diff --git a/manifests/setup.pp b/manifests/setup.pp
index 55d7197..5a985f6 100644
--- a/manifests/setup.pp
+++ b/manifests/setup.pp
@@ -1,59 +1,67 @@
 # === Class: concat::setup
 #
 # Sets up the concat system.
 #
 # [$concatdir]
 #   is where the fragments live and is set on the fact concat_basedir.
 #   Since puppet should always manage files in $concatdir and they should
 #   not be deleted ever, /tmp is not an option.
 #
 # [$puppetversion]
 #   should be either 24 or 25 to enable a 24 compatible
 #   mode, in 24 mode you might see phantom notifies this is a side effect
 #   of the method we use to clear the fragments directory.
 #
 # The regular expression below will try to figure out your puppet version
 # but this code will only work in 0.24.8 and newer.
 #
 # It also copies out the concatfragments.sh file to ${concatdir}/bin
 #
 class concat::setup {
+  case $::osfamily {
+    'windows': {
+      fail("Unsupported osfamily: ${osfamily}")
+    }
+    default: {
+      # Should work otherwise
+    }
+  }
   $id = $::id
   $root_group = $id ? {
     root    => 0,
     default => $id
   }
 
   if $::concat_basedir {
     $concatdir = $::concat_basedir
   } else {
     fail ("\$concat_basedir not defined. Try running again with pluginsync=true on the [master] and/or [main] section of your node's '/etc/puppet/puppet.conf'.")
   }
 
   $majorversion = regsubst($::puppetversion, '^[0-9]+[.]([0-9]+)[.][0-9]+$', '\1')
   $fragments_source = $majorversion ? {
     24      => 'puppet:///concat/concatfragments.sh',
     default => 'puppet:///modules/concat/concatfragments.sh'
   }
 
   file{"${concatdir}/bin/concatfragments.sh":
     owner  => $id,
     group  => $root_group,
     mode   => '0755',
     source => $fragments_source;
 
   [ $concatdir, "${concatdir}/bin" ]:
     ensure => directory,
     owner  => $id,
     group  => $root_group,
     mode   => '0750';
 
   ## Old versions of this module used a different path.
   '/usr/local/bin/concatfragments.sh':
     ensure => absent;
   }
 
   # Ensure we run setup first.
   Class['concat::setup'] -> Concat::Fragment<| |>
 
 }
diff --git a/spec/acceptance/backup_spec.rb b/spec/acceptance/backup_spec.rb
index 764bdbb..c09c178 100644
--- a/spec/acceptance/backup_spec.rb
+++ b/spec/acceptance/backup_spec.rb
@@ -1,105 +1,105 @@
 require 'spec_helper_acceptance'
 
-describe 'concat backup parameter' do
+describe 'concat backup parameter', :unless => UNSUPPORTED_PLATFORMS.include?(fact('osfamily')) do
   basedir = default.tmpdir('concat')
   context '=> puppet' do
     before :all do
       shell("rm -rf #{basedir}")
       shell("mkdir -p #{basedir}")
       shell("echo 'old contents' > #{basedir}/file")
     end
 
     pp = <<-EOS
       include concat::setup
       concat { '#{basedir}/file':
         backup => 'puppet',
       }
       concat::fragment { 'new file':
         target  => '#{basedir}/file',
         content => 'new contents',
       }
     EOS
 
     it 'applies the manifest twice with "Filebucketed" stdout and no stderr' do
       apply_manifest(pp, :catch_failures => true) do |r|
         expect(r.stderr).to eq("")
         expect(r.stdout).to match(/Filebucketed #{basedir}\/file to puppet with sum 0140c31db86293a1a1e080ce9b91305f/) # sum is for file contents of 'old contents'
       end
       expect(apply_manifest(pp, :catch_changes => true).stderr).to eq("")
     end
 
     describe file("#{basedir}/file") do
       it { should be_file }
       it { should contain 'new contents' }
     end
   end
 
   context '=> .backup' do
     before :all do
       shell("rm -rf #{basedir}")
       shell("mkdir -p #{basedir}")
       shell("echo 'old contents' > #{basedir}/file")
     end
 
     pp = <<-EOS
       include concat::setup
       concat { '#{basedir}/file':
         backup => '.backup',
       }
       concat::fragment { 'new file':
         target  => '#{basedir}/file',
         content => 'new contents',
       }
     EOS
 
     # XXX Puppet doesn't mention anything about filebucketing with a given
     # extension like .backup
     it 'applies the manifest twice  no stderr' do
       expect(apply_manifest(pp, :catch_failures => true).stderr).to eq("")
       expect(apply_manifest(pp, :catch_changes => true).stderr).to eq("")
     end
 
     describe file("#{basedir}/file") do
       it { should be_file }
       it { should contain 'new contents' }
     end
     describe file("#{basedir}/file.backup") do
       it { should be_file }
       it { should contain 'old contents' }
     end
   end
 
   # XXX The backup parameter uses validate_string() and thus can't be the
   # boolean false value, but the string 'false' has the same effect in Puppet 3
   context "=> 'false'" do
     before :all do
       shell("rm -rf #{basedir}")
       shell("mkdir -p #{basedir}")
       shell("echo 'old contents' > #{basedir}/file")
     end
 
     pp = <<-EOS
       include concat::setup
       concat { '#{basedir}/file':
         backup => '.backup',
       }
       concat::fragment { 'new file':
         target  => '#{basedir}/file',
         content => 'new contents',
       }
     EOS
 
     it 'applies the manifest twice with no "Filebucketed" stdout and no stderr' do
       apply_manifest(pp, :catch_failures => true) do |r|
         expect(r.stderr).to eq("")
         expect(r.stdout).to_not match(/Filebucketed/)
       end
       expect(apply_manifest(pp, :catch_changes => true).stderr).to eq("")
     end
 
     describe file("#{basedir}/file") do
       it { should be_file }
       it { should contain 'new contents' }
     end
   end
 end
diff --git a/spec/acceptance/concat_spec.rb b/spec/acceptance/concat_spec.rb
index ab6788e..b4f7352 100644
--- a/spec/acceptance/concat_spec.rb
+++ b/spec/acceptance/concat_spec.rb
@@ -1,79 +1,79 @@
 require 'spec_helper_acceptance'
 
 case fact('osfamily')
 when 'AIX'
   username  = 'root'
   groupname = 'system'
 when 'windows'
   username  = 'Administrator'
   groupname = 'Administrators'
 else
   username  = 'root'
   groupname = 'root'
 end
 
-describe 'basic concat test' do
+describe 'basic concat test', :unless => UNSUPPORTED_PLATFORMS.include?(fact('osfamily')) do
   basedir = default.tmpdir('concat')
 
   shared_examples 'successfully_applied' do |pp|
     it 'applies the manifest twice with no stderr' do
       expect(apply_manifest(pp, :catch_failures => true).stderr).to eq("")
       expect(apply_manifest(pp, :catch_changes => true).stderr).to eq("")
     end
   end
 
   context 'owner/group' do
     pp = <<-EOS
       include concat::setup
       concat { '#{basedir}/file':
         owner => '#{username}',
         group => '#{groupname}',
         mode  => '0644',
       }
 
       concat::fragment { '1':
         target  => '#{basedir}/file',
         content => '1',
         order   => '01',
       }
 
       concat::fragment { '2':
         target  => '#{basedir}/file',
         content => '2',
         order   => '02',
       }
     EOS
 
     it_behaves_like 'successfully_applied', pp
 
     describe file("#{basedir}/file") do
       it { should be_file }
       it { should be_owned_by username }
       it { should be_grouped_into groupname }
       # XXX file be_mode isn't supported on AIX
-      it("should be mode 644", :unless => fact('osfamily') == "AIX") {
+      it("should be mode 644", :unless => (fact('osfamily') == "AIX" or UNSUPPORTED_PLATFORMS.include?(fact('osfamily')))) {
         should be_mode 644
       }
       it { should contain '1' }
       it { should contain '2' }
     end
     describe file("#{default.puppet['vardir']}/concat/#{basedir.gsub('/','_')}_file/fragments/01_1") do
       it { should be_file }
       it { should be_owned_by username }
       it { should be_grouped_into groupname }
       # XXX file be_mode isn't supported on AIX
-      it("should be mode 644", :unless => fact('osfamily') == "AIX") {
+      it("should be mode 644", :unless => (fact('osfamily') == "AIX" or UNSUPPORTED_PLATFORMS.include?(fact('osfamily')))) {
         should be_mode 644
       }
     end
     describe file("#{default.puppet['vardir']}/concat/#{basedir.gsub('/','_')}_file/fragments/02_2") do
       it { should be_file }
       it { should be_owned_by username }
       it { should be_grouped_into groupname }
       # XXX file be_mode isn't supported on AIX
-      it("should be mode 644", :unless => fact('osfamily') == "AIX") {
+      it("should be mode 644", :unless => (fact('osfamily') == "AIX" or UNSUPPORTED_PLATFORMS.include?(fact('osfamily')))) {
         should be_mode 644
       }
     end
   end
 end
diff --git a/spec/acceptance/empty_spec.rb b/spec/acceptance/empty_spec.rb
index ad24415..8eb0a96 100644
--- a/spec/acceptance/empty_spec.rb
+++ b/spec/acceptance/empty_spec.rb
@@ -1,24 +1,24 @@
 require 'spec_helper_acceptance'
 
-describe 'concat force empty parameter' do
+describe 'concat force empty parameter', :unless => UNSUPPORTED_PLATFORMS.include?(fact('osfamily')) do
   basedir = default.tmpdir('concat')
   context 'should run successfully' do
     pp = <<-EOS
       include concat::setup
       concat { '#{basedir}/file':
         mode  => '0644',
         force => true,
       }
     EOS
 
     it 'applies the manifest twice with no stderr' do
       expect(apply_manifest(pp, :catch_failures => true).stderr).to eq("")
       expect(apply_manifest(pp, :catch_changes => true).stderr).to eq("")
     end
 
     describe file("#{basedir}/file") do
       it { should be_file }
       it { should_not contain '1\n2' }
     end
   end
 end
diff --git a/spec/acceptance/fragment_source_spec.rb b/spec/acceptance/fragment_source_spec.rb
index d2f0c7b..3f6eb49 100644
--- a/spec/acceptance/fragment_source_spec.rb
+++ b/spec/acceptance/fragment_source_spec.rb
@@ -1,150 +1,150 @@
 require 'spec_helper_acceptance'
 
 case fact('osfamily')
 when 'AIX'
   username  = 'root'
   groupname = 'system'
 when 'windows'
   username  = 'Administrator'
   groupname = 'Administrators'
 else
   username  = 'root'
   groupname = 'root'
 end
 
-describe 'concat::fragment source' do
+describe 'concat::fragment source', :unless => UNSUPPORTED_PLATFORMS.include?(fact('osfamily')) do
   basedir = default.tmpdir('concat')
   context 'should read file fragments from local system' do
     before(:all) do
       shell("/bin/echo 'file1 contents' > #{basedir}/file1")
       shell("/bin/echo 'file2 contents' > #{basedir}/file2")
     end
 
     pp = <<-EOS
       include concat::setup
       concat { '#{basedir}/foo': }
 
       concat::fragment { '1':
         target  => '#{basedir}/foo',
         source  => '#{basedir}/file1',
       }
       concat::fragment { '2':
         target  => '#{basedir}/foo',
         content => 'string1 contents',
       }
       concat::fragment { '3':
         target  => '#{basedir}/foo',
         source  => '#{basedir}/file2',
       }
     EOS
 
     it 'applies the manifest twice with no stderr' do
       expect(apply_manifest(pp, :catch_failures => true).stderr).to eq("")
       expect(apply_manifest(pp, :catch_changes => true).stderr).to eq("")
     end
 
     describe file("#{basedir}/foo") do
       it { should be_file }
       it { should contain 'file1 contents' }
       it { should contain 'string1 contents' }
       it { should contain 'file2 contents' }
     end
   end # should read file fragments from local system
 
   context 'should create files containing first match only.' do
     before(:all) do
       shell("rm -rf #{basedir} #{default.puppet['vardir']}/concat")
       shell("mkdir -p #{basedir}")
       shell("echo 'file1 contents' > #{basedir}/file1")
       shell("echo 'file2 contents' > #{basedir}/file2")
     end
 
     pp = <<-EOS
       include concat::setup
       concat { '#{basedir}/result_file1':
         owner   => '#{username}',
         group   => '#{groupname}',
         mode    => '0644',
       }
       concat { '#{basedir}/result_file2':
         owner   => '#{username}',
         group   => '#{groupname}',
         mode    => '0644',
       }
       concat { '#{basedir}/result_file3':
         owner   => '#{username}',
         group   => '#{groupname}',
         mode    => '0644',
       }
 
       concat::fragment { '1':
         target  => '#{basedir}/result_file1',
         source => [ '#{basedir}/file1', '#{basedir}/file2' ],
         order   => '01',
       }
       concat::fragment { '2':
         target  => '#{basedir}/result_file2',
         source => [ '#{basedir}/file2', '#{basedir}/file1' ],
         order   => '01',
       }
       concat::fragment { '3':
         target  => '#{basedir}/result_file3',
         source => [ '#{basedir}/file1', '#{basedir}/file2' ],
         order   => '01',
       }
     EOS
 
     it 'applies the manifest twice with no stderr' do
       expect(apply_manifest(pp, :catch_failures => true).stderr).to eq("")
       expect(apply_manifest(pp, :catch_changes => true).stderr).to eq("")
     end
     describe file("#{basedir}/result_file1") do
       it { should be_file }
       it { should contain 'file1 contents' }
       it { should_not contain 'file2 contents' }
     end
     describe file("#{basedir}/result_file2") do
       it { should be_file }
       it { should contain 'file2 contents' }
       it { should_not contain 'file1 contents' }
     end
     describe file("#{basedir}/result_file3") do
       it { should be_file }
       it { should contain 'file1 contents' }
       it { should_not contain 'file2 contents' }
     end
   end
 
   context 'should fail if no match on source.' do
     before(:all) do
       shell("rm -rf #{basedir} #{default.puppet['vardir']}/concat")
       shell("mkdir -p #{basedir}")
       shell("rm -rf #{basedir}/fail_no_source #{basedir}/nofilehere #{basedir}/nothereeither")
     end
 
     pp = <<-EOS
       include concat::setup
       concat { '#{basedir}/fail_no_source':
         owner   => '#{username}',
         group   => '#{groupname}',
         mode    => '0644',
       }
 
       concat::fragment { '1':
         target  => '#{basedir}/fail_no_source',
         source => [ '#{basedir}/nofilehere', '#{basedir}/nothereeither' ],
         order   => '01',
       }
     EOS
 
     it 'applies the manifest with resource failures' do
       apply_manifest(pp, :expect_failures => true)
     end
     describe file("#{basedir}/fail_no_source") do
       #FIXME: Serverspec::Type::File doesn't support exists? for some reason. so... hack.
       it { should_not be_file }
       it { should_not be_directory }
     end
   end
 end
 
diff --git a/spec/acceptance/newline_spec.rb b/spec/acceptance/newline_spec.rb
index a511e3f..fb3f17d 100644
--- a/spec/acceptance/newline_spec.rb
+++ b/spec/acceptance/newline_spec.rb
@@ -1,60 +1,60 @@
 require 'spec_helper_acceptance'
 
-describe 'concat ensure_newline parameter' do
+describe 'concat ensure_newline parameter', :unless => UNSUPPORTED_PLATFORMS.include?(fact('osfamily')) do
   basedir = default.tmpdir('concat')
   context '=> false' do
     pp = <<-EOS
       include concat::setup
       concat { '#{basedir}/file':
         ensure_newline => false,
       }
       concat::fragment { '1':
         target  => '#{basedir}/file',
         content => '1',
       }
       concat::fragment { '2':
         target  => '#{basedir}/file',
         content => '2',
       }
     EOS
 
     it 'applies the manifest twice with no stderr' do
       expect(apply_manifest(pp, :catch_failures => true).stderr).to eq("")
       expect(apply_manifest(pp, :catch_changes => true).stderr).to eq("")
     end
 
     describe file("#{basedir}/file") do
       it { should be_file }
       it { should contain '12' }
     end
   end
 
   #context '=> true' do
   #  pp = <<-EOS
   #    include concat::setup
   #    concat { '#{basedir}/file':
   #      ensure_newline => true,
   #    }
   #    concat::fragment { '1':
   #      target  => '#{basedir}/file',
   #      content => '1',
   #    }
   #    concat::fragment { '2':
   #      target  => '#{basedir}/file',
   #      content => '2',
   #    }
   #  EOS
 
   #  it 'applies the manifest twice with no stderr' do
   #    expect(apply_manifest(pp, :catch_failures => true).stderr).to eq("")
   #    expect(apply_manifest(pp, :catch_changes  => true).stderr).to eq("")
   #    #XXX ensure_newline => true causes changes on every run because the files
   #    #are modified in place.
   #  end
 
   #  describe file("#{basedir}/file") do
   #    it { should be_file }
   #    it { should contain "1\n2\n" }
   #  end
   #end
 end
diff --git a/spec/acceptance/order_spec.rb b/spec/acceptance/order_spec.rb
index 32f85d5..1c79ab4 100644
--- a/spec/acceptance/order_spec.rb
+++ b/spec/acceptance/order_spec.rb
@@ -1,155 +1,155 @@
 require 'spec_helper_acceptance'
 
-describe 'concat order' do
+describe 'concat order', :unless => UNSUPPORTED_PLATFORMS.include?(fact('osfamily')) do
   basedir = default.tmpdir('concat')
   before(:all) do
     shell("rm -rf #{basedir} #{default.puppet['vardir']}/concat")
     shell("mkdir -p #{basedir}")
   end
 
   context '=> alpha' do
     pp = <<-EOS
       include concat::setup
       concat { '#{basedir}/foo':
         order => 'alpha'
       }
       concat::fragment { '1':
         target  => '#{basedir}/foo',
         content => 'string1',
       }
       concat::fragment { '2':
         target  => '#{basedir}/foo',
         content => 'string2',
       }
       concat::fragment { '10':
         target  => '#{basedir}/foo',
         content => 'string10',
       }
     EOS
 
     it 'applies the manifest twice with no stderr' do
       expect(apply_manifest(pp, :catch_failures => true).stderr).to eq("")
       expect(apply_manifest(pp, :catch_changes => true).stderr).to eq("")
     end
 
     describe file("#{basedir}/foo") do
       it { should be_file }
       #XXX Solaris 10 doesn't support multi-line grep
-      it("should contain string10\nstring1\nsring2", :unless => fact('osfamily') == 'Solaris') {
+      it("should contain string10\nstring1\nsring2", :unless => (fact('osfamily') == 'Solaris' or UNSUPPORTED_PLATFORMS.include?(fact('osfamily')))) {
         should contain "string10\nstring1\nsring2"
       }
     end
   end
 
   context '=> numeric' do
     pp = <<-EOS
       include concat::setup
       concat { '#{basedir}/foo':
         order => 'numeric'
       }
       concat::fragment { '1':
         target  => '#{basedir}/foo',
         content => 'string1',
       }
       concat::fragment { '2':
         target  => '#{basedir}/foo',
         content => 'string2',
       }
       concat::fragment { '10':
         target  => '#{basedir}/foo',
         content => 'string10',
       }
     EOS
 
     it 'applies the manifest twice with no stderr' do
       expect(apply_manifest(pp, :catch_failures => true).stderr).to eq("")
       expect(apply_manifest(pp, :catch_changes => true).stderr).to eq("")
     end
 
     describe file("#{basedir}/foo") do
       it { should be_file }
       #XXX Solaris 10 doesn't support multi-line grep
-      it("should contain string1\nstring2\nsring10", :unless => fact('osfamily') == 'Solaris') {
+      it("should contain string1\nstring2\nsring10", :unless => (fact('osfamily') == 'Solaris' or UNSUPPORTED_PLATFORMS.include?(fact('osfamily')))) {
         should contain "string1\nstring2\nsring10"
       }
     end
   end
 end # concat order
 
-describe 'concat::fragment order' do
+describe 'concat::fragment order', :unless => UNSUPPORTED_PLATFORMS.include?(fact('osfamily')) do
   basedir = default.tmpdir('concat')
   before(:all) do
     shell("rm -rf #{basedir} #{default.puppet['vardir']}/concat")
     shell("mkdir -p #{basedir}")
   end
 
   context '=> reverse order' do
     pp = <<-EOS
       include concat::setup
       concat { '#{basedir}/foo': }
       concat::fragment { '1':
         target  => '#{basedir}/foo',
         content => 'string1',
         order   => '15',
       }
       concat::fragment { '2':
         target  => '#{basedir}/foo',
         content => 'string2',
         # default order 10
       }
       concat::fragment { '3':
         target  => '#{basedir}/foo',
         content => 'string3',
         order   => '1',
       }
     EOS
 
     it 'applies the manifest twice with no stderr' do
       expect(apply_manifest(pp, :catch_failures => true).stderr).to eq("")
       expect(apply_manifest(pp, :catch_changes => true).stderr).to eq("")
     end
 
     describe file("#{basedir}/foo") do
       it { should be_file }
       #XXX Solaris 10 doesn't support multi-line grep
-      it("should contain string3\nstring2\nsring1", :unless => fact('osfamily') == 'Solaris') {
+      it("should contain string3\nstring2\nsring1", :unless => (fact('osfamily') == 'Solaris' or UNSUPPORTED_PLATFORMS.include?(fact('osfamily')))) {
         should contain "string3\nstring2\nsring1"
       }
     end
   end
 
   context '=> normal order' do
     pp = <<-EOS
       include concat::setup
       concat { '#{basedir}/foo': }
       concat::fragment { '1':
         target  => '#{basedir}/foo',
         content => 'string1',
         order   => '01',
       }
       concat::fragment { '2':
         target  => '#{basedir}/foo',
         content => 'string2',
         order   => '02'
       }
       concat::fragment { '3':
         target  => '#{basedir}/foo',
         content => 'string3',
         order   => '03',
       }
     EOS
 
     it 'applies the manifest twice with no stderr' do
       expect(apply_manifest(pp, :catch_failures => true).stderr).to eq("")
       expect(apply_manifest(pp, :catch_changes => true).stderr).to eq("")
     end
 
     describe file("#{basedir}/foo") do
       it { should be_file }
       #XXX Solaris 10 doesn't support multi-line grep
-      it("should contain string1\nstring2\nsring3", :unless => fact('osfamily') == 'Solaris') {
+      it("should contain string1\nstring2\nsring3", :unless => (fact('osfamily') == 'Solaris' or UNSUPPORTED_PLATFORMS.include?(fact('osfamily')))) {
         should contain "string1\nstring2\nsring3"
       }
     end
   end
 end # concat::fragment order
diff --git a/spec/acceptance/replace_spec.rb b/spec/acceptance/replace_spec.rb
index dfc05fe..e84140f 100644
--- a/spec/acceptance/replace_spec.rb
+++ b/spec/acceptance/replace_spec.rb
@@ -1,249 +1,249 @@
 require 'spec_helper_acceptance'
 
-describe 'replacement of' do
+describe 'replacement of', :unless => UNSUPPORTED_PLATFORMS.include?(fact('osfamily')) do
   basedir = default.tmpdir('concat')
   context 'file' do
     context 'should not succeed' do
       before(:all) do
         shell("mkdir -p #{basedir}")
         shell("echo 'file exists' > #{basedir}/file")
       end
       after(:all) do
         shell("rm -rf #{basedir} #{default.puppet['vardir']}/concat")
       end
 
       pp = <<-EOS
         include concat::setup
         concat { '#{basedir}/file':
           replace => false,
         }
 
         concat::fragment { '1':
           target  => '#{basedir}/file',
           content => '1',
         }
 
         concat::fragment { '2':
           target  => '#{basedir}/file',
           content => '2',
         }
       EOS
 
       it 'applies the manifest twice with no stderr' do
         expect(apply_manifest(pp, :catch_failures => true).stderr).to eq("")
         expect(apply_manifest(pp, :catch_changes => true).stderr).to eq("")
       end
 
       describe file("#{basedir}/file") do
         it { should be_file }
         it { should contain 'file exists' }
         it { should_not contain '1' }
         it { should_not contain '2' }
       end
     end
 
     context 'should succeed' do
       before(:all) do
         shell("mkdir -p #{basedir}")
         shell("echo 'file exists' > #{basedir}/file")
       end
       after(:all) do
         shell("rm -rf #{basedir} #{default.puppet['vardir']}/concat")
       end
 
       pp = <<-EOS
         include concat::setup
         concat { '#{basedir}/file':
           replace => true,
         }
 
         concat::fragment { '1':
           target  => '#{basedir}/file',
           content => '1',
         }
 
         concat::fragment { '2':
           target  => '#{basedir}/file',
           content => '2',
         }
       EOS
 
       it 'applies the manifest twice with no stderr' do
         expect(apply_manifest(pp, :catch_failures => true).stderr).to eq("")
         expect(apply_manifest(pp, :catch_changes => true).stderr).to eq("")
       end
 
       describe file("#{basedir}/file") do
         it { should be_file }
         it { should_not contain 'file exists' }
         it { should contain '1' }
         it { should contain '2' }
       end
     end
   end # file
 
   context 'symlink' do
     context 'should not succeed' do
       # XXX the core puppet file type will replace a symlink with a plain file
       # when using ensure => present and source => ... but it will not when using
       # ensure => present and content => ...; this is somewhat confusing behavior
       before(:all) do
         shell("mkdir -p #{basedir}")
         shell("ln -s #{basedir}/dangling #{basedir}/file")
       end
       after(:all) do
         shell("rm -rf #{basedir} #{default.puppet['vardir']}/concat")
       end
 
       pp = <<-EOS
         include concat::setup
         concat { '#{basedir}/file':
           replace => false,
         }
 
         concat::fragment { '1':
           target  => '#{basedir}/file',
           content => '1',
         }
 
         concat::fragment { '2':
           target  => '#{basedir}/file',
           content => '2',
         }
       EOS
 
       it 'applies the manifest twice with no stderr' do
         expect(apply_manifest(pp, :catch_failures => true).stderr).to eq("")
         expect(apply_manifest(pp, :catch_changes => true).stderr).to eq("")
       end
 
       # XXX specinfra doesn't support be_linked_to on AIX
-      describe file("#{basedir}/file"), :unless => fact("osfamily") == "AIX" do
+      describe file("#{basedir}/file"), :unless => (fact("osfamily") == "AIX" or UNSUPPORTED_PLATFORMS.include?(fact('osfamily'))) do
         it { should be_linked_to "#{basedir}/dangling" }
       end
 
       describe file("#{basedir}/dangling") do
         # XXX serverspec does not have a matcher for 'exists'
         it { should_not be_file }
         it { should_not be_directory }
       end
     end
 
     context 'should succeed' do
       # XXX the core puppet file type will replace a symlink with a plain file
       # when using ensure => present and source => ... but it will not when using
       # ensure => present and content => ...; this is somewhat confusing behavior
       before(:all) do
         shell("mkdir -p #{basedir}")
         shell("ln -s #{basedir}/dangling #{basedir}/file")
       end
       after(:all) do
         shell("rm -rf #{basedir} #{default.puppet['vardir']}/concat")
       end
 
       pp = <<-EOS
         include concat::setup
         concat { '#{basedir}/file':
           replace => true,
         }
 
         concat::fragment { '1':
           target  => '#{basedir}/file',
           content => '1',
         }
 
         concat::fragment { '2':
           target  => '#{basedir}/file',
           content => '2',
         }
       EOS
 
       it 'applies the manifest twice with no stderr' do
         expect(apply_manifest(pp, :catch_failures => true).stderr).to eq("")
         expect(apply_manifest(pp, :catch_changes => true).stderr).to eq("")
       end
 
       describe file("#{basedir}/file") do
         it { should be_file }
         it { should contain '1' }
         it { should contain '2' }
       end
     end
   end # symlink
 
   context 'directory' do
     context 'should not succeed' do
       before(:all) do
         shell("mkdir -p #{basedir}/file")
       end
       after(:all) do
         shell("rm -rf #{basedir} #{default.puppet['vardir']}/concat")
       end
 
       pp = <<-EOS
         include concat::setup
         concat { '#{basedir}/file': }
 
         concat::fragment { '1':
           target  => '#{basedir}/file',
           content => '1',
         }
 
         concat::fragment { '2':
           target  => '#{basedir}/file',
           content => '2',
         }
       EOS
 
       it 'applies the manifest twice with stderr for changing to file' do
         expect(apply_manifest(pp, :expect_failures => true).stderr).to match(/change from directory to file failed/)
         expect(apply_manifest(pp, :expect_failures => true).stderr).to match(/change from directory to file failed/)
       end
 
       describe file("#{basedir}/file") do
         it { should be_directory }
       end
     end
 
     # XXX concat's force param currently enables the creation of empty files
     # when there are no fragments, and the replace param will only replace
     # files and symlinks, not directories.  The semantics either need to be
     # changed, extended, or a new param introduced to control directory
     # replacement.
     context 'should succeed', :pending => 'not yet implemented' do
       before(:all) do
         shell("mkdir -p #{basedir}/file")
       end
       after(:all) do
         shell("rm -rf #{basedir} #{default.puppet['vardir']}/concat")
       end
 
       pp = <<-EOS
         include concat::setup
         concat { '#{basedir}/file':
           force => true,
         }
 
         concat::fragment { '1':
           target  => '#{basedir}/file',
           content => '1',
         }
 
         concat::fragment { '2':
           target  => '#{basedir}/file',
           content => '2',
         }
       EOS
 
       it 'applies the manifest twice with no stderr' do
         expect(apply_manifest(pp, :catch_failures => true).stderr).to eq("")
         expect(apply_manifest(pp, :catch_changes => true).stderr).to eq("")
       end
 
       describe file("#{basedir}/file") do
         it { should be_file }
         it { should contain '1' }
       end
     end
   end # directory
 end
diff --git a/spec/acceptance/symbolic_name_spec.rb b/spec/acceptance/symbolic_name_spec.rb
index 384a821..57a9e95 100644
--- a/spec/acceptance/symbolic_name_spec.rb
+++ b/spec/acceptance/symbolic_name_spec.rb
@@ -1,34 +1,34 @@
 require 'spec_helper_acceptance'
 
-describe 'symbolic name' do
+describe 'symbolic name', :unless => UNSUPPORTED_PLATFORMS.include?(fact('osfamily')) do
   basedir = default.tmpdir('concat')
   pp = <<-EOS
     include concat::setup
     concat { 'not_abs_path':
       path => '#{basedir}/file',
     }
 
     concat::fragment { '1':
       target  => 'not_abs_path',
       content => '1',
       order   => '01',
     }
 
     concat::fragment { '2':
       target  => 'not_abs_path',
       content => '2',
       order   => '02',
     }
   EOS
 
   it 'applies the manifest twice with no stderr' do
     expect(apply_manifest(pp, :catch_failures => true).stderr).to eq("")
     expect(apply_manifest(pp, :catch_changes => true).stderr).to eq("")
   end
 
   describe file("#{basedir}/file") do
     it { should be_file }
     it { should contain '1' }
     it { should contain '2' }
   end
 end
diff --git a/spec/acceptance/unsupported_spec.rb b/spec/acceptance/unsupported_spec.rb
new file mode 100644
index 0000000..9df7d88
--- /dev/null
+++ b/spec/acceptance/unsupported_spec.rb
@@ -0,0 +1,18 @@
+require 'spec_helper_acceptance'
+
+describe 'unsupported distributions and OSes', :if => UNSUPPORTED_PLATFORMS.include?(fact('osfamily')) do
+  basedir = default.tmpdir('concat')
+  it 'should fail' do
+    pp = <<-EOS
+      include concat::setup
+      concat { '#{basedir}/file':
+        backup => 'puppet',
+      }
+      concat::fragment { 'new file':
+        target  => '#{basedir}/file',
+        content => 'new contents',
+      }
+    EOS
+    expect(apply_manifest(pp, :expect_failures => true).stderr).to match(/unsupported/i)
+  end
+end
diff --git a/spec/acceptance/warn_spec.rb b/spec/acceptance/warn_spec.rb
index 68758fe..b036884 100644
--- a/spec/acceptance/warn_spec.rb
+++ b/spec/acceptance/warn_spec.rb
@@ -1,101 +1,101 @@
 require 'spec_helper_acceptance'
 
-describe 'concat warn =>' do
+describe 'concat warn =>', :unless => UNSUPPORTED_PLATFORMS.include?(fact('osfamily')) do
   basedir = default.tmpdir('concat')
   context 'true should enable default warning message' do
     pp = <<-EOS
       include concat::setup
       concat { '#{basedir}/file':
         warn  => true,
       }
 
       concat::fragment { '1':
         target  => '#{basedir}/file',
         content => '1',
         order   => '01',
       }
 
       concat::fragment { '2':
         target  => '#{basedir}/file',
         content => '2',
         order   => '02',
       }
     EOS
 
     it 'applies the manifest twice with no stderr' do
       expect(apply_manifest(pp, :catch_failures => true).stderr).to eq("")
       expect(apply_manifest(pp, :catch_changes => true).stderr).to eq("")
     end
 
     describe file("#{basedir}/file") do
       it { should be_file }
       it { should contain '# This file is managed by Puppet. DO NOT EDIT.' }
       it { should contain '1' }
       it { should contain '2' }
     end
   end
   context 'false should not enable default warning message' do
     pp = <<-EOS
       include concat::setup
       concat { '#{basedir}/file':
         warn  => false,
       }
 
       concat::fragment { '1':
         target  => '#{basedir}/file',
         content => '1',
         order   => '01',
       }
 
       concat::fragment { '2':
         target  => '#{basedir}/file',
         content => '2',
         order   => '02',
       }
     EOS
 
     it 'applies the manifest twice with no stderr' do
       expect(apply_manifest(pp, :catch_failures => true).stderr).to eq("")
       expect(apply_manifest(pp, :catch_changes => true).stderr).to eq("")
     end
 
     describe file("#{basedir}/file") do
       it { should be_file }
       it { should_not contain '# This file is managed by Puppet. DO NOT EDIT.' }
       it { should contain '1' }
       it { should contain '2' }
     end
   end
   context '# foo should overide default warning message' do
     pp = <<-EOS
       include concat::setup
       concat { '#{basedir}/file':
         warn  => '# foo',
       }
 
       concat::fragment { '1':
         target  => '#{basedir}/file',
         content => '1',
         order   => '01',
       }
 
       concat::fragment { '2':
         target  => '#{basedir}/file',
         content => '2',
         order   => '02',
       }
     EOS
 
     it 'applies the manifest twice with no stderr' do
       expect(apply_manifest(pp, :catch_failures => true).stderr).to eq("")
       expect(apply_manifest(pp, :catch_changes => true).stderr).to eq("")
     end
 
     describe file("#{basedir}/file") do
       it { should be_file }
       it { should contain '# foo' }
       it { should contain '1' }
       it { should contain '2' }
     end
   end
 end
diff --git a/spec/spec_helper_acceptance.rb b/spec/spec_helper_acceptance.rb
index 35dacd1..c75a7fb 100644
--- a/spec/spec_helper_acceptance.rb
+++ b/spec/spec_helper_acceptance.rb
@@ -1,44 +1,46 @@
 require 'beaker-rspec/spec_helper'
 require 'beaker-rspec/helpers/serverspec'
 
 unless ENV['RS_PROVISION'] == 'no'
   hosts.each do |host|
     if host['platform'] =~ /debian/
       on host, 'echo \'export PATH=/var/lib/gems/1.8/bin/:${PATH}\' >> ~/.bashrc'
     end
     if host.is_pe?
       install_pe
     else
       # Install Puppet
       install_package host, 'rubygems'
       on host, 'gem install puppet --no-ri --no-rdoc'
       on host, "mkdir -p #{host['distmoduledir']}"
     end
   end
 end
 
+UNSUPPORTED_PLATFORMS = ['windows']
+
 RSpec.configure do |c|
   # Project root
   proj_root = File.expand_path(File.join(File.dirname(__FILE__), '..'))
 
   # Readable test descriptions
   c.formatter = :documentation
 
   # Configure all nodes in nodeset
   c.before :suite do
     # Install module and dependencies
     puppet_module_install(:source => proj_root, :module_name => 'concat')
     hosts.each do |host|
       on host, puppet('module','install','puppetlabs-stdlib'), { :acceptable_exit_codes => [0,1] }
     end
   end
 
   c.before(:all) do
     shell('mkdir -p /tmp/concat')
   end
   c.after(:all) do
     shell("rm -rf /tmp/concat #{default.puppet['vardir']}/concat")
   end
 
   c.treat_symbols_as_metadata_keys_with_true_values = true
 end