diff --git a/tests/test_api.py b/tests/test_api.py
index 42c99ae1927b8e450310b6c8560ccd10cee5ed06..8127b8e43a777bdc20235bbb2ec1809b36129696 100644
--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -30,6 +30,17 @@ def add_test_data():
     db.session.commit()
 
 
+def delete_test_data():
+    db.session.query(Exam).delete()
+    db.session.commit()
+
+    db.session.query(Problem).delete()
+    db.session.commit()
+
+    db.session.query(ProblemWidget).delete()
+    db.session.commit()
+
+
 @pytest.fixture()
 def app():
     app = Flask(__name__, static_folder=None)