diff --git a/lib/puppet/type/yumrepo.rb b/lib/puppet/type/yumrepo.rb
index 5668697..4359f67 100644
--- a/lib/puppet/type/yumrepo.rb
+++ b/lib/puppet/type/yumrepo.rb
@@ -304,19 +304,25 @@
 
   newproperty(:proxy) do
     desc "URL of a proxy server that Yum should use when accessing this repository.
-      This attribute can also be set to `'_none_'`, which will make Yum bypass any
-      global proxy settings when accessing this repository.
+      This attribute can also be set to '_none_' (or '' for EL >= 8 only),
+      which will make Yum bypass any global proxy settings when accessing this repository.
       #{ABSENT_DOC}"
 
     newvalues(%r{.*}, :absent)
     validate do |value|
       next if value.to_s =~ %r{^(absent|_none_)$}
-      parsed = URI.parse(value)
+      next if value.to_s.empty? && Facter.value(:operatingsystemmajrelease).to_i >= 8
 
+      parsed = URI.parse(value)
       unless VALID_SCHEMES.include?(parsed.scheme)
         raise _('Must be a valid URL')
       end
     end
+
+    munge do |value|
+      return '' if Facter.value(:operatingsystemmajrelease).to_i >= 8 && value.to_s == '_none_'
+      value.to_s
+    end
   end
 
   newproperty(:proxy_username) do
diff --git a/spec/unit/type/yumrepo_spec.rb b/spec/unit/type/yumrepo_spec.rb
index 1afdea3..81dbbdb 100644
--- a/spec/unit/type/yumrepo_spec.rb
+++ b/spec/unit/type/yumrepo_spec.rb
@@ -312,13 +312,37 @@
 
     describe 'proxy' do
       it_behaves_like 'a yumrepo parameter that can be absent', :proxy
+      it_behaves_like 'a yumrepo parameter that accepts a single URL', :proxy
+
       it 'accepts _none_' do
         described_class.new(
           name: 'puppetlabs',
           proxy: '_none_',
         )
       end
-      it_behaves_like 'a yumrepo parameter that accepts a single URL', :proxy
+
+      it 'accepts an empty string' do
+        described_class.new(
+          name: 'puppetlabs',
+          proxy: '',
+        )
+      end
+
+      it 'munges \'_none_\' to empty string for EL >= 8' do
+        Facter.stubs(:value).with(:operatingsystemmajrelease).returns('8')
+        instance = described_class.new(name: 'puppetlabs', proxy: '_none_')
+        expect(instance[:proxy]).to eq ''
+      end
+
+      it 'does not munges \'_none_\' to empty string for EL < 8' do
+        Facter.stubs(:value).with(:operatingsystemmajrelease).returns('7')
+        instance = described_class.new(name: 'puppetlabs', proxy: '_none_')
+        expect(instance[:proxy]).to eq '_none_'
+      end
+
+      it 'does not raise any errors' do
+        expect { described_class.new(name: 'puppetlabs', proxy: '') }.not_to raise_error
+      end
     end
 
     describe 'proxy_username' do