-ascii
 
@@ -12,7 +11,6 @@
 # above copyright notice is included.
 #++
 
-#!/usr/bin/env ruby
 
 require 'helper'
 require 'builder/xchar'