diff --git a/test/parallel/test-child-process-kill.js b/test/parallel/test-child-process-kill.js
index 00aab44dd1318d..1025c69ba1ac28 100644
--- a/test/parallel/test-child-process-kill.js
+++ b/test/parallel/test-child-process-kill.js
@@ -32,8 +32,10 @@ cat.stderr.on('end', common.mustCall());
 cat.on('exit', common.mustCall((code, signal) => {
   assert.strictEqual(code, null);
   assert.strictEqual(signal, 'SIGTERM');
+  assert.strictEqual(cat.signalCode, 'SIGTERM');
 }));
 
+assert.strictEqual(cat.signalCode, null);
 assert.strictEqual(cat.killed, false);
 cat.kill();
 assert.strictEqual(cat.killed, true);