diff --git a/test/parallel/test-http2-getpackedsettings.js b/test/parallel/test-http2-getpackedsettings.js
index 4f5970522f13b3..f26539a0108e9d 100644
--- a/test/parallel/test-http2-getpackedsettings.js
+++ b/test/parallel/test-http2-getpackedsettings.js
@@ -29,6 +29,7 @@ assert.deepStrictEqual(val, check);
   ['maxHeaderListSize', 2 ** 32 - 1],
   ['maxHeaderSize', 0],
   ['maxHeaderSize', 2 ** 32 - 1],
+  ['customSettings', { 9999: 301}]
 ].forEach((i) => {
   // Valid options should not throw.
   http2.getPackedSettings({ [i[0]]: i[1] });
@@ -93,6 +94,8 @@ http2.getPackedSettings({ enablePush: false });
     0x00, 0x05, 0x00, 0x00, 0x4e, 0x20,
     0x00, 0x06, 0x00, 0x00, 0x00, 0x64,
     0x00, 0x08, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x08, 0x00, 0x00, 0x00, 0x00,
+    0x27, 0x0F, 0x00, 0x00, 0x01, 0x2d
   ]);
 
   const packed = http2.getPackedSettings({
@@ -104,9 +107,10 @@ http2.getPackedSettings({ enablePush: false });
     maxHeaderSize: 100,
     enablePush: true,
     enableConnectProtocol: false,
-    foo: 'ignored'
+    foo: 'ignored',
+    customSettings: { 9999: 301}
   });
-  assert.strictEqual(packed.length, 42);
+  assert.strictEqual(packed.length, 48);
   assert.deepStrictEqual(packed, check);
 }
 
@@ -124,7 +128,8 @@ http2.getPackedSettings({ enablePush: false });
     0x00, 0x04, 0x00, 0x00, 0x00, 0x64,
     0x00, 0x06, 0x00, 0x00, 0x00, 0x64,
     0x00, 0x02, 0x00, 0x00, 0x00, 0x01,
-    0x00, 0x08, 0x00, 0x00, 0x00, 0x00]);
+    0x00, 0x08, 0x00, 0x00, 0x00, 0x00,
+    0x27, 0x0F, 0x00, 0x00, 0x01, 0x2d]);
 
   [1, true, '', [], {}, NaN].forEach((input) => {
     assert.throws(() => {
@@ -157,6 +162,7 @@ http2.getPackedSettings({ enablePush: false });
   assert.strictEqual(settings.maxHeaderSize, 100);
   assert.strictEqual(settings.enablePush, true);
   assert.strictEqual(settings.enableConnectProtocol, false);
+  assert.deepStrictEqual(settings.customSettings, { 9999: 301});
 }
 
 {
diff --git a/test/parallel/test-http2-update-settings.js b/test/parallel/test-http2-update-settings.js
index e99ee2bcf150d8..69a5d74ac5c444 100644
--- a/test/parallel/test-http2-update-settings.js
+++ b/test/parallel/test-http2-update-settings.js
@@ -19,7 +19,8 @@ testUpdateSettingsWith({
     'maxHeaderListSize': 1,
     'maxFrameSize': 16385,
     'enablePush': false,
-    'enableConnectProtocol': true
+    'enableConnectProtocol': true,
+    'customSettings': { 9999: 301}
   }
 });
 testUpdateSettingsWith({