diff --git a/lib/rules/test-case-property-ordering.js b/lib/rules/test-case-property-ordering.js
index 73cb700f..335ec1dd 100644
--- a/lib/rules/test-case-property-ordering.js
+++ b/lib/rules/test-case-property-ordering.js
@@ -45,7 +45,8 @@ module.exports = {
       'output',
       'options',
       'parser',
-      'parserOptions',
+      'languageOptions', // used in eslint flat config
+      'parserOptions', // used in eslintrc config
       'globals',
       'env',
       'errors',
diff --git a/tests/lib/rules/test-case-property-ordering.js b/tests/lib/rules/test-case-property-ordering.js
index cb20b85c..149278d1 100644
--- a/tests/lib/rules/test-case-property-ordering.js
+++ b/tests/lib/rules/test-case-property-ordering.js
@@ -214,5 +214,27 @@ ruleTester.run('test-case-property-ordering', rule, {
         },
       ],
     },
+    {
+      code: `
+        new RuleTester().run('foo', bar, {
+          valid: [
+            {\ncode: "foo",\noutput: "",\nerrors: ["baz"],\nlanguageOptions: "",\n},
+          ]
+        });
+      `,
+      output: `
+        new RuleTester().run('foo', bar, {
+          valid: [
+            {\ncode: "foo",\noutput: "",\nlanguageOptions: "",\nerrors: ["baz"],\n},
+          ]
+        });
+      `,
+      errors: [
+        {
+          message:
+            'The properties of a test case should be placed in a consistent order: [code, output, languageOptions, errors].',
+        },
+      ],
+    },
   ],
 });