diff --git a/yamux/src/connection/stream.rs b/yamux/src/connection/stream.rs
index 3f6eb2a2..93891688 100644
--- a/yamux/src/connection/stream.rs
+++ b/yamux/src/connection/stream.rs
@@ -282,8 +282,8 @@ impl Stream {
 
             let config = &self.config;
             let shared = self.shared.lock();
-            let accumulated_max_stream_windows = *self.accumulated_max_stream_windows.lock();
             let rtt = self.rtt.get();
+            let accumulated_max_stream_windows = *self.accumulated_max_stream_windows.lock();
 
             assert!(
                 shared.current_receive_window_size <= shared.max_receive_window_size,
@@ -403,6 +403,7 @@ impl Stream {
 
         self.last_window_update = Instant::now();
         shared.current_receive_window_size += next_window_update;
+        drop(shared);
 
         debug_assert();
 
@@ -610,8 +611,8 @@ impl AsyncWrite for Stream {
 
 impl Drop for Stream {
     fn drop(&mut self) {
-        let mut accumulated_max_stream_windows = self.accumulated_max_stream_windows.lock();
         let max_receive_window_size = self.shared.lock().max_receive_window_size;
+        let mut accumulated_max_stream_windows = self.accumulated_max_stream_windows.lock();
 
         debug_assert!(
             *accumulated_max_stream_windows >= (max_receive_window_size - DEFAULT_CREDIT) as usize,
@@ -648,19 +649,24 @@ impl quickcheck::Arbitrary for Stream {
 
         let mut shared = Shared::arbitrary(g);
         let config = Arc::new(Config::arbitrary(g));
+        let rtt = Rtt::arbitrary(g);
 
-        // Update `shared` to align with `config`.
-        shared.max_receive_window_size = g.gen_range(
+        // Update `shared` to align with `config` and rtt.
+        shared.max_receive_window_size = if rtt.get().is_none() {
             DEFAULT_CREDIT
-                ..cmp::min(
-                    config.max_stream_receive_window.unwrap_or(u32::MAX),
-                    (DEFAULT_CREDIT as usize + config.max_connection_receive_window
-                        - (config.max_num_streams * (DEFAULT_CREDIT as usize)))
-                        .try_into()
-                        .unwrap_or(u32::MAX),
-                )
-                .saturating_add(1),
-        );
+        } else {
+            g.gen_range(
+                DEFAULT_CREDIT
+                    ..cmp::min(
+                        config.max_stream_receive_window.unwrap_or(u32::MAX),
+                        (DEFAULT_CREDIT as usize + config.max_connection_receive_window
+                            - (config.max_num_streams * (DEFAULT_CREDIT as usize)))
+                            .try_into()
+                            .unwrap_or(u32::MAX),
+                    )
+                    .saturating_add(1),
+            )
+        };
         shared.current_receive_window_size = g.gen_range(0..shared.max_receive_window_size);
 
         Self {
@@ -674,7 +680,7 @@ impl quickcheck::Arbitrary for Stream {
                         - config.max_num_streams * DEFAULT_CREDIT as usize
                         + 1),
             ))),
-            rtt: Rtt::arbitrary(g),
+            rtt,
             last_window_update: Instant::now()
                 - std::time::Duration::from_secs(g.gen_range(0..(60 * 60 * 24))),
             config,