diff --git a/test/parallel/test-dgram-ref.js b/test/parallel/test-dgram-ref.js
index 6505ce9b1ec886..7b79340f924b06 100644
--- a/test/parallel/test-dgram-ref.js
+++ b/test/parallel/test-dgram-ref.js
@@ -1,7 +1,14 @@
 'use strict';
-require('../common');
-var dgram = require('dgram');
+const common = require('../common');
+const dgram = require('dgram');
 
 // should not hang, see #1282
 dgram.createSocket('udp4');
 dgram.createSocket('udp6');
+
+{
+  // Test the case of ref()'ing a socket with no handle.
+  const s = dgram.createSocket('udp4');
+
+  s.close(common.mustCall(() => s.ref()));
+}
diff --git a/test/parallel/test-dgram-unref.js b/test/parallel/test-dgram-unref.js
index e5f26b6f3387b8..1b92428a38e18b 100644
--- a/test/parallel/test-dgram-unref.js
+++ b/test/parallel/test-dgram-unref.js
@@ -2,8 +2,18 @@
 const common = require('../common');
 var dgram = require('dgram');
 
-var s = dgram.createSocket('udp4');
-s.bind();
-s.unref();
+{
+  // Test the case of unref()'ing a socket with a handle.
+  const s = dgram.createSocket('udp4');
+  s.bind();
+  s.unref();
+}
+
+{
+  // Test the case of unref()'ing a socket with no handle.
+  const s = dgram.createSocket('udp4');
+
+  s.close(common.mustCall(() => s.unref()));
+}
 
 setTimeout(common.fail, 1000).unref();