diff --git a/test/suite/api/language-contribution.test.ts b/test/suite/api/language-contribution.test.ts
index a0554bc..9f7989b 100644
--- a/test/suite/api/language-contribution.test.ts
+++ b/test/suite/api/language-contribution.test.ts
@@ -6,6 +6,8 @@ import * as vscode from 'vscode';
 
 import { strictEqual } from '../../util/assert';
 import TextmateLanguageService from '../../../src/main';
+import { jsonify } from '../../util/jsonify';
+import { isWebRuntime } from '../../util/runtime';
 
 const { getGrammarContribution, getLanguageContribution, getLanguageConfiguration, getContributorExtension } = TextmateLanguageService.api;
 
@@ -36,6 +38,10 @@ suite('test/api/languageConfiguration.test.ts (src/api.ts)', async function() {
 
 		const languageConfiguration = await getLanguageConfiguration(globalThis.languageId);
 
+		if (isWebRuntime) {
+			console.log(jsonify(languageConfiguration));
+		}
+
 		strictEqual(languageConfiguration.wordPattern instanceof RegExp, globalThis.languageId === 'typescript');
 
 		strictEqual(Array.isArray(languageConfiguration.brackets), true);
diff --git a/test/util/jsonify.ts b/test/util/jsonify.ts
index 840deb5..be001e7 100644
--- a/test/util/jsonify.ts
+++ b/test/util/jsonify.ts
@@ -34,6 +34,10 @@ function replaceClassesWithStrings(key: string, value: any): any {
 		return value.toString();
 	}
 
+	if (value instanceof RegExp) {
+		return value.toString();
+	}
+
 	return value;
 }