diff --git a/editoast/Cargo.lock b/editoast/Cargo.lock
index 86e93ff2c30..bf67cf18972 100644
--- a/editoast/Cargo.lock
+++ b/editoast/Cargo.lock
@@ -1363,6 +1363,7 @@ dependencies = [
  "opentelemetry",
  "opentelemetry-otlp",
  "opentelemetry-semantic-conventions",
+ "opentelemetry-stdout",
  "opentelemetry_sdk",
  "ordered-float",
  "osm_to_railjson",
@@ -3085,6 +3086,23 @@ version = "0.26.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "db945c1eaea8ac6a9677185357480d215bb6999faa9f691d0c4d4d641eab7a09"
 
+[[package]]
+name = "opentelemetry-stdout"
+version = "0.27.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bc8a298402aa5c260be90d10dc54b5a7d4e1025c354848f8e2c976d761351049"
+dependencies = [
+ "async-trait",
+ "chrono",
+ "futures-util",
+ "opentelemetry",
+ "opentelemetry_sdk",
+ "ordered-float",
+ "serde",
+ "serde_json",
+ "thiserror 1.0.69",
+]
+
 [[package]]
 name = "opentelemetry_sdk"
 version = "0.27.1"
diff --git a/editoast/Cargo.toml b/editoast/Cargo.toml
index b70a36242b0..c357a26f39e 100644
--- a/editoast/Cargo.toml
+++ b/editoast/Cargo.toml
@@ -146,6 +146,7 @@ opentelemetry-otlp = { version = "0.27.0", default-features = false, features =
   "trace",
 ] }
 opentelemetry-semantic-conventions.workspace = true
+opentelemetry-stdout = { version = "0.27.0" }
 opentelemetry_sdk = { version = "0.27.1", features = ["rt-tokio", "trace"] }
 ordered-float = { version = "4.5.0", features = ["serde"] }
 osm_to_railjson = { path = "./osm_to_railjson" }
diff --git a/editoast/src/main.rs b/editoast/src/main.rs
index 7ca4b46553f..9e80ae9b60c 100644
--- a/editoast/src/main.rs
+++ b/editoast/src/main.rs
@@ -33,10 +33,12 @@ use client::Commands;
 use editoast_models::DbConnectionPoolV2;
 use models::RollingStockModel;
 use opentelemetry::trace::TracerProvider as _;
+use opentelemetry_sdk::export::trace::SpanExporter;
 use opentelemetry_sdk::propagation::TraceContextPropagator;
 use opentelemetry_sdk::resource::EnvResourceDetector;
 use opentelemetry_sdk::resource::SdkProvidedResourceDetector;
 use opentelemetry_sdk::resource::TelemetryResourceDetector;
+use tracing_subscriber::util::TryInitError;
 pub use views::AppState;
 
 use models::prelude::*;
@@ -66,12 +68,16 @@ pub use valkey_utils::ValkeyConnection;
 /// - we *expect* a webserver to output logging information, so since it's an expected
 ///   output (and not extra information), it should be on stdout
 #[derive(Debug, PartialEq)]
-enum EditoastMode {
+pub enum EditoastMode {
     Webservice,
     Cli,
 }
 
-fn init_tracing(mode: EditoastMode, telemetry_config: &client::TelemetryConfig) {
+pub fn try_init_tracing<T: SpanExporter + 'static>(
+    mode: EditoastMode,
+    telemetry_config: &client::TelemetryConfig,
+    exporter: T,
+) -> Result<(), TryInitError> {
     let env_filter_layer = tracing_subscriber::EnvFilter::builder()
         // Set the default log level to 'info'
         .with_default_directive(tracing_subscriber::filter::LevelFilter::INFO.into())
@@ -89,11 +95,6 @@ fn init_tracing(mode: EditoastMode, telemetry_config: &client::TelemetryConfig)
     let telemetry_layer = match telemetry_config.telemetry_kind {
         client::TelemetryKind::None => None,
         client::TelemetryKind::Opentelemetry => {
-            let exporter = opentelemetry_otlp::SpanExporter::builder()
-                .with_tonic()
-                .with_endpoint(telemetry_config.telemetry_endpoint.as_str())
-                .build()
-                .expect("failed to build a span exporter");
             let resource = Resource::new(vec![KeyValue::new(
                 opentelemetry_semantic_conventions::resource::SERVICE_NAME,
                 telemetry_config.service_name.clone(),
@@ -116,11 +117,12 @@ fn init_tracing(mode: EditoastMode, telemetry_config: &client::TelemetryConfig)
             Some(layer)
         }
     };
+
     tracing_subscriber::registry()
         .with(telemetry_layer)
         .with(env_filter_layer)
         .with(fmt_layer)
-        .init();
+        .try_init()
 }
 
 impl EditoastMode {
@@ -151,7 +153,17 @@ async fn main() {
 
 async fn run() -> Result<(), Box<dyn Error + Send + Sync>> {
     let client = Client::parse();
-    init_tracing(EditoastMode::from_client(&client), &client.telemetry_config);
+    let exporter = opentelemetry_otlp::SpanExporter::builder()
+        .with_tonic()
+        .with_endpoint(client.telemetry_config.telemetry_endpoint.as_str())
+        .build()
+        .expect("failed to build a span exporter");
+    try_init_tracing(
+        EditoastMode::from_client(&client),
+        &client.telemetry_config,
+        exporter,
+    )
+    .expect("failed to init tracing");
 
     let pg_config = client.postgres_config;
     let db_pool =
diff --git a/editoast/src/views/test_app.rs b/editoast/src/views/test_app.rs
index 9ab47d93081..b481b61a840 100644
--- a/editoast/src/views/test_app.rs
+++ b/editoast/src/views/test_app.rs
@@ -14,12 +14,14 @@ use tower_http::trace::TraceLayer;
 use url::Url;
 
 use crate::{
+    client::{TelemetryConfig, TelemetryKind},
     core::{mocking::MockingClient, CoreClient},
     generated_data::speed_limit_tags_config::SpeedLimitTagIds,
     infra_cache::InfraCache,
     map::MapLayers,
+    try_init_tracing,
     valkey_utils::ValkeyConfig,
-    AppState, ValkeyClient,
+    AppState, EditoastMode, ValkeyClient,
 };
 use axum_test::TestRequest;
 use axum_test::TestServer;
@@ -106,16 +108,12 @@ impl TestAppBuilder {
         };
 
         // Setup tracing
-        let sub = tracing_subscriber::fmt()
-            .pretty()
-            .with_env_filter(
-                tracing_subscriber::EnvFilter::builder()
-                    .with_default_directive(tracing_subscriber::filter::LevelFilter::DEBUG.into())
-                    .from_env_lossy(),
-            )
-            .with_span_events(tracing_subscriber::fmt::format::FmtSpan::CLOSE)
-            .finish();
-        let tracing_guard = tracing::subscriber::set_default(sub);
+        let exporter = opentelemetry_stdout::SpanExporter::default();
+        let telemety_config = TelemetryConfig {
+            telemetry_kind: TelemetryKind::Opentelemetry,
+            ..Default::default()
+        };
+        let _ = try_init_tracing(EditoastMode::Webservice, &telemety_config, exporter);
 
         // Config valkey
         let valkey = ValkeyClient::new(config.valkey_config.clone())
@@ -175,7 +173,6 @@ impl TestAppBuilder {
             server,
             db_pool: db_pool_v2,
             core_client,
-            tracing_guard,
         }
     }
 }
@@ -188,8 +185,6 @@ pub(crate) struct TestApp {
     server: TestServer,
     db_pool: Arc<DbConnectionPoolV2>,
     core_client: Arc<CoreClient>,
-    #[allow(unused)] // included here to extend its lifetime, not meant to be used in any way
-    tracing_guard: tracing::subscriber::DefaultGuard,
 }
 
 impl TestApp {