diff --git a/test-programs/tests/http_server.rs b/test-programs/tests/http_server.rs
index a8e9ae9..a4c9283 100644
--- a/test-programs/tests/http_server.rs
+++ b/test-programs/tests/http_server.rs
@@ -151,6 +151,14 @@ fn http_server() -> Result<()> {
     // connection
     match ureq::get("http://127.0.0.1:8081/response-body-fail").call() {
         Err(ureq::Error::Io(_transport)) => {}
+        Ok(mut response) => match response.body_mut().read_to_vec() {
+            Err(ureq::Error::Io(_transport)) => {}
+            body => {
+                panic!(
+                    "/response-body-fail expected io error, got: {response:?} with body {body:?}",
+                );
+            }
+        },
         result => {
             panic!("/response-body-fail expected io error, got: {result:?}")
         }