diff --git a/buisnesslogic/src/main/java/com/plannaplan/services/CourseService.java b/buisnesslogic/src/main/java/com/plannaplan/services/CourseService.java
index 446faea..15ae1aa 100644
--- a/buisnesslogic/src/main/java/com/plannaplan/services/CourseService.java
+++ b/buisnesslogic/src/main/java/com/plannaplan/services/CourseService.java
@@ -25,6 +25,10 @@ public class CourseService {
         this.repo.save(course);
     }
 
+    public void delete(Course course){
+        this.repo.delete(course);
+    }
+
     public int getCoursesAmmount(){
         return (int)this.repo.count();
     }
diff --git a/buisnesslogic/src/main/java/com/plannaplan/services/GroupService.java b/buisnesslogic/src/main/java/com/plannaplan/services/GroupService.java
index e899dd8..3142411 100644
--- a/buisnesslogic/src/main/java/com/plannaplan/services/GroupService.java
+++ b/buisnesslogic/src/main/java/com/plannaplan/services/GroupService.java
@@ -28,6 +28,10 @@ public class GroupService {
         this.repo.save(group);
     }
 
+    public void delete(Groups groups){
+        this.repo.delete(groups);
+    }
+
     public int getGroupsAmmount(){
         return (int)this.repo.count();
     }
diff --git a/buisnesslogic/src/main/java/com/plannaplan/services/LecturerService.java b/buisnesslogic/src/main/java/com/plannaplan/services/LecturerService.java
index 650fd42..d02548a 100644
--- a/buisnesslogic/src/main/java/com/plannaplan/services/LecturerService.java
+++ b/buisnesslogic/src/main/java/com/plannaplan/services/LecturerService.java
@@ -19,6 +19,10 @@ public class LecturerService {
         repo.save(lecturer);
     }
 
+    public void delete(Lecturer lecturer) {
+        repo.delete(lecturer);
+    }
+
     public int getLecturersAmmount(){
         return (int)this.repo.count();
     }
diff --git a/buisnesslogic/src/test/java/com/plannaplan/services/CourseServiceTest.java b/buisnesslogic/src/test/java/com/plannaplan/services/CourseServiceTest.java
new file mode 100644
index 0000000..10a609f
--- /dev/null
+++ b/buisnesslogic/src/test/java/com/plannaplan/services/CourseServiceTest.java
@@ -0,0 +1,37 @@
+package com.plannaplan.services;
+
+import static org.junit.Assert.assertTrue;
+
+import com.plannaplan.entities.Course;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+@ContextConfiguration
+public class CourseServiceTest {
+    @Autowired
+    private CourseService courseService;
+    
+    @Test
+    public void createAndDeleteCourse() {
+        Course course;
+        int startAmmount = this.courseService.getCoursesAmmount();
+
+        // Create course
+        course = new Course();
+        course.setName("Testowy kurs");
+        course.setSymbol("TK");
+        courseService.save(course);
+        assertTrue(this.courseService.getCoursesAmmount() > startAmmount);
+
+        // Delete course
+        courseService.delete(course);
+        assertTrue(this.courseService.getCoursesAmmount() == startAmmount);
+    }
+}
diff --git a/buisnesslogic/src/test/java/com/plannaplan/services/GroupServiceTest.java b/buisnesslogic/src/test/java/com/plannaplan/services/GroupServiceTest.java
new file mode 100644
index 0000000..c6299cb
--- /dev/null
+++ b/buisnesslogic/src/test/java/com/plannaplan/services/GroupServiceTest.java
@@ -0,0 +1,37 @@
+package com.plannaplan.services;
+
+import static org.junit.Assert.assertTrue;
+
+import com.plannaplan.entities.Groups;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+@ContextConfiguration
+public class GroupServiceTest {
+
+    @Autowired
+    private GroupService groupService;
+
+    @Test
+    public void createAndDeleteGroup() {
+        Groups group;
+        int startAmmount = this.groupService.getGroupsAmmount();
+
+        //Create group
+        group = new Groups();
+        group.setRoom("A1");
+        groupService.save(group);
+        assertTrue(this.groupService.getGroupsAmmount() > startAmmount);
+
+        // Delete course
+        groupService.delete(group);
+        assertTrue(this.groupService.getGroupsAmmount() == startAmmount);
+    }
+}
diff --git a/buisnesslogic/src/test/java/com/plannaplan/services/LecturerServiceTest.java b/buisnesslogic/src/test/java/com/plannaplan/services/LecturerServiceTest.java
new file mode 100644
index 0000000..203f03f
--- /dev/null
+++ b/buisnesslogic/src/test/java/com/plannaplan/services/LecturerServiceTest.java
@@ -0,0 +1,38 @@
+package com.plannaplan.services;
+
+import static org.junit.Assert.assertTrue;
+
+import com.plannaplan.entities.Lecturer;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+@ContextConfiguration
+public class LecturerServiceTest {
+    @Autowired
+    private LecturerService lecturerService;
+    
+    @Test
+    public void createAndDeleteLecturer(){
+        Lecturer lecturer;
+        int startAmmount = this.lecturerService.getLecturersAmmount();
+
+        // Create lecturer
+        lecturer = new Lecturer();
+        lecturer.setName("Tomasz");
+        lecturer.setSurname("Kowalski");
+        lecturer.setTitle("prof.");
+        lecturerService.save(lecturer);
+        assertTrue(this.lecturerService.getLecturersAmmount() > startAmmount);
+
+        // Delete lecturer
+        lecturerService.delete(lecturer);
+        assertTrue(this.lecturerService.getLecturersAmmount() == startAmmount);
+    }
+}