diff --git a/lib/internal/process/per_thread.js b/lib/internal/process/per_thread.js
index 6d64c636b24435..28b9afe1cf9404 100644
--- a/lib/internal/process/per_thread.js
+++ b/lib/internal/process/per_thread.js
@@ -149,7 +149,10 @@ function wrapProcessMethods(binding) {
       process._exiting = true;
       process.emit('exit', process.exitCode || 0);
     }
-    binding.reallyExit(process.exitCode || 0);
+    // FIXME(joyeecheung): This is an undocumented API that gets monkey-patched
+    // in the user land. Either document it, or deprecate it in favor of a
+    // better public alternative.
+    process.reallyExit(process.exitCode || 0);
   }
 
   function kill(pid, sig) {
diff --git a/test/parallel/test-process-really-exit.js b/test/parallel/test-process-really-exit.js
new file mode 100644
index 00000000000000..c806d6c4aa4808
--- /dev/null
+++ b/test/parallel/test-process-really-exit.js
@@ -0,0 +1,17 @@
+'use strict';
+require('../common');
+const assert = require('assert');
+
+// ensure that the reallyExit hook is executed.
+// see: https://github.com/nodejs/node/issues/25650
+if (process.argv[2] === 'subprocess') {
+  process.reallyExit = function() {
+    console.info('really exited');
+  };
+  process.exit();
+} else {
+  const { spawnSync } = require('child_process');
+  const out = spawnSync(process.execPath, [__filename, 'subprocess']);
+  const observed = out.output[1].toString('utf8').trim();
+  assert.strictEqual(observed, 'really exited');
+}