diff --git a/backend/tests/test_equivalence_class_exercise.py b/backend/tests/test_equivalence_class_exercise.py
index 5a3004a..ca61462 100644
--- a/backend/tests/test_equivalence_class_exercise.py
+++ b/backend/tests/test_equivalence_class_exercise.py
@@ -1,48 +1,58 @@
 """
 TC_001 - Equivalence class test for the limit of sets in an exercise
 """
-from django.test import TestCase
-from workouts.models import ExerciseInstance
+import pytest
+from rest_framework.test import APIClient
+from django.utils.timezone import now
+from workouts.models import Workout
+from django.contrib.auth import get_user_model
 
-# Test an exercise instance with the lowest equivalence class
-def test_create_below_exercise_instance(self):
-  response = self.client.post("api/exercise-instances/",
-    "workout": "Full body toning",
-    "exercise": "Squats",
-    "sets": -10, # A negative number of sets is expected to raise an error
-    "number": 5
-  }, format="json")
+@pytest.mark.django_db
+class TestWorkoutAPI:
+  def setUp(self):
+    self.client = APIClient()
+    self.user = get_user_model().objects.create_user(username="testuser", password="password")
+    self.client.force_authenticate(self.user)
 
-  print(f"Error response data: {response.data}")
-  print(f"Error response status code: {response.status_code}")
-
-  assert response.status_code == 400
-    
-# Test an exercise instance with the mid and valid equivalence class
-def test_create_valid_exercise_instance(self):
-  response = self.client.post("/api/exercise-instances/", {
-    "workout": "Full body toning",
-    "exercise": "Squats",
-    "sets": 50, # A number of sets between 0 and 100 is expected to be valid
-    "number": 5
-  }, format="json")
-    
-  print(f"Response data: {response.data}")
-  print(f"Response status code: {response.status_code}")
-
-  assert response.status_code == 201
-  assert ExerciseInstance.objects.count() == 1
-
-# Test an exercise instance with the highest equivalence class
-def test_create_below_exercise_instance(self):
-  response = self.client.post("api/exercise-instances/", {
-    "workout": "Full body toning",
-    "exercise": "Squats",
-    "sets": 110, # A number of sets above 100 is expected to raise an error
-    "number": 5
-  }, format="json")
-
-  print(f"Error response data: {response.data}")
-  print(f"Error response status code: {response.status_code}")
-
-  assert response.status_code == 400
+  # Test an exercise instance with the lowest equivalence class
+  def test_create_below_exercise_instance(self):
+    response = self.client.post("api/exercise-instances/",
+      "workout": "Full body toning",
+      "exercise": "Squats",
+      "sets": -10, # A negative number of sets is expected to raise an error
+      "number": 5
+    }, format="json")
+  
+    print(f"Error response data: {response.data}")
+    print(f"Error response status code: {response.status_code}")
+  
+    assert response.status_code == 400
+      
+  # Test an exercise instance with the mid and valid equivalence class
+  def test_create_valid_exercise_instance(self):
+    response = self.client.post("/api/exercise-instances/", {
+      "workout": "Full body toning",
+      "exercise": "Squats",
+      "sets": 50, # A number of sets between 0 and 100 is expected to be valid
+      "number": 5
+    }, format="json")
+      
+    print(f"Response data: {response.data}")
+    print(f"Response status code: {response.status_code}")
+  
+    assert response.status_code == 201
+    assert ExerciseInstance.objects.count() == 1
+  
+  # Test an exercise instance with the highest equivalence class
+  def test_create_below_exercise_instance(self):
+    response = self.client.post("api/exercise-instances/", {
+      "workout": "Full body toning",
+      "exercise": "Squats",
+      "sets": 110, # A number of sets above 100 is expected to raise an error
+      "number": 5
+    }, format="json")
+  
+    print(f"Error response data: {response.data}")
+    print(f"Error response status code: {response.status_code}")
+  
+    assert response.status_code == 400