diff --git a/Cargo.lock b/Cargo.lock
index 5814697..54cf126 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2174,6 +2174,7 @@ dependencies = [
  "slack-morphism",
  "tokio",
  "tokio-util",
+ "tower",
  "tower-http",
  "tower-layer",
  "tracing",
diff --git a/Cargo.toml b/Cargo.toml
index b098189..0f1bb1a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,6 +26,7 @@ serde_json = "1.0.115"
 slack-morphism = { version = "2.1.0", features = ["axum"] }
 tokio = { version = "1.36.0", features = ["full"] }
 tokio-util = { version = "0.7.10", features = ["rt"] }
+tower = "0.4.13"
 tower-http = { version = "0.5.2", features = ["timeout", "trace"] }
 tower-layer = "0.3.2"
 tracing = "0.1.40"
diff --git a/src/actors/gift_unwrapper.rs b/src/actors/gift_unwrapper.rs
index ada90d4..35ea68c 100644
--- a/src/actors/gift_unwrapper.rs
+++ b/src/actors/gift_unwrapper.rs
@@ -110,7 +110,7 @@ mod tests {
 
         let messages_received = Arc::new(Mutex::new(Vec::<ReportRequest>::new()));
         let (receiver_actor_ref, receiver_actor_handle) =
-            Actor::spawn(None, TestActor::default(), messages_received.clone())
+            Actor::spawn(None, TestActor::default(), Some(messages_received.clone()))
                 .await
                 .unwrap();
 
diff --git a/src/actors/relay_event_dispatcher.rs b/src/actors/relay_event_dispatcher.rs
index c0a1c20..c0ba346 100644
--- a/src/actors/relay_event_dispatcher.rs
+++ b/src/actors/relay_event_dispatcher.rs
@@ -319,7 +319,7 @@ mod tests {
         let received_messages = Arc::new(Mutex::new(Vec::<GiftWrappedReportRequest>::new()));
 
         let (receiver_ref, receiver_handle) =
-            Actor::spawn(None, TestActor::default(), received_messages.clone())
+            Actor::spawn(None, TestActor::default(), Some(received_messages.clone()))
                 .await
                 .unwrap();
 
diff --git a/src/actors/utilities/output_port_subscriber.rs b/src/actors/utilities/output_port_subscriber.rs
index b250158..35f9907 100644
--- a/src/actors/utilities/output_port_subscriber.rs
+++ b/src/actors/utilities/output_port_subscriber.rs
@@ -4,7 +4,7 @@ use std::fmt::Debug;
 
 pub type OutputPortSubscriber<InputMessage> = Box<dyn OutputPortSubscriberTrait<InputMessage>>;
 
-pub trait OutputPortSubscriberTrait<I>: Debug + Send
+pub trait OutputPortSubscriberTrait<I>: Debug + Send + Sync
 where
     I: Send + Clone + Debug + 'static,
 {
diff --git a/src/actors/utilities/test_actor.rs b/src/actors/utilities/test_actor.rs
index 5477a23..1cf5e62 100644
--- a/src/actors/utilities/test_actor.rs
+++ b/src/actors/utilities/test_actor.rs
@@ -1,13 +1,24 @@
 use anyhow::Result;
+use ractor::SpawnErr;
 use ractor::{Actor, ActorProcessingErr, ActorRef};
 use std::sync::Arc;
 use tokio::sync::Mutex;
+use tokio::task::JoinHandle;
 
 pub type TestActorMessagesReceived<T> = Arc<Mutex<Vec<T>>>;
 pub struct TestActor<T> {
     _phantom: std::marker::PhantomData<T>,
 }
 
+impl<T> TestActor<T>
+where
+    T: Send + Sync + 'static,
+{
+    pub async fn spawn_default() -> Result<(ActorRef<T>, JoinHandle<()>), SpawnErr> {
+        Actor::spawn(None, TestActor::<T>::default(), None).await
+    }
+}
+
 impl<T> Default for TestActor<T> {
     fn default() -> Self {
         Self {
@@ -17,7 +28,7 @@ impl<T> Default for TestActor<T> {
 }
 
 pub struct TestActorState<T> {
-    pub messages_received: TestActorMessagesReceived<T>,
+    pub messages_received: Option<TestActorMessagesReceived<T>>,
 }
 
 #[ractor::async_trait]
@@ -27,12 +38,12 @@ where
 {
     type Msg = T;
     type State = TestActorState<T>;
-    type Arguments = TestActorMessagesReceived<T>;
+    type Arguments = Option<TestActorMessagesReceived<T>>;
 
     async fn pre_start(
         &self,
         _: ActorRef<Self::Msg>,
-        messages_received: TestActorMessagesReceived<T>,
+        messages_received: Option<TestActorMessagesReceived<T>>,
     ) -> Result<Self::State, ActorProcessingErr> {
         let state = TestActorState { messages_received };
         Ok(state)
@@ -44,7 +55,10 @@ where
         message: Self::Msg,
         state: &mut Self::State,
     ) -> Result<(), ActorProcessingErr> {
-        state.messages_received.lock().await.push(message);
+        if let Some(messages_received) = &state.messages_received {
+            messages_received.lock().await.push(message);
+        };
+
         Ok(())
     }
 }
diff --git a/src/adapters/http_server/app_errors.rs b/src/adapters/http_server/app_errors.rs
index 2db35f7..9f79f18 100644
--- a/src/adapters/http_server/app_errors.rs
+++ b/src/adapters/http_server/app_errors.rs
@@ -7,7 +7,6 @@ use axum::{
 #[derive(Debug)]
 enum AppErrorKind {
     General(Error),
-    MissingResponseUrl,
     // TODO: Let's be more specific later
     SlackParsingError(String),
 }
@@ -22,10 +21,6 @@ impl AppError {
         Self { kind }
     }
 
-    pub fn missing_response_url() -> Self {
-        Self::new(AppErrorKind::MissingResponseUrl)
-    }
-
     pub fn slack_parsing_error(context: &str) -> Self {
         Self::new(AppErrorKind::SlackParsingError(context.to_string()))
     }
@@ -39,9 +34,6 @@ impl IntoResponse for AppError {
                 format!("Something went wrong: {}", err),
             )
                 .into_response(),
-            AppErrorKind::MissingResponseUrl => {
-                (StatusCode::BAD_REQUEST, "Missing response URL.".to_string()).into_response()
-            }
             AppErrorKind::SlackParsingError(context) => (
                 StatusCode::BAD_REQUEST,
                 format!("Slack parsing error: {}.", context),
diff --git a/src/adapters/http_server/slack_interactions_route.rs b/src/adapters/http_server/slack_interactions_route.rs
index 7b3832c..f1087b5 100644
--- a/src/adapters/http_server/slack_interactions_route.rs
+++ b/src/adapters/http_server/slack_interactions_route.rs
@@ -20,15 +20,16 @@ pub fn slack_interactions_route() -> Result<Router<WebAppState>> {
         .context("Missing SLACK_SIGNING_SECRET")
         .map(|secret| secret.into())?;
     let listener = SlackEventsAxumListener::<SlackHyperHttpsConnector>::new(listener_environment);
+    let slack_layer = listener
+        .events_layer(&signing_secret)
+        .with_event_extractor(SlackEventsExtractors::interaction_event());
 
-    Ok(Router::new().route(
+    let route = Router::new().route(
         "/slack/interactions",
-        post(slack_interaction_handler).layer(
-            listener
-                .events_layer(&signing_secret)
-                .with_event_extractor(SlackEventsExtractors::interaction_event()),
-        ),
-    ))
+        post(slack_interaction_handler).layer(slack_layer),
+    );
+
+    Ok(route)
 }
 
 fn prepare_slack_client() -> Result<Arc<SlackHyperClient>> {
@@ -117,7 +118,6 @@ fn parse_slack_action(
         .map_err(|_| AppError::slack_parsing_error("reporter_pubkey"))?;
 
     let report_request = ReportRequest::new(reported_event, reporter_pubkey, Some(reporter_text));
-
     let maybe_category = ModerationCategory::from_str(action_id).ok();
     let maybe_moderated_report = report_request.report(maybe_category)?;
 
@@ -188,7 +188,43 @@ fn slack_error_handler(
 #[cfg(test)]
 mod tests {
     use super::*;
+    use crate::actors::TestActor;
+    use axum::{
+        body::Body,
+        http::{Request, StatusCode},
+    };
+    use handlebars::Handlebars;
+    use http_body_util::BodyExt;
     use serde_json::json;
+    use tower::ServiceExt;
+
+    #[tokio::test]
+    async fn test_fails_with_empty_request() {
+        let (test_actor_ref, _receiver_actor_handle) =
+            TestActor::<RelayEventDispatcherMessage>::spawn_default()
+                .await
+                .unwrap();
+        let state = WebAppState {
+            event_dispatcher: test_actor_ref,
+            hb: Arc::new(Handlebars::new()),
+        };
+
+        let router = slack_interactions_route().unwrap().with_state(state);
+
+        let response = router
+            .oneshot(
+                Request::builder()
+                    .uri("/slack/interactions")
+                    .body(Body::empty())
+                    .unwrap(),
+            )
+            .await
+            .unwrap();
+
+        assert_eq!(response.status(), StatusCode::BAD_REQUEST);
+        let body = response.into_body().collect().await.unwrap().to_bytes();
+        assert!(body.is_empty());
+    }
 
     #[test]
     fn test_parse_slack_action_with_hateful() {
diff --git a/src/domain_objects/gift_wrap.rs b/src/domain_objects/gift_wrap.rs
index ab29dc2..42d7745 100644
--- a/src/domain_objects/gift_wrap.rs
+++ b/src/domain_objects/gift_wrap.rs
@@ -12,6 +12,7 @@ impl GiftWrappedReportRequest {
         GiftWrappedReportRequest(event)
     }
 
+    #[allow(unused)]
     pub fn as_json(&self) -> String {
         self.0.as_json()
     }
diff --git a/src/domain_objects/moderated_report.rs b/src/domain_objects/moderated_report.rs
index fcdcb53..9c37694 100644
--- a/src/domain_objects/moderated_report.rs
+++ b/src/domain_objects/moderated_report.rs
@@ -58,10 +58,6 @@ impl ModeratedReport {
     pub fn event(&self) -> Event {
         self.event.clone()
     }
-
-    pub fn to_json(&self) -> String {
-        serde_json::to_string(self).expect("Failed to serialize ModeratedReport to JSON")
-    }
 }
 
 impl Display for ModeratedReport {