diff --git a/lib/ruby_lsp/standard/wraps_built_in_lsp_standardizer.rb b/lib/ruby_lsp/standard/wraps_built_in_lsp_standardizer.rb
index 23794042..60012a2a 100644
--- a/lib/ruby_lsp/standard/wraps_built_in_lsp_standardizer.rb
+++ b/lib/ruby_lsp/standard/wraps_built_in_lsp_standardizer.rb
@@ -51,7 +51,7 @@ def run_diagnostic(uri, document)
             severity: severity,
             range: RubyLsp::Interface::Range.new(
               start: RubyLsp::Interface::Position.new(line: loc[:start_line] - 1, character: loc[:start_column] - 1),
-              end: RubyLsp::Interface::Position.new(line: loc[:last_line] - 1, character: loc[:last_column] - 1)
+              end: RubyLsp::Interface::Position.new(line: loc[:last_line] - 1, character: loc[:last_column])
             )
             # TODO: We need to do something like to support quickfixes thru code actions
             # See: https://github.com/Shopify/ruby-lsp/blob/4c1906172add4d5c39c35d3396aa29c768bfb898/lib/ruby_lsp/requests/support/rubocop_diagnostic.rb#L62
diff --git a/test/ruby_lsp_addon_test.rb b/test/ruby_lsp_addon_test.rb
index edf45943..8c1f12d3 100644
--- a/test/ruby_lsp_addon_test.rb
+++ b/test/ruby_lsp_addon_test.rb
@@ -51,7 +51,7 @@ def test_diagnostic
       assert_equal 1, result.response.items.size
       item = result.response.items.first
       assert_equal({line: 0, character: 4}, item.range.start.to_hash)
-      assert_equal({line: 0, character: 10}, item.range.end.to_hash)
+      assert_equal({line: 0, character: 11}, item.range.end.to_hash)
       assert_equal RubyLsp::Constant::DiagnosticSeverity::INFORMATION, item.severity
       assert_equal "Style/StringLiterals", item.code
       assert_equal "https://docs.rubocop.org/rubocop/cops_style.html#stylestringliterals", item.code_description.href