diff --git a/tests/test_main.py b/tests/test_main.py
index a07a869..779921d 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -11,12 +11,32 @@ class TestDrawProgressBar(unittest.TestCase):
     """Tests the DrawProgressBar function"""
 
     @patch.dict(os.environ, {'INPUT_PROGRESS_BAR_CHAR_LENGTH': '30',
-     'INPUT_EMPTY_BAR': '░', 'INPUT_FILLED_BAR': '█'})
+     'INPUT_EMPTY_BAR': '░', 'INPUT_FILLED_BAR': '█'}, clear=True)
     def test_draw_progress_bar(self):
         """Tests drawing the progress bar"""
+
         progress_bar: str = draw_progress_bar(20)
         expected_progress_bar: str = "██████░░░░░░░░░░░░░░░░░░░░░░░░"
+        self.assertEqual(progress_bar, expected_progress_bar)
+
+        progress_bar: str = draw_progress_bar(20.25)
+        self.assertEqual(progress_bar, expected_progress_bar)
+
+        progress_bar: str = draw_progress_bar(100)
+        expected_progress_bar: str = "██████████████████████████████"
+        self.assertEqual(progress_bar, expected_progress_bar)
+
+        progress_bar: str = draw_progress_bar(200)
+        self.assertEqual(progress_bar, expected_progress_bar)
+
+        progress_bar: str = draw_progress_bar(0)
+        expected_progress_bar: str = "░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░"
+        self.assertEqual(progress_bar, expected_progress_bar)
+
+        progress_bar: str = draw_progress_bar(-10)
+        self.assertEqual(progress_bar, expected_progress_bar)
 
+        progress_bar: str = draw_progress_bar(-0)
         self.assertEqual(progress_bar, expected_progress_bar)
 
 if __name__ == '__main__':