diff --git a/proxmox-api-macro/tests/basic.rs b/proxmox-api-macro/tests/basic.rs
index b1eb132a..7dfb78de 100644
--- a/proxmox-api-macro/tests/basic.rs
+++ b/proxmox-api-macro/tests/basic.rs
@@ -106,7 +106,7 @@ fn check_body(router: &Router<Bytes>, path: &str, expect: &'static str) {
         .get
         .as_ref()
         .expect("expected GET method on router at path");
-    let fut = method.call(parameters.unwrap_or(Value::Null));
+    let fut = method.call(parameters.map(Value::Object).unwrap_or(Value::Null));
     let resp = futures::executor::block_on(fut)
         .expect("expected `GET` on test_body to return successfully");
     assert!(resp.status() == 200, "test response should have status 200");
diff --git a/proxmox-api/tests/router.rs b/proxmox-api/tests/router.rs
index aacfbc5b..3a41933e 100644
--- a/proxmox-api/tests/router.rs
+++ b/proxmox-api/tests/router.rs
@@ -1,6 +1,7 @@
 #![feature(async_await)]
 
 use bytes::Bytes;
+use serde_json::Value;
 
 use proxmox_api::Router;
 
@@ -65,7 +66,7 @@ fn check_with_matched_params(
         .get
         .as_ref()
         .expect(&format!("expected GET method on {}", path))
-        .call(params);
+        .call(Value::Object(params));
 
     let response = futures::executor::block_on(apifut)
         .expect("expected the simple test api function to be ready immediately");