diff --git a/crates/tuono/tests/cli_tests.rs b/crates/tuono/tests/cli_tests.rs
index fb2fe228..cce8a474 100644
--- a/crates/tuono/tests/cli_tests.rs
+++ b/crates/tuono/tests/cli_tests.rs
@@ -4,6 +4,9 @@ use serial_test::serial;
 use std::fs;
 use utils::TempTuonoProject;
 
+const POST_API_FILE: &str = r"#[tuono_lib::api(POST)]";
+const GET_API_FILE: &str = r"#[tuono_lib::api(GET)]";
+
 #[test]
 #[serial]
 fn it_successfully_create_the_index_route() {
@@ -30,3 +33,65 @@ fn it_successfully_create_the_index_route() {
         r#".route("/", get(index::route)).route("/__tuono/data/data.json", get(index::api))"#
     ));
 }
+
+#[test]
+#[serial]
+fn it_successfully_create_an_api_route() {
+    let temp_tuono_project = TempTuonoProject::new();
+
+    temp_tuono_project.add_api("./src/routes/api/health_check.rs", POST_API_FILE);
+
+    let mut test_tuono_build = Command::cargo_bin("tuono").unwrap();
+    test_tuono_build
+        .arg("build")
+        .arg("--no-js-emit")
+        .assert()
+        .success();
+
+    let temp_main_rs_path = temp_tuono_project.path().join(".tuono/main.rs");
+
+    let temp_main_rs_content =
+        fs::read_to_string(&temp_main_rs_path).expect("Failed to read '.tuono/main.rs' content.");
+
+    dbg!(&temp_main_rs_content);
+
+    assert!(temp_main_rs_content.contains(r#"#[path="../src/routes/api/health_check.rs"]"#));
+    assert!(temp_main_rs_content.contains("mod api_health_check;"));
+
+    assert!(temp_main_rs_content.contains(
+        r#".route("/api/health_check", post(api_health_check::post__tuono_internal_api))"#
+    ));
+}
+
+#[test]
+#[serial]
+fn it_successfully_create_multiple_api_for_the_same_file() {
+    let temp_tuono_project = TempTuonoProject::new();
+
+    temp_tuono_project.add_api(
+        "./src/routes/api/health_check.rs",
+        &format!("{POST_API_FILE}{GET_API_FILE}"),
+    );
+
+    let mut test_tuono_build = Command::cargo_bin("tuono").unwrap();
+    test_tuono_build
+        .arg("build")
+        .arg("--no-js-emit")
+        .assert()
+        .success();
+
+    let temp_main_rs_path = temp_tuono_project.path().join(".tuono/main.rs");
+
+    let temp_main_rs_content =
+        fs::read_to_string(&temp_main_rs_path).expect("Failed to read '.tuono/main.rs' content.");
+
+    assert!(temp_main_rs_content.contains(r#"#[path="../src/routes/api/health_check.rs"]"#));
+    assert!(temp_main_rs_content.contains("mod api_health_check;"));
+
+    assert!(temp_main_rs_content.contains(
+        r#".route("/api/health_check", post(api_health_check::post__tuono_internal_api))"#
+    ));
+    assert!(temp_main_rs_content.contains(
+        r#".route("/api/health_check", get(api_health_check::get__tuono_internal_api))"#
+    ));
+}
diff --git a/crates/tuono/tests/utils.rs b/crates/tuono/tests/utils.rs
index fa4df874..f46ceb52 100644
--- a/crates/tuono/tests/utils.rs
+++ b/crates/tuono/tests/utils.rs
@@ -1,6 +1,7 @@
 use fs_extra::dir::create_all;
 use std::env;
 use std::fs::File;
+use std::io::Write;
 use std::path::{Path, PathBuf};
 use tempfile::{tempdir, TempDir};
 
@@ -36,6 +37,19 @@ impl TempTuonoProject {
         .expect("Failed to create parent route directory");
         File::create(path).expect("Failed to create the route file");
     }
+
+    pub fn add_api<'a>(&self, path: &'a str, content: &'a str) {
+        let path = PathBuf::from(path);
+        create_all(
+            path.parent().expect("Route path does not have any parent"),
+            false,
+        )
+        .expect("Failed to create parent route directory");
+
+        let mut file = File::create(path).expect("Failed to create the route file");
+        file.write_all(content.as_bytes())
+            .expect("Failed to write into API file");
+    }
 }
 
 impl Drop for TempTuonoProject {