Fix tests

README.md

@@ -423,17 +423,16 @@ Notice that nearly every feature below has at least subtle differences from Java
     <td align="middle">✅</td>
     <td align="middle">✅</td>
     <td>
-      ✔ Any char (any flags)<br>
+      ✔ Any char (with any flags)<br>
       ✔ Identity escape in char class<br>
     </td>
   </tr>
   <tr valign="top">
-    <td>Non-newline</td>
+    <td>Not newline</td>
     <td><code>\N</code></td>
     <td align="middle">✅</td>
     <td align="middle">✅</td>
     <td>
-      ✔ Excludes only <code>\n</code> (any flags)<br>
       ✔ Identity escape in char class<br>
     </td>
   </tr>

spec/helpers/features.js

@@ -6,9 +6,19 @@ const duplicateCaptureNamesSupported = (() => {
   }
   return true;
 })();
-
 const maxTargetForDuplicateNames = duplicateCaptureNamesSupported ? null : 'ES2024';
 
+const patternModsSupported = (() => {
+  try {
+    new RegExp('(?i:)');
+  } catch (e) {
+    return false;
+  }
+  return true;
+})();
+const maxTargetForPatternMods = patternModsSupported ? null : 'ESNext';
+
 export {
   maxTargetForDuplicateNames,
+  maxTargetForPatternMods,
 };

spec/match-char-set.spec.js

@@ -1,4 +1,5 @@
 import {r} from '../src/utils.js';
+import {maxTargetForPatternMods} from './helpers/features.js';
 import {matchers} from './helpers/matchers.js';
 
 beforeEach(() => {
@@ -14,7 +15,10 @@ describe('CharacterSet', () => {
     });
 
     it('should match line feed with flag m disabled', () => {
-      expect('\n').toExactlyMatch(r`(?-m)\O`);
+      expect('\n').toExactlyMatch({
+        pattern: r`(?-m)\O`,
+        maxTarget: maxTargetForPatternMods,
+      });
     });
 
     it('should be identity escape within a char class', () => {