diff --git a/src/main.rs b/src/main.rs
index 1077d74..9c7037b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -45,10 +45,15 @@ async fn upload_file(
     }
 
     let mut buffer = Vec::new();
-    let _ = file.read_to_end(&mut buffer);
+    if let Ok(mut f) = File::open(file_name.clone()) {
+        let _ = f.read_to_end(&mut buffer);
+    } else {
+        return HttpResponse::new(StatusCode::INTERNAL_SERVER_ERROR);
+    }
 
     // Verify HMAC
     if let Err(response) = verify_hmac(&req, &buffer, secret_key) {
+        let _ = std::fs::remove_file(file_name);
         return response;
     }
 
@@ -104,10 +109,11 @@ fn verify_hmac(
 #[actix_web::main]
 async fn main() -> std::io::Result<()> {
     std::fs::create_dir_all("uploads").unwrap();
+    let secret_key = std::env::var("SECRET_KEY").unwrap();
 
     let app_state = web::Data::new(AppState {
         file_map: Mutex::new(HashMap::new()),
-        secret_key: "super-long-super-secret-unique-key-goes-here".to_string(),
+        secret_key,
     });
 
     HttpServer::new(move || {
@@ -125,57 +131,12 @@ async fn main() -> std::io::Result<()> {
 mod tests {
     use super::*;
     use actix_web::dev::ServiceResponse;
-    use actix_web::{body::to_bytes, test, web, App};
+    use actix_web::{test, web, App};
     use hex::encode;
     use sha2::Sha256;
-    use std::io::Write;
-    use tempfile::NamedTempFile;
-
-    #[actix_rt::test]
-    #[ignore]
-    async fn test_file_upload_and_retrieval() {
-        let app = test::init_service(
-            App::new()
-                .app_data(web::Data::new(AppState {
-                    file_map: Mutex::new(HashMap::new()),
-                    secret_key: "test-test-super-long-super-secret-unique-key-goes-here"
-                        .to_string(),
-                }))
-                .service(web::resource("/upload").route(web::post().to(upload_file)))
-                .service(web::resource("/files/{id}").route(web::get().to(get_file))),
-        )
-        .await;
-
-        let mut temp_file = NamedTempFile::new().unwrap();
-        writeln!(temp_file, "Not much of a message history bundle yet.").unwrap();
-
-        // Read the file's contents into a Vec<u8>
-        let file_contents = std::fs::read(temp_file.path()).unwrap();
-        let payload = web::Bytes::from(file_contents);
-
-        // Create the request with the file's bytes as the payload
-        let req = test::TestRequest::post()
-            .uri("/upload")
-            .set_payload(payload)
-            .to_request();
-
-        let resp = test::call_service(&app, req).await;
-        assert!(resp.status().is_success());
-
-        // Extract the file ID from the response
-        let body = to_bytes(resp.into_body()).await.unwrap();
-        let file_id_str = std::str::from_utf8(&body).unwrap();
-        let file_id = Uuid::parse_str(file_id_str).unwrap();
-
-        // Attempt to retrieve the file using its ID
-        let req = test::TestRequest::get()
-            .uri(&format!("/files/{}", file_id))
-            .to_request();
-        let resp = test::call_service(&app, req).await;
-
-        assert!(resp.status().is_success());
-    }
 
+    const SECRET_KEY: &[u8] = b"TEST_SECRET_KEY";
+    
     // Helper function to create a HMAC signature
     fn create_hmac_signature(secret_key: &[u8], data: &[u8]) -> String {
         let mut mac =
@@ -187,12 +148,13 @@ mod tests {
     // Tests the HMAC verification logic
     #[actix_rt::test]
     async fn test_hmac_verification() {
-        let secret_key = b"your-secret-key";
         let app = test::init_service(App::new().route(
             "/test",
-            web::post().to(|req: HttpRequest, body: web::Bytes| async {
+            web::post().to(|req: HttpRequest, body: web::Bytes| async move {
                 // Attempt to verify the HMAC
-                match verify_hmac(&req, &body, &secret_key) {
+                let req = req.clone();
+                let body = body.clone();
+                match verify_hmac(&req, &body, SECRET_KEY) {
                     Ok(_) => HttpResponse::Ok().finish(),
                     Err(err) => err,
                 }
@@ -204,7 +166,7 @@ mod tests {
         let incorrect_payload = b"incorrect payload";
 
         // Create a correct HMAC for the correct payload
-        let correct_hmac = create_hmac_signature(secret_key, correct_payload);
+        let correct_hmac = create_hmac_signature(SECRET_KEY, correct_payload);
 
         // Simulate sending a request with the correct HMAC
         let req = test::TestRequest::post()
@@ -220,7 +182,7 @@ mod tests {
         );
 
         // Create an incorrect HMAC for the purpose of testing
-        let incorrect_hmac = create_hmac_signature(secret_key, incorrect_payload);
+        let incorrect_hmac = create_hmac_signature(SECRET_KEY, incorrect_payload);
 
         // Simulate sending a request with the incorrect HMAC
         let req = test::TestRequest::post()