diff --git a/src/server/telemetry/urlHelpers.js b/src/server/telemetry/urlHelpers.js
index 8747a926..607ad099 100644
--- a/src/server/telemetry/urlHelpers.js
+++ b/src/server/telemetry/urlHelpers.js
@@ -1,4 +1,3 @@
-var url = require('url');
 var { URL } = require('url');
 var merge = require('../../merge');
 
@@ -12,11 +11,7 @@ function mergeOptions(input, options, cb) {
   if (typeof input === 'string') {
     const urlStr = input;
     input = urlToHttpOptions(new URL(urlStr));
-  } else if (
-    input &&
-    input[url.searchParamsSymbol] &&
-    input[url.searchParamsSymbol][url.searchParamsSymbol]
-  ) {
+  } else if (input && input instanceof URL) {
     // url.URL instance
     input = urlToHttpOptions(input);
   } else {
diff --git a/test/server.telemetry.test.js b/test/server.telemetry.test.js
index 98e49f77..4a522c27 100644
--- a/test/server.telemetry.test.js
+++ b/test/server.telemetry.test.js
@@ -9,6 +9,8 @@ var https = require('https');
 
 process.env.NODE_ENV = process.env.NODE_ENV || 'test-node-env';
 var Rollbar = require('../src/server/rollbar');
+var { mergeOptions } = require('../src/server/telemetry/urlHelpers');
+const { URL } = require('url');
 
 function wait(ms) {
   return new Promise((resolve) => {
@@ -413,4 +415,29 @@ vows
       },
     },
   })
+  .addBatch({
+    'while using autoinstrument': {
+      topic: function () {
+        const optionsUsingStringUrl = mergeOptions(
+          'http://example.com/api/users',
+          { method: 'GET', headers: testHeaders1 },
+        );
+        const optionsUsingClassUrl = mergeOptions(
+          new URL('http://example.com/api/users'),
+          { method: 'GET', headers: testHeaders1 },
+        );
+
+        return {
+          optionsUsingStringUrl,
+          optionsUsingClassUrl,
+        };
+      },
+      'mergeOptions should correctly handle URL and options': function ({
+        optionsUsingStringUrl,
+        optionsUsingClassUrl,
+      }) {
+        assert.deepStrictEqual(optionsUsingStringUrl, optionsUsingClassUrl);
+      },
+    },
+  })
   .export(module, { error: false });