diff --git a/test/known_issues/test-stdout-buffer-flush-on-exit.js b/test/known_issues/test-stdout-buffer-flush-on-exit.js
index be29081007..709928693e 100644
--- a/test/known_issues/test-stdout-buffer-flush-on-exit.js
+++ b/test/known_issues/test-stdout-buffer-flush-on-exit.js
@@ -15,7 +15,7 @@ if (process.argv[2] === 'child') {
   process.exit();
 }
 
-[16, 18, 20].forEach((exponent) => {
+[22, 21, 20, 19, 18, 17, 16, 16, 17, 18, 19, 20, 21, 22].forEach((exponent) => {
   const bigNum = Math.pow(2, exponent);
   const longLine = lineSeed.repeat(bigNum);
   const cmd = `${process.execPath} ${__filename} child ${exponent} ${bigNum}`;