diff --git a/crates/frontend/src/routes/timezones.rs b/crates/frontend/src/routes/timezones.rs
index b4c75ed..8a3c1f5 100644
--- a/crates/frontend/src/routes/timezones.rs
+++ b/crates/frontend/src/routes/timezones.rs
@@ -1,4 +1,3 @@
-use axum::response::{IntoResponse, Response};
 use headers::{CacheControl, ContentType, HeaderMapExt};
 use http::{HeaderMap, HeaderValue, Method};
 use itertools::Itertools;
@@ -14,7 +13,7 @@ static VTIMEZONES_JSON: LazyLock<String> = LazyLock::new(|| {
     .unwrap()
 });
 
-pub async fn route_timezones(method: Method) -> Response {
+pub async fn route_timezones(method: Method) -> (HeaderMap, &'static str) {
     let mut headers = HeaderMap::new();
     headers.typed_insert(ContentType::json());
     headers.insert(
@@ -24,7 +23,17 @@ pub async fn route_timezones(method: Method) -> Response {
     headers.typed_insert(CacheControl::new().with_max_age(Duration::from_hours(2)));
 
     if method == Method::HEAD {
-        return headers.into_response();
+        return (headers, "");
     }
-    (headers, VTIMEZONES_JSON.as_str()).into_response()
+    (headers, VTIMEZONES_JSON.as_str())
+}
+
+#[cfg(test)]
+#[tokio::test]
+async fn test_vtimezones_json() -> () {
+    // Since there's an unwrap make sure this doesn't fail
+    assert!(!VTIMEZONES_JSON.as_str().is_empty());
+
+    assert!(route_timezones(Method::HEAD).await.1.is_empty());
+    assert!(!route_timezones(Method::GET).await.1.is_empty());
 }