diff --git a/benchmark/child_process/child-process-exec-stdout.js b/benchmark/child_process/child-process-exec-stdout.js
index 7b93aacff8532d..257a1424927000 100644
--- a/benchmark/child_process/child-process-exec-stdout.js
+++ b/benchmark/child_process/child-process-exec-stdout.js
@@ -10,7 +10,8 @@ const bench = common.createBenchmark(main, {
   dur: [5]
 });
 
-const exec = require('child_process').exec;
+const child_process = require('child_process');
+const exec = child_process.exec;
 function main(conf) {
   bench.start();
 
@@ -28,7 +29,12 @@ function main(conf) {
   });
 
   setTimeout(function() {
-    child.kill();
     bench.end(bytes);
+    if (process.platform === 'win32') {
+      // Sometimes there's a yes.exe process left hanging around on Windows...
+      child_process.execSync(`taskkill /f /t /pid ${child.pid}`);
+    } else {
+      child.kill();
+    }
   }, dur * 1000);
 }