diff --git a/src/test/java/org/example/AdministrationTest.java b/src/test/java/org/example/AdministrationTest.java
index fcb0955..3e07fe7 100644
--- a/src/test/java/org/example/AdministrationTest.java
+++ b/src/test/java/org/example/AdministrationTest.java
@@ -107,7 +107,48 @@ class AdministrationTest {
         assertEquals("Jane Doe", result.getName(), "The name of the found admin should match.");
     }
 
+    @Test
+    void findAdminByIdTest() {
+        Administration administration = new Administration();
+        Admin admin = new Admin("John Doe", "A2002", "Admin");
+        administration.addAdmin(admin);
+
+        Admin result = administration.findAdminById("A2002");
+        assertNotNull(result, "Admin should be found by ID.");
+        assertEquals("A2002", result.getId(), "The ID should match the one searched for.");
+    }
+
+    @Test
+    void addStudentTest() {
+        Administration administration = new Administration();
+        Student student = new Student("Alice", "S1001", "Student");
+
+        // Initially, no student should be found
+        assertNull(administration.findStudentById("S1001"));
 
+        // Add the student
+        administration.addStudents(student);
+
+        // Now, the student should be found
+        assertNotNull(administration.findStudentById("S1001"));
+        assertEquals("Alice", administration.findStudentById("S1001").getName());
+    }
+
+    @Test
+    void deleteStudentTest() {
+        Administration administration = new Administration();
+        Student student = new Student("Bob", "S1002", "Student");
+
+        // Add the student and verify they're added
+        administration.addStudents(student);
+        assertNotNull(administration.findStudentById("S1002"));
+
+        // Delete the student
+        assertTrue(administration.deleteStudents("S1002"));
+
+        // Verify the student is no longer found
+        assertNull(administration.findStudentById("S1002"));
+    }
 
     /**
      * Test case for the addCourse method.