diff --git a/backend/app/students/routes/enrollments.py b/backend/app/students/routes/enrollments.py
index a46e26b..196376f 100644
--- a/backend/app/students/routes/enrollments.py
+++ b/backend/app/students/routes/enrollments.py
@@ -1,6 +1,7 @@
 from apiflask import APIBlueprint
 from flask import abort
 
+from ...base.mode import EnrollmentsMode
 from ...base.schemas import MessageSchema
 from ...dependencies import db
 from ...examination_schedule.models import ExaminationSchedule
@@ -38,14 +39,17 @@ def assign_your_group_to_term_of_defence(
     if term_of_defence is None or (ex := term_of_defence.examination_schedule) is None:
         abort(400, "Term of defence not found!")
 
-    g = (
+    if ex.open_enrollments != EnrollmentsMode.OPEN.value:
+        abort(400, "Enrollments is closed! You have been delayed!")
+
+    group = (
         Group.query.join(ProjectSupervisor)
         .filter(Group.year_group_id == ex.year_group_id)
         .join(Group.students)
         .filter_by(index=student.index)
         .first()
     )
-    if g is None or g.project_supervisor is None:
+    if group is None or group.project_supervisor is None:
         abort(
             400,
             "You don't have a group or your group doesn't"
@@ -53,7 +57,7 @@ def assign_your_group_to_term_of_defence(
         )
 
     defence = TermOfDefence.query.filter(
-        TermOfDefence.group_id == g.id,
+        TermOfDefence.group_id == group.id,
         TermOfDefence.examination_schedule_id == examination_schedule_id,
     ).first()
     if defence is not None:
@@ -61,14 +65,14 @@ def assign_your_group_to_term_of_defence(
 
     td = (
         TermOfDefence.query.join(TermOfDefence.members_of_committee)
-        .filter_by(id=g.project_supervisor_id)
+        .filter_by(id=group.project_supervisor_id)
         .first()
     )
 
     if td is None:
         abort(400, "Your project supervisor is not in committee!")
 
-    term_of_defence.group_id = g.id
+    term_of_defence.group_id = group.id
     db.session.add(term_of_defence)
     db.session.commit()
     return {"message": "You have just assigned the group for this exam date!"}
diff --git a/backend/tests/functional_tests/coordinator/test_enrollments.py b/backend/tests/functional_tests/coordinator/test_enrollments.py
new file mode 100644
index 0000000..e69de29
diff --git a/backend/tests/functional_tests/project_supervisors/test_project_grade_sheet.py b/backend/tests/functional_tests/project_supervisors/test_project_grade_sheet.py
new file mode 100644
index 0000000..e69de29
diff --git a/backend/tests/functional_tests/students/test_project_grade_sheet.py b/backend/tests/functional_tests/students/test_project_grade_sheet.py
new file mode 100644
index 0000000..e69de29