diff --git a/dev-ruby/facter/facter-4.10.0-r1.ebuild b/dev-ruby/facter/facter-4.10.0-r1.ebuild
index 400406dfd732b..819068b56860b 100644
--- a/dev-ruby/facter/facter-4.10.0-r1.ebuild
+++ b/dev-ruby/facter/facter-4.10.0-r1.ebuild
@@ -2,7 +2,7 @@
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
-USE_RUBY="ruby32 ruby33"
+USE_RUBY="ruby32 ruby33 ruby34 ruby40"
 RUBY_FAKEGEM_GEMSPEC="facter.gemspec"
 RUBY_FAKEGEM_RECIPE_TEST="rspec3"
 RUBY_FAKEGEM_RECIPE_DOC="yard"
@@ -33,6 +33,7 @@ ruby_add_bdepend "test? ( dev-ruby/simplecov dev-ruby/timecop dev-ruby/webmock )
 PATCHES=(
 	"${FILESDIR}"/facter-4.7.0-gentoo-thor-gemspec.patch
 	"${FILESDIR}"/facter-4.10.0-gentoo-os-release.patch
+	"${FILESDIR}"/facter-4.10.0-ruby34.patch
 )
 
 src_unpack() {
diff --git a/dev-ruby/facter/files/facter-4.10.0-ruby34.patch b/dev-ruby/facter/files/facter-4.10.0-ruby34.patch
new file mode 100644
index 0000000000000..5946e5cb34f2b
--- /dev/null
+++ b/dev-ruby/facter/files/facter-4.10.0-ruby34.patch
@@ -0,0 +1,45 @@
+--- a/spec/facter/facter_spec.rb
++++ b/spec/facter/facter_spec.rb
+@@ -598,7 +598,12 @@ describe Facter do
+       context 'when exception and message are hashes' do
+         let(:message) { { 'a': 1 } }
+         let(:exception) { { 'b': 2 } }
+-        let(:expected_message) { '{:a=>1}' }
++        # https://bugs.ruby-lang.org/issues/20433
++        if RUBY_VERSION >= '3.4'
++          let(:expected_message) { '{a: 1}' }
++        else
++          let(:expected_message) { '{:a=>1}' }
++        end
+ 
+         it_behaves_like 'when exception param is not an exception'
+       end
+@@ -682,7 +687,12 @@ describe Facter do
+       context 'when exception and message are hashes' do
+         let(:message) { { 'a': 1 } }
+         let(:exception) { { 'b': 2 } }
+-        let(:expected_message) { '{:a=>1}' }
++        # https://bugs.ruby-lang.org/issues/20433
++        if RUBY_VERSION >= '3.4'
++          let(:expected_message) { '{a: 1}' }
++        else
++          let(:expected_message) { '{:a=>1}' }
++        end
+ 
+         it_behaves_like 'when exception param is not an exception'
+       end
+@@ -808,7 +818,12 @@ describe Facter do
+     end
+ 
+     it 'when message is a hash' do
+-      expect(logger).to receive(:warn).with('{:warn=>"message"}')
++      # https://bugs.ruby-lang.org/issues/20433
++      if RUBY_VERSION >= '3.4'
++        expect(logger).to receive(:warn).with('{warn: "message"}')
++      else
++        expect(logger).to receive(:warn).with('{:warn=>"message"}')
++      end
+ 
+       Facter.warn({ warn: 'message' })
+     end
+