diff --git a/api/utils/tests/test_valid_schedule.py b/api/utils/tests/test_valid_schedule.py
new file mode 100644
index 0000000..7aa19d2
--- /dev/null
+++ b/api/utils/tests/test_valid_schedule.py
@@ -0,0 +1,59 @@
+from django.test import TestCase
+from unittest.mock import Mock, patch
+from utils.schedule_generator import ScheduleGenerator
+from api.models import Class
+
+
+class ScheduleGeneratorTestCase(TestCase):
+    @patch('schedules.schedule_generator.get_class_by_id')
+    def setUp(self, mock_get_class_by_id):
+        self.mock_class1 = Mock(spec=Class)
+        self.mock_class1.schedule = "MT123"
+        self.mock_class1.discipline = "Math"
+        self.mock_class1.id = "FGA0456"
+
+        self.mock_class2 = Mock(spec=Class)
+        self.mock_class2.schedule = "MT123"
+        self.mock_class2.discipline = "Science"
+        self.mock_class2.id = "FGA0123"
+
+        mock_get_class_by_id.side_effect = [self.mock_class1, self.mock_class2]
+
+        self.generator = ScheduleGenerator(
+            classes_id=[self.mock_class1.id, self.mock_class2.id], preference=[1, 2, 3])
+
+    def test_ct1_exception_class(self):
+        # CT1: Teste de saída da matéria de exceção
+        schedule = (self.mock_class1.id,)
+        except_class = self.mock_class1
+        result = self.generator._valid_schedule(schedule, except_class)
+        self.assertTrue(result)
+
+    def test_ct2_common_class(self):
+        # CT2: Teste de saída de matéria comum
+        schedule = (self.mock_class2.id,)
+        result = self.generator._valid_schedule(schedule)
+        self.assertTrue(result)
+
+    def test_ct3_same_schedule(self):
+        # CT3: Teste de matérias com o mesmo horário
+        schedule = (self.mock_class1.id, self.mock_class2.id)
+        except_class = None
+        self.generator.schedule_info[self.mock_class1.schedule]["times"] = {
+            ('M', 'T', '1', '2', '3')}
+        self.generator.schedule_info[self.mock_class2.schedule]["times"] = {
+            ('M', 'T', '1', '2', '3')}
+        result = self.generator._valid_schedule(schedule, except_class)
+        self.assertFalse(result)
+
+    def test_ct4_same_schedule_except(self):
+        # CT4: Teste de matérias com o mesmo horário, com uma classe de exceção
+        schedule = (self.mock_class1.id, self.mock_class2.id)
+        except_class = Mock(spec=Class)
+        except_class.schedule = "XYZ123"
+        self.generator.schedule_info[self.mock_class1.schedule]["times"] = {
+            ('M', 'T', '1', '2', '3')}
+        self.generator.schedule_info[self.mock_class2.schedule]["times"] = {
+            ('M', 'T', '1', '2', '3')}
+        result = self.generator._valid_schedule(schedule, except_class)
+        self.assertFalse(result)