diff --git a/test_team_2.py b/test_team_2.py
index ff0f222..4fb9efb 100644
--- a/test_team_2.py
+++ b/test_team_2.py
@@ -78,6 +78,24 @@ def test_url(self):
 
     def test_uk_nhs(self):
         """Test uk_nhs functionality"""
+        # positive testcases
+        prefix = ['123', '245', '532']
+        mid = ['333', '444', '555']
+        suffix = ['6789', '2232', '4832']
+
+        # Generates a testcase by utting the prefix, mid, and suffix together
+        test_cases = [f"My NHS number is {p}-{m}-{s}" for p in prefix for m in mid for s in suffix]
+
+        for test_string in test_cases:
+            expected = 'My NHS number is <UK_NHS>'
+            actual = anonymize_text(test_string, ['UK_NHS'])
+            self.assertEqual(expected, actual)
+
+        # negative testcase - this will not be replaced
+        test_string = 'My NHS number is 123-456-7890'
+        expected = 'My NHS number is 123-456-7890'
+        actual = anonymize_text(test_string, ['UK_NHS'])
+        self.assertEqual(expected, actual)
 
     def test_it_passport(self):
         """Test it_passport functionality"""