diff --git a/benchmark/es/defaultparams-bench.js b/benchmark/es/defaultparams-bench.js
index 56d04cd95b..1393abbe54 100644
--- a/benchmark/es/defaultparams-bench.js
+++ b/benchmark/es/defaultparams-bench.js
@@ -42,6 +42,8 @@ function main(conf) {
   const n = +conf.millions * 1e6;
 
   switch (conf.method) {
+    case '':
+      // Empty string falls through to next line as default, mostly for tests.
     case 'withoutdefaults':
       runOldStyleDefaults(n);
       break;
diff --git a/benchmark/es/destructuring-bench.js b/benchmark/es/destructuring-bench.js
index 3288e009a0..a6c9a81ae0 100644
--- a/benchmark/es/destructuring-bench.js
+++ b/benchmark/es/destructuring-bench.js
@@ -38,6 +38,8 @@ function main(conf) {
   const n = +conf.millions * 1e6;
 
   switch (conf.method) {
+    case '':
+      // Empty string falls through to next line as default, mostly for tests.
     case 'swap':
       runSwapManual(n);
       break;
diff --git a/benchmark/es/destructuring-object-bench.js b/benchmark/es/destructuring-object-bench.js
index 3edfa6d60b..63e085a242 100644
--- a/benchmark/es/destructuring-object-bench.js
+++ b/benchmark/es/destructuring-object-bench.js
@@ -37,6 +37,8 @@ function main(conf) {
   const n = +conf.millions * 1e6;
 
   switch (conf.method) {
+    case '':
+      // Empty string falls through to next line as default, mostly for tests.
     case 'normal':
       runNormal(n);
       break;
diff --git a/benchmark/es/foreach-bench.js b/benchmark/es/foreach-bench.js
index 26c741b706..62aa02236f 100644
--- a/benchmark/es/foreach-bench.js
+++ b/benchmark/es/foreach-bench.js
@@ -63,6 +63,8 @@ function main(conf) {
     items[i] = i;
 
   switch (conf.method) {
+    case '':
+      // Empty string falls through to next line as default, mostly for tests.
     case 'for':
       fn = useFor;
       break;
diff --git a/benchmark/es/map-bench.js b/benchmark/es/map-bench.js
index 62ff332fd4..035ed1a22a 100644
--- a/benchmark/es/map-bench.js
+++ b/benchmark/es/map-bench.js
@@ -112,6 +112,8 @@ function main(conf) {
   const n = +conf.millions * 1e6;
 
   switch (conf.method) {
+    case '':
+      // Empty string falls through to next line as default, mostly for tests.
     case 'object':
       runObject(n);
       break;
diff --git a/benchmark/es/restparams-bench.js b/benchmark/es/restparams-bench.js
index d893af48f4..32fa985ded 100644
--- a/benchmark/es/restparams-bench.js
+++ b/benchmark/es/restparams-bench.js
@@ -64,6 +64,8 @@ function main(conf) {
   const n = +conf.millions * 1e6;
 
   switch (conf.method) {
+    case '':
+      // Empty string falls through to next line as default, mostly for tests.
     case 'copy':
       runCopyArguments(n);
       break;
diff --git a/benchmark/es/spread-bench.js b/benchmark/es/spread-bench.js
index a9416ad90e..b6dfb5963e 100644
--- a/benchmark/es/spread-bench.js
+++ b/benchmark/es/spread-bench.js
@@ -33,6 +33,8 @@ function main(conf) {
     args[i] = i;
 
   switch (conf.method) {
+    case '':
+      // Empty string falls through to next line as default, mostly for tests.
     case 'apply':
       bench.start();
       for (i = 0; i < n; i++)
diff --git a/benchmark/es/string-concatenations.js b/benchmark/es/string-concatenations.js
index 8bdaefa4da..b7f5c31936 100644
--- a/benchmark/es/string-concatenations.js
+++ b/benchmark/es/string-concatenations.js
@@ -19,14 +19,15 @@ const bench = common.createBenchmark(main, configs);
 
 function main(conf) {
   const n = +conf.n;
-  const mode = conf.mode;
 
   const str = 'abc';
   const num = 123;
 
   let string;
 
-  switch (mode) {
+  switch (conf.mode) {
+    case '':
+      // Empty string falls through to next line as default, mostly for tests.
     case 'multi-concat':
       bench.start();
       for (let i = 0; i < n; i++)
@@ -63,6 +64,8 @@ function main(conf) {
         string = `${num}`;
       bench.end(n);
       break;
+    default:
+      throw new Error('Unexpected method');
   }
 
   return string;
diff --git a/benchmark/es/string-repeat.js b/benchmark/es/string-repeat.js
index a6b389033a..1ddc7db78c 100644
--- a/benchmark/es/string-repeat.js
+++ b/benchmark/es/string-repeat.js
@@ -19,16 +19,23 @@ function main(conf) {
 
   let str;
 
-  if (conf.mode === 'Array') {
-    bench.start();
-    for (let i = 0; i < n; i++)
-      str = new Array(size + 1).join(character);
-    bench.end(n);
-  } else {
-    bench.start();
-    for (let i = 0; i < n; i++)
-      str = character.repeat(size);
-    bench.end(n);
+  switch (conf.mode) {
+    case '':
+      // Empty string falls through to next line as default, mostly for tests.
+    case 'Array':
+      bench.start();
+      for (let i = 0; i < n; i++)
+        str = new Array(size + 1).join(character);
+      bench.end(n);
+      break;
+    case 'repeat':
+      bench.start();
+      for (let i = 0; i < n; i++)
+        str = character.repeat(size);
+      bench.end(n);
+      break;
+    default:
+      throw new Error('Unexpected method');
   }
 
   assert.strictEqual([...str].length, size);
diff --git a/test/parallel/test-benchmark-es.js b/test/parallel/test-benchmark-es.js
new file mode 100644
index 0000000000..569edfc293
--- /dev/null
+++ b/test/parallel/test-benchmark-es.js
@@ -0,0 +1,18 @@
+'use strict';
+
+require('../common');
+
+const runBenchmark = require('../common/benchmark');
+
+runBenchmark('es',
+             [
+               'method=',
+               'millions=0.000001',
+               'count=1',
+               'context=null',
+               'rest=0',
+               'mode=',
+               'n=1',
+               'encoding=ascii',
+               'size=1e1'
+             ]);