diff --git a/src/employee_interface.rs b/src/employee_interface.rs
index 9ef157e..d6ab172 100644
--- a/src/employee_interface.rs
+++ b/src/employee_interface.rs
@@ -1,21 +1,28 @@
 #[derive(Debug)]
 pub struct Employee {
-    name: &str,
-    department: &str,
+    name: String,
+    department: String,
 }
 
 impl Employee {
     pub fn new(name: &str, department: &str) -> Self {
-        self::Employee { name, department }
+        self::Employee {
+            name: name.to_string(),
+            department: department.to_string(),
+        }
     }
 }
 
+pub struct Employees {
+    employees: Vec<Employee>,
+}
+
 #[cfg(test)]
-use super::*;
-
 mod test {
+    use super::*;
+
     #[test]
     fn new_employee() {
-        println!(Employee::new("Amir", "Sales"))
+        println!("{:?}", Employee::new("Amir", "Sales"))
     }
 }