diff --git a/benchmark/util/format.js b/benchmark/util/format.js
index 042b8a93ccfcf2..2a4a20097c72d3 100644
--- a/benchmark/util/format.js
+++ b/benchmark/util/format.js
@@ -16,7 +16,7 @@ const inputs = {
 };
 
 const bench = common.createBenchmark(main, {
-  n: [4e6],
+  n: [1e5],
   type: Object.keys(inputs)
 });
 
diff --git a/benchmark/util/inspect-array.js b/benchmark/util/inspect-array.js
index 8b3c54aeb942fe..4fd73785f789d1 100644
--- a/benchmark/util/inspect-array.js
+++ b/benchmark/util/inspect-array.js
@@ -4,8 +4,8 @@ const common = require('../common');
 const util = require('util');
 
 const bench = common.createBenchmark(main, {
-  n: [1e3],
-  len: [1e5],
+  n: [5e2],
+  len: [1e2, 1e5],
   type: [
     'denseArray',
     'sparseArray',
diff --git a/benchmark/util/inspect-proxy.js b/benchmark/util/inspect-proxy.js
index 5427df9952c250..3c82d50ac3c0ce 100644
--- a/benchmark/util/inspect-proxy.js
+++ b/benchmark/util/inspect-proxy.js
@@ -3,7 +3,7 @@
 const util = require('util');
 const common = require('../common.js');
 
-const bench = common.createBenchmark(main, { n: [1e6] });
+const bench = common.createBenchmark(main, { n: [2e4] });
 
 function main({ n }) {
   const proxyA = new Proxy({}, { get: () => {} });
diff --git a/benchmark/util/inspect.js b/benchmark/util/inspect.js
index 35253ac96682eb..9ba3020fd0e55b 100644
--- a/benchmark/util/inspect.js
+++ b/benchmark/util/inspect.js
@@ -9,7 +9,7 @@ const opts = {
   none: undefined
 };
 const bench = common.createBenchmark(main, {
-  n: [2e6],
+  n: [2e4],
   method: [
     'Object',
     'Object_empty',
@@ -81,7 +81,7 @@ function main({ method, n, option }) {
       benchmark(n, new Error('error'), options);
       break;
     case 'Array':
-      benchmark(n, Array(20).fill().map((_, i) => i), options);
+      benchmark(n, Array(50).fill().map((_, i) => i), options);
       break;
     case 'TypedArray':
       obj = new Uint8Array(Array(50).fill().map((_, i) => i));
diff --git a/benchmark/util/normalize-encoding.js b/benchmark/util/normalize-encoding.js
index 73cbadff72b8ca..47c8bce277cf3d 100644
--- a/benchmark/util/normalize-encoding.js
+++ b/benchmark/util/normalize-encoding.js
@@ -5,26 +5,23 @@ const assert = require('assert');
 
 const groupedInputs = {
   group_common: ['undefined', 'utf8', 'utf-8', 'base64',
-                 'binary', 'latin1', 'ucs-2'],
-  group_upper: ['UTF-8', 'UTF8', 'UCS2', 'UTF-16LE',
-                'UTF16LE', 'BASE64', 'UCS-2'],
-  group_uncommon: ['foo', '1', 'false', 'undefined', '[]', '{}'],
+                 'binary', 'latin1', 'ucs2'],
+  group_upper: ['UTF-8', 'UTF8', 'UCS2',
+                'UTF16LE', 'BASE64', 'UCS2'],
+  group_uncommon: ['foo'],
   group_misc: ['', 'utf16le', 'hex', 'HEX', 'BINARY']
 };
 
 const inputs = [
-  '',
-  'utf8', 'utf-8', 'UTF-8',
-  'UTF8', 'Utf8', 'uTf-8', 'utF-8',
-  'ucs2', 'UCS2', 'UcS2',
-  'ucs-2', 'UCS-2', 'UcS-2',
-  'utf16le', 'utf-16le', 'UTF-16LE', 'UTF16LE',
+  '', 'utf8', 'utf-8', 'UTF-8', 'UTF8', 'Utf8',
+  'ucs2', 'UCS2', 'utf16le', 'UTF16LE',
   'binary', 'BINARY', 'latin1', 'base64', 'BASE64',
-  'hex', 'HEX', 'foo', '1', 'false', 'undefined', '[]', '{}'];
+  'hex', 'HEX', 'foo', 'undefined'
+];
 
 const bench = common.createBenchmark(main, {
   input: inputs.concat(Object.keys(groupedInputs)),
-  n: [1e7]
+  n: [1e5]
 }, {
   flags: '--expose-internals'
 });
@@ -39,16 +36,8 @@ function getInput(input) {
       return groupedInputs.group_uncommon;
     case 'group_misc':
       return groupedInputs.group_misc;
-    case '1':
-      return [1];
-    case 'false':
-      return [false];
     case 'undefined':
       return [undefined];
-    case '[]':
-      return [[]];
-    case '{}':
-      return [{}];
     default:
       return [input];
   }
diff --git a/benchmark/util/splice-one.js b/benchmark/util/splice-one.js
index 5c2a39f6d72a11..4ca7c8564d3fc4 100644
--- a/benchmark/util/splice-one.js
+++ b/benchmark/util/splice-one.js
@@ -3,7 +3,7 @@
 const common = require('../common');
 
 const bench = common.createBenchmark(main, {
-  n: [1e7],
+  n: [1e5],
   pos: ['start', 'middle', 'end'],
   size: [10, 100, 500],
 }, { flags: ['--expose-internals'] });
diff --git a/benchmark/util/type-check.js b/benchmark/util/type-check.js
index e1d1ac553fedcf..dc07f4f9d952bd 100644
--- a/benchmark/util/type-check.js
+++ b/benchmark/util/type-check.js
@@ -29,7 +29,7 @@ const bench = common.createBenchmark(main, {
   type: Object.keys(args),
   version: ['native', 'js'],
   argument: ['true', 'false-primitive', 'false-object'],
-  n: [5e6]
+  n: [1e5]
 }, {
   flags: ['--expose-internals']
 });
diff --git a/test/parallel/test-benchmark-util.js b/test/parallel/test-benchmark-util.js
index 838e51daac26b4..97b02bbdeed5cd 100644
--- a/test/parallel/test-benchmark-util.js
+++ b/test/parallel/test-benchmark-util.js
@@ -13,5 +13,6 @@ runBenchmark('util',
               'pos=start',
               'size=1',
               'type=',
+              'len=1',
               'version=native'],
              { NODEJS_BENCHMARK_ZERO_ALLOWED: 1 });