diff --git a/test/parallel/test-fs-options-immutable.js b/test/parallel/test-fs-options-immutable.js
index 77ce3ebf1de..dfe05a96ef7 100644
--- a/test/parallel/test-fs-options-immutable.js
+++ b/test/parallel/test-fs-options-immutable.js
@@ -9,7 +9,7 @@ const common = require('../common');
 const fs = require('fs');
 const path = require('path');
 
-const options = Object.freeze({});
+const options = common.mustNotMutateObjectDeep({});
 const tmpdir = require('../common/tmpdir');
 tmpdir.refresh();
 
diff --git a/test/parallel/test-https-agent-create-connection.js b/test/parallel/test-https-agent-create-connection.js
index cea335a422e..1ac2c840b0d 100644
--- a/test/parallel/test-https-agent-create-connection.js
+++ b/test/parallel/test-https-agent-create-connection.js
@@ -139,19 +139,16 @@ function createServer() {
   server.listen(0, common.mustCall(() => {
     const port = server.address().port;
     const host = 'localhost';
-    const options = {
+    const options = common.mustNotMutateObjectDeep({
       port: 3000,
-      rejectUnauthorized: false
-    };
+      rejectUnauthorized: false,
+    });
 
     const socket = agent.createConnection(port, host, options);
     socket.on('connect', common.mustCall((data) => {
       socket.end();
     }));
     socket.on('end', common.mustCall(() => {
-      assert.deepStrictEqual(options, {
-        port: 3000, rejectUnauthorized: false
-      });
       server.close();
     }));
   }));
diff --git a/test/parallel/test-https-argument-of-creating.js b/test/parallel/test-https-argument-of-creating.js
index 6f1564826ea..fe6ca9f59a6 100644
--- a/test/parallel/test-https-argument-of-creating.js
+++ b/test/parallel/test-https-argument-of-creating.js
@@ -12,11 +12,13 @@ const dftProtocol = {};
 
 // Test for immutable `opts`
 {
-  const opts = { foo: 'bar', ALPNProtocols: [ 'http/1.1' ] };
+  const opts = common.mustNotMutateObjectDeep({
+    foo: 'bar',
+    ALPNProtocols: [ 'http/1.1' ],
+  });
   const server = https.createServer(opts);
 
   tls.convertALPNProtocols([ 'http/1.1' ], dftProtocol);
-  assert.deepStrictEqual(opts, { foo: 'bar', ALPNProtocols: [ 'http/1.1' ] });
   assert.strictEqual(server.ALPNProtocols.compare(dftProtocol.ALPNProtocols),
                      0);
 }