diff --git a/test/parallel/test-child-process-spawnsync-timeout.js b/test/parallel/test-child-process-spawnsync-timeout.js
index aeb2be86608cf4..426ac05a43497c 100644
--- a/test/parallel/test-child-process-spawnsync-timeout.js
+++ b/test/parallel/test-child-process-spawnsync-timeout.js
@@ -28,7 +28,14 @@ const { debuglog, getSystemErrorName } = require('util');
 const debug = debuglog('test');
 
 const TIMER = 200;
-const SLEEP = common.platformTimeout(5000);
+let SLEEP = common.platformTimeout(5000);
+
+if (common.isWindows) {
+  // Some of the windows machines in the CI need more time to launch
+  // and receive output from child processes.
+  // https://github.com/nodejs/build/issues/3014
+  SLEEP = common.platformTimeout(15000);
+}
 
 switch (process.argv[2]) {
   case 'child':
diff --git a/test/sequential/test-child-process-execsync.js b/test/sequential/test-child-process-execsync.js
index 5512eaeed7af35..75acbc34a902bd 100644
--- a/test/sequential/test-child-process-execsync.js
+++ b/test/sequential/test-child-process-execsync.js
@@ -30,7 +30,13 @@ const { execFileSync, execSync, spawnSync } = require('child_process');
 const { getSystemErrorName } = require('util');
 
 const TIMER = 200;
-const SLEEP = 2000;
+let SLEEP = 2000;
+if (common.isWindows) {
+  // Some of the windows machines in the CI need more time to launch
+  // and receive output from child processes.
+  // https://github.com/nodejs/build/issues/3014
+  SLEEP = 10000;
+}
 
 const execOpts = { encoding: 'utf8', shell: true };