diff --git a/backend/requirements.txt b/backend/requirements.txt
index f5118a9a..943fb75a 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -2,4 +2,4 @@ flask
 flask-restful
 flask-sqlalchemy
 python-dotenv
-psycopg2-binary
+psycopg2-binary
\ No newline at end of file
diff --git a/backend/tests/models/conftest.py b/backend/tests/models/conftest.py
index f1156863..64e4461c 100644
--- a/backend/tests/models/conftest.py
+++ b/backend/tests/models/conftest.py
@@ -98,7 +98,6 @@ def valid_project(course):
         title="Project",
         descriptions="Test project",
         deadline=deadline,
-        course_id=course.course_id,
         visible_for_students=True,
         archieved=False,
     )
diff --git a/backend/tests/models/course_test.py b/backend/tests/models/course_test.py
index 159bc86a..039f024f 100644
--- a/backend/tests/models/course_test.py
+++ b/backend/tests/models/course_test.py
@@ -1,5 +1,6 @@
 import pytest
 from sqlalchemy.exc import IntegrityError
+from psycopg2.errors import ForeignKeyViolation
 from project.models.courses import Courses
 from project.models.users import Users
 from project.models.course_relations import CourseAdmins, CourseStudents
@@ -11,8 +12,7 @@ class TestCoursesModel:
     def test_foreignkey_courses_teacher(self, db_session, course: Courses):
         """Tests the foreign key relation between courses and the teacher uid"""
         with pytest.raises(
-            IntegrityError,
-            match="Courses should throw a foreign key error on the teacher uid",
+            IntegrityError
         ):
             db_session.add(course)
             db_session.commit()
@@ -40,8 +40,7 @@ def test_foreignkey_coursestudents_uid(
         db_session.commit()
 
         with pytest.raises(
-            IntegrityError,
-            match="Course_relations should throw a foreign key error on the student uid",
+            IntegrityError
         ):
             db_session.add_all(course_students_relation)
             db_session.commit()
@@ -66,6 +65,8 @@ def test_correct_courserelations(
         db_session.add_all(course_students)
         db_session.commit()
 
+        for s in course_students_relation:
+            s.course_id = course.course_id
         db_session.add_all(course_students_relation)
         db_session.commit()
 
@@ -80,7 +81,7 @@ def test_correct_courserelations(
 
         db_session.add(assistent)
         db_session.commit()
-
+        course_admin.course_id = course.course_id
         db_session.add(course_admin)
         db_session.commit()
 
diff --git a/backend/tests/models/projects_and_submissions_test.py b/backend/tests/models/projects_and_submissions_test.py
index 1cbaa0ae..e79eaf93 100644
--- a/backend/tests/models/projects_and_submissions_test.py
+++ b/backend/tests/models/projects_and_submissions_test.py
@@ -13,6 +13,7 @@ def test_deadline(self,db_session,course,course_teacher,valid_project,valid_user
         db_session.commit()
         db_session.add(course)
         db_session.commit()
+        valid_project.course_id = course.course_id
         db_session.add(valid_project)
         db_session.commit()
         check_project = (
@@ -40,8 +41,7 @@ def test_deadline(self,db_session,course,course_teacher,valid_project,valid_user
         assert submission_check.uid == valid_user.uid
 
         with pytest.raises(
-            IntegrityError,
-            match="Submissions model should throw an error on grades out of [0,20] range",
+            IntegrityError
         ):
             submission_check.grading = 100
             db_session.commit()