diff --git a/devtools/src/lib.rs b/devtools/src/lib.rs
index 151b5c93..3a663384 100644
--- a/devtools/src/lib.rs
+++ b/devtools/src/lib.rs
@@ -104,10 +104,7 @@ where
         state.title(&self.program, window)
     }
 
-    fn subscription(
-        &self,
-        state: &Self::State,
-    ) -> runtime::futures::Subscription<Self::Message> {
+    fn subscription(&self, state: &Self::State) -> Subscription<Self::Message> {
         state.subscription(&self.program)
     }
 
@@ -438,9 +435,19 @@ where
     }
 
     fn subscription(&self, program: &P) -> Subscription<Event<P>> {
-        let subscription =
-            program.subscription(&self.state).map(Event::Program);
-        debug::subscriptions_tracked(subscription.units());
+        let subscription = match &self.mode {
+            Mode::Open { tester } if !tester.is_idle() => {
+                tester.subscription(program).map(Event::Tester)
+            }
+            _ => {
+                let subscription =
+                    program.subscription(&self.state).map(Event::Program);
+
+                debug::subscriptions_tracked(subscription.units());
+
+                subscription
+            }
+        };
 
         let hotkeys =
             futures::keyboard::on_key_press(|key, _modifiers| match key {
@@ -473,7 +480,11 @@ where
     }
 
     fn scale_factor(&self, program: &P, window: window::Id) -> f64 {
-        program.scale_factor(self.state(), window)
+        if let Mode::Open { .. } = &self.mode {
+            1.0
+        } else {
+            program.scale_factor(self.state(), window)
+        }
     }
 
     fn state(&self) -> &P::State {
diff --git a/devtools/src/tester.rs b/devtools/src/tester.rs
index 73a7793a..e5aa441b 100644
--- a/devtools/src/tester.rs
+++ b/devtools/src/tester.rs
@@ -9,6 +9,7 @@ use crate::core::alignment::Horizontal::Right;
 use crate::core::border;
 use crate::core::window;
 use crate::core::{Element, Event, Size, Theme};
+use crate::futures::Subscription;
 use crate::futures::futures::channel::mpsc;
 use crate::icon;
 use crate::program;
@@ -62,8 +63,12 @@ impl<P: Program + 'static> Tester<P> {
         }
     }
 
+    pub fn is_idle(&self) -> bool {
+        matches!(self.state, State::Idle)
+    }
+
     pub fn is_busy(&self) -> bool {
-        matches!(self.state, State::Idle | State::Playing { .. })
+        matches!(self.state, State::Recording { .. } | State::Playing { .. })
     }
 
     pub fn update(&mut self, program: &P, message: Message) -> Task<Tick<P>> {
@@ -160,6 +165,15 @@ impl<P: Program + 'static> Tester<P> {
         }
     }
 
+    pub fn subscription(&self, program: &P) -> Subscription<Tick<P>> {
+        match &self.state {
+            State::Idle | State::Playing { .. } => Subscription::none(),
+            State::Recording { state } => {
+                program.subscription(state).map(Tick::Program)
+            }
+        }
+    }
+
     pub fn view<'a, T: 'static>(
         &'a self,
         program: &P,
diff --git a/examples/todos/Cargo.toml b/examples/todos/Cargo.toml
index de23558e..5e16a2ac 100644
--- a/examples/todos/Cargo.toml
+++ b/examples/todos/Cargo.toml
@@ -7,7 +7,7 @@ publish = false
 
 [dependencies]
 iced.workspace = true
-iced.features = ["tokio", "time-travel", "tester"]
+iced.features = ["tokio", "debug", "time-travel"]
 
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
diff --git a/examples/websocket/Cargo.toml b/examples/websocket/Cargo.toml
index c47e3c93..b2053fa6 100644
--- a/examples/websocket/Cargo.toml
+++ b/examples/websocket/Cargo.toml
@@ -7,7 +7,7 @@ publish = false
 
 [dependencies]
 iced.workspace = true
-iced.features = ["debug", "tokio", "sipper"]
+iced.features = ["tester", "tokio", "sipper"]
 
 warp = "0.3"
 
diff --git a/examples/websocket/src/main.rs b/examples/websocket/src/main.rs
index c52de37e..81083a22 100644
--- a/examples/websocket/src/main.rs
+++ b/examples/websocket/src/main.rs
@@ -1,9 +1,11 @@
 mod echo;
 
+use iced::futures::stream;
 use iced::widget::{
     self, button, center, column, row, scrollable, text, text_input,
 };
 use iced::{Center, Element, Fill, Subscription, Task, color};
+
 use std::sync::LazyLock;
 
 pub fn main() -> iced::Result {
@@ -34,10 +36,7 @@ impl WebSocket {
                 new_message: String::new(),
                 state: State::Disconnected,
             },
-            Task::batch([
-                Task::perform(echo::server::run(), |_| Message::Server),
-                widget::focus_next(),
-            ]),
+            widget::focus_next(),
         )
     }
 
@@ -87,7 +86,11 @@ impl WebSocket {
     }
 
     fn subscription(&self) -> Subscription<Message> {
-        Subscription::run(echo::connect).map(Message::Echo)
+        Subscription::batch([
+            Subscription::run(|| stream::once(echo::server::run()))
+                .map(|_| Message::Server),
+            Subscription::run(echo::connect).map(Message::Echo),
+        ])
     }
 
     fn view(&self) -> Element<Message> {