diff --git a/packages/bruno-tests/collection/url-serialization/Duplicate Keys.bru b/packages/bruno-tests/collection/url-serialization/Duplicate Keys.bru
new file mode 100644
index 000000000..28f3030f4
--- /dev/null
+++ b/packages/bruno-tests/collection/url-serialization/Duplicate Keys.bru	
@@ -0,0 +1,27 @@
+meta {
+  name: Duplicate Keys
+  type: http
+  seq: 1
+}
+
+post {
+  url: https://echo.usebruno.com
+  body: formUrlEncoded
+  auth: none
+}
+
+headers {
+  Content-Type: application/x-www-form-urlencoded
+}
+
+body:form-urlencoded {
+  tags: frontend
+  tags: api
+  user: john
+}
+
+script:post-response {
+  test('Response body matches expected value', function () {
+      expect(res.getBody()).to.eql("tags=frontend&tags=api&user=john");
+  });
+}
diff --git a/packages/bruno-tests/collection/url-serialization/folder.bru b/packages/bruno-tests/collection/url-serialization/folder.bru
new file mode 100644
index 000000000..0644be667
--- /dev/null
+++ b/packages/bruno-tests/collection/url-serialization/folder.bru
@@ -0,0 +1,8 @@
+meta {
+  name: url-serialization
+  seq: 13
+}
+
+auth {
+  mode: inherit
+}