diff --git a/crates/core/src/driver/mod.rs b/crates/core/src/driver/mod.rs
index 47666fd..0f76c9b 100644
--- a/crates/core/src/driver/mod.rs
+++ b/crates/core/src/driver/mod.rs
@@ -8,7 +8,8 @@ use alloy::network::{Ethereum, TransactionBuilder};
 use alloy::primitives::Bytes;
 use alloy::rpc::types::TransactionReceipt;
 use alloy::rpc::types::trace::geth::{
-    DefaultFrame, GethDebugTracingOptions, GethDefaultTracingOptions, GethTrace, PreStateConfig,
+    CallFrame, GethDebugBuiltInTracerType, GethDebugTracerType, GethDebugTracingOptions, GethTrace,
+    PreStateConfig,
 };
 use alloy::{
     primitives::Address,
@@ -399,12 +400,14 @@ where
             .trace_transaction(
                 execution_receipt,
                 GethDebugTracingOptions {
-                    config: GethDefaultTracingOptions::default().with_enable_return_data(true),
+                    tracer: Some(GethDebugTracerType::BuiltInTracer(
+                        GethDebugBuiltInTracerType::CallTracer,
+                    )),
                     ..Default::default()
                 },
             )?
-            .try_into_default_frame()
-            .expect("Impossible. We can't request default tracing and get some other type back");
+            .try_into_call_frame()
+            .expect("Impossible - we requested a callframe trace so we must get it back");
 
         for expectation in expectations.iter() {
             self.handle_input_expectation_item(
@@ -425,7 +428,7 @@ where
         execution_receipt: &TransactionReceipt,
         node: &T::Blockchain,
         expectation: &ExpectedOutput,
-        tracing_result: &DefaultFrame,
+        tracing_result: &CallFrame,
     ) -> anyhow::Result<()> {
         // TODO: We want to respect the compiler version filter on the expected output but would
         // require some changes to the interfaces of the compiler and such. So, we add it later.
@@ -452,7 +455,7 @@ where
             let expected = expected_calldata
                 .calldata(self.deployed_contracts.entry(case_idx).or_default(), node)
                 .map(Bytes::from)?;
-            let actual = tracing_result.return_value.clone();
+            let actual = tracing_result.output.clone().unwrap_or_default();
             if !expected.starts_with(&actual) {
                 tracing::error!(?execution_receipt, %expected, %actual, "Calldata assertion failed");
                 anyhow::bail!("Calldata assertion failed - Expected {expected} but got {actual}",);
diff --git a/crates/node-interaction/src/blocking_executor.rs b/crates/node-interaction/src/blocking_executor.rs
index baba0c1..5458bb3 100644
--- a/crates/node-interaction/src/blocking_executor.rs
+++ b/crates/node-interaction/src/blocking_executor.rs
@@ -9,6 +9,7 @@ use tokio::{
     runtime::Builder,
     sync::{mpsc::UnboundedSender, oneshot},
 };
+use tracing::Instrument;
 
 /// A blocking async executor.
 ///
@@ -63,6 +64,11 @@ impl BlockingExecutor {
             let (tx, mut rx) = tokio::sync::mpsc::unbounded_channel::<TaskMessage>();
 
             thread::spawn(move || {
+                tracing::info!(
+                    thread_id = ?std::thread::current().id(),
+                    "Starting async runtime thread"
+                );
+
                 let runtime = Builder::new_current_thread()
                     .enable_all()
                     .build()
@@ -107,7 +113,9 @@ impl BlockingExecutor {
         // in the task message. In doing this conversion, we lose some of the type information since
         // we're converting R => dyn Any. However, we will perform down-casting on the result to
         // convert it back into R.
-        let future = Box::pin(async move { Box::new(future.await) as Box<dyn Any + Send> });
+        let future = Box::pin(
+            async move { Box::new(future.await) as Box<dyn Any + Send> }.in_current_span(),
+        );
 
         let task = TaskMessage::new(future, response_tx);
         if let Err(error) = STATE.tx.send(task) {