diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index f593c1d1..2383d198 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -3,14 +3,14 @@ on:
   - push
   - pull_request
 jobs:
-  ruby-versions-inplace:
+  ruby-versions:
     uses: ruby/actions/.github/workflows/ruby_versions.yml@master
     with:
       engine: cruby-jruby
       min_version: 2.5
 
   inplace:
-    needs: ruby-versions-inplace
+    needs: ruby-versions
     name: "Inplace: ${{ matrix.ruby-version }} on ${{ matrix.runs-on }}"
     runs-on: ${{ matrix.runs-on }}
     strategy:
@@ -20,7 +20,7 @@ jobs:
           - ubuntu-latest
           - macos-latest
           - windows-latest
-        ruby-version: ${{ fromJson(needs.ruby-versions-inplace.outputs.versions) }}
+        ruby-version: ${{ fromJson(needs.ruby-versions.outputs.versions) }}
         exclude:
           - {runs-on: macos-latest, ruby-version: 2.5}
         # include:
@@ -47,14 +47,8 @@ jobs:
       - name: Test
         run: bundle exec rake test RUBYOPT="--enable-frozen-string-literal"
 
-  ruby-versions-gem:
-    uses: ruby/actions/.github/workflows/ruby_versions.yml@master
-    with:
-      engine: cruby-jruby
-      min_version: 3.0
-
   gem:
-    needs: ruby-versions-gem
+    needs: ruby-versions
     name: "Gem: ${{ matrix.ruby-version }} on ${{ matrix.runs-on }}"
     runs-on: ${{ matrix.runs-on }}
     strategy:
@@ -64,7 +58,9 @@ jobs:
           - ubuntu-latest
           - macos-latest
           - windows-latest
-        ruby-version: ${{ fromJson(needs.ruby-versions-gem.outputs.versions) }}
+        exclude:
+          - {runs-on: macos-latest, ruby-version: 2.5}
+        ruby-version: ${{ fromJson(needs.ruby-versions.outputs.versions) }}
     steps:
       - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
diff --git a/lib/rexml/source.rb b/lib/rexml/source.rb
index 982aa84a..67154832 100644
--- a/lib/rexml/source.rb
+++ b/lib/rexml/source.rb
@@ -1,8 +1,28 @@
 # coding: US-ASCII
 # frozen_string_literal: false
+
+require "strscan"
+
 require_relative 'encoding'
 
 module REXML
+  if StringScanner::Version < "1.0.0"
+    module StringScannerCheckScanString
+      refine StringScanner do
+        def check(pattern)
+          pattern = /#{Regexp.escape(pattern)}/ if pattern.is_a?(String)
+          super(pattern)
+        end
+
+        def scan(pattern)
+          pattern = /#{Regexp.escape(pattern)}/ if pattern.is_a?(String)
+          super(pattern)
+        end
+      end
+    end
+    using StringScannerCheckScanString
+  end
+
   # Generates Source-s.  USE THIS CLASS.
   class SourceFactory
     # Generates a Source object