diff --git a/doc/CustomRules.md b/doc/CustomRules.md
index 53d641a5..bbbe606f 100644
--- a/doc/CustomRules.md
+++ b/doc/CustomRules.md
@@ -45,7 +45,7 @@ module.exports = {
   "parser": "micromark",
   "function": (params, onError) => {
     const blockquotes = params.parsers.micromark.tokens
-      .filter(((token) => token.type === "blockQuote"));
+      .filter((token) => token.type === "blockQuote");
     for (const blockquote of blockquotes) {
       const lines = blockquote.endLine - blockquote.startLine + 1;
       onError({
@@ -70,7 +70,7 @@ module.exports = {
   "parser": "markdownit",
   "function": (params, onError) => {
     const blockquotes = params.parsers.markdownit.tokens
-      .filter(((token) => token.type === "blockquote_open"));
+      .filter((token) => token.type === "blockquote_open");
     for (const blockquote of blockquotes) {
       const [ startIndex, endIndex ] = blockquote.map;
       const lines = endIndex - startIndex;
diff --git a/test/markdownlint-test-micromark.mjs b/test/markdownlint-test-micromark.mjs
index 8f2a3d38..7abe2139 100644
--- a/test/markdownlint-test-micromark.mjs
+++ b/test/markdownlint-test-micromark.mjs
@@ -86,7 +86,7 @@ test("filterByPredicate/filterByTypes", async(t) => {
   t.plan(1);
   const tokens = await testTokens;
   const byPredicate = filterByPredicate(tokens, () => true);
-  const allTypes = new Set(byPredicate.map(((token) => token.type)));
+  const allTypes = new Set(byPredicate.map((token) => token.type));
   const byTypes = filterByTypes(tokens, [ ...allTypes.values() ], true);
   t.deepEqual(byPredicate, byTypes);
 });
diff --git a/test/rules/any-blockquote.js b/test/rules/any-blockquote.js
index d5537169..0362242a 100644
--- a/test/rules/any-blockquote.js
+++ b/test/rules/any-blockquote.js
@@ -16,7 +16,7 @@ module.exports = [
     "parser": "micromark",
     "function": (params, onError) => {
       const blockquotes = params.parsers.micromark.tokens
-        .filter(((token) => token.type === "blockQuote"));
+        .filter((token) => token.type === "blockQuote");
       for (const blockquote of blockquotes) {
         const lines = blockquote.endLine - blockquote.startLine + 1;
         onError({
@@ -39,7 +39,7 @@ module.exports = [
     "parser": "markdownit",
     "function": (params, onError) => {
       const blockquotes = params.parsers.markdownit.tokens
-        .filter(((token) => token.type === "blockquote_open"));
+        .filter((token) => token.type === "blockquote_open");
       for (const blockquote of blockquotes) {
         const [ startIndex, endIndex ] = blockquote.map;
         const lines = endIndex - startIndex;
diff --git a/test/rules/lint-javascript.js b/test/rules/lint-javascript.js
index 6a61cd8b..9a10812d 100644
--- a/test/rules/lint-javascript.js
+++ b/test/rules/lint-javascript.js
@@ -15,7 +15,7 @@ module.exports = {
   "parser": "markdownit",
   "function": (params, onError) => {
     const fences = params.parsers.markdownit.tokens
-      .filter(((token) => token.type === "fence"));
+      .filter((token) => token.type === "fence");
     for (const fence of fences) {
       if (languageJavaScript.test(fence.info)) {
         const results = linter.verify(fence.content, js.configs.recommended);
diff --git a/test/rules/validate-json.js b/test/rules/validate-json.js
index ccf30a77..4a88e1ad 100644
--- a/test/rules/validate-json.js
+++ b/test/rules/validate-json.js
@@ -13,7 +13,7 @@ module.exports = {
   "asynchronous": true,
   "function": (params, onError) => {
     const fences = params.parsers.markdownit.tokens
-      .filter(((token) => token.type === "fence"));
+      .filter((token) => token.type === "fence");
     for (const fence of fences) {
       if (/jsonc?/i.test(fence.info)) {
         const errors = [];