diff --git a/.github/workflows/linux-test.yaml b/.github/workflows/linux-test.yaml
index 445ea7c..b90a28d 100644
--- a/.github/workflows/linux-test.yaml
+++ b/.github/workflows/linux-test.yaml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ['3.3', '3.2', '3.1', '3.0', '2.7']
+        ruby: ['3.4', '3.3', '3.2', '3.1', '3.0', '2.7']
         os: [ubuntu-latest]
         experimental: [false]
         include:
diff --git a/.github/workflows/macos-test.yaml b/.github/workflows/macos-test.yaml
index 18a2e2a..20efc68 100644
--- a/.github/workflows/macos-test.yaml
+++ b/.github/workflows/macos-test.yaml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ['3.3', '3.2', '3.1', '3.0', '2.7']
+        ruby: ['3.4', '3.3', '3.2', '3.1', '3.0', '2.7']
         os: [macos-latest]
 
     name: Ruby ${{ matrix.ruby }} on ${{ matrix.os }}
diff --git a/.github/workflows/windows-test.yaml b/.github/workflows/windows-test.yaml
index 186d0ad..e8f9ed5 100644
--- a/.github/workflows/windows-test.yaml
+++ b/.github/workflows/windows-test.yaml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ['3.3', '3.2', '3.1', '3.0', '2.7']
+        ruby: ['3.4', '3.3', '3.2', '3.1', '3.0', '2.7']
         os:
           - windows-latest
     name: Ruby ${{ matrix.ruby }} on ${{ matrix.os }}
diff --git a/lib/fluent/plugin/parser_winevt_xml.rb b/lib/fluent/plugin/parser_winevt_xml.rb
index 0963c11..34b5be2 100644
--- a/lib/fluent/plugin/parser_winevt_xml.rb
+++ b/lib/fluent/plugin/parser_winevt_xml.rb
@@ -20,7 +20,9 @@ def MAKELONG(low, high)
     end
 
     def event_id(system_elem)
-      return (system_elem/'EventID').text rescue nil if @preserve_qualifiers
+      if @preserve_qualifiers
+        return (system_elem/'EventID').text rescue nil
+      end
 
       qualifiers = (system_elem/'EventID').attribute("Qualifiers").text rescue nil
       if qualifiers