diff -up PerlIO-buffersize-0.002/Build.PL.orig PerlIO-buffersize-0.002/Build.PL
--- PerlIO-buffersize-0.002/Build.PL.orig	2019-09-06 09:45:40.334833418 +0200
+++ PerlIO-buffersize-0.002/Build.PL	2019-09-06 09:46:57.828209536 +0200
@@ -29,7 +29,6 @@ my %module_build_args = (
     "warnings" => 0
   },
   "test_requires" => {
-    "PerlIO::Layers" => 0,
     "Test::Exception" => 0,
     "Test::More" => 0
   }
@@ -38,7 +37,6 @@ my %module_build_args = (
 
 my %fallback_build_requires = (
   "Module::Build" => "0.28",
-  "PerlIO::Layers" => 0,
   "Test::Exception" => 0,
   "Test::More" => 0
 );
diff -up PerlIO-buffersize-0.002/META.json.orig PerlIO-buffersize-0.002/META.json
--- PerlIO-buffersize-0.002/META.json.orig	2019-09-06 09:45:55.180097040 +0200
+++ PerlIO-buffersize-0.002/META.json	2019-09-06 09:47:31.509807624 +0200
@@ -42,7 +42,6 @@
       },
       "test" : {
          "requires" : {
-            "PerlIO::Layers" : "0",
             "Test::Exception" : "0",
             "Test::More" : "0"
          }
diff -up PerlIO-buffersize-0.002/META.yml.orig PerlIO-buffersize-0.002/META.yml
--- PerlIO-buffersize-0.002/META.yml.orig	2019-09-06 09:46:14.398438310 +0200
+++ PerlIO-buffersize-0.002/META.yml	2019-09-06 09:47:43.688023777 +0200
@@ -4,7 +4,6 @@ author:
   - 'Leon Timmermans <leont@cpan.org>'
 build_requires:
   Module::Build: '0.28'
-  PerlIO::Layers: '0'
   Test::Exception: '0'
   Test::More: '0'
 configure_requires:
diff -up PerlIO-buffersize-0.002/t/10-basics.t.orig PerlIO-buffersize-0.002/t/10-basics.t
--- PerlIO-buffersize-0.002/t/10-basics.t.orig	2019-09-06 09:45:13.356354340 +0200
+++ PerlIO-buffersize-0.002/t/10-basics.t	2019-09-06 09:46:34.918802711 +0200
@@ -4,7 +4,6 @@ use strict;
 use warnings FATAL => 'all';
 use Test::More;
 use Test::Exception;
-use PerlIO::Layers qw/query_handle/;
 
 my $fh;
 lives_ok { open $fh, '<:buffersize(256)', $0; } 'Can open :buffersize(256)';