diff --git a/exercises/isbn-verifier/isbn_verifier_test.py b/exercises/isbn-verifier/isbn_verifier_test.py
index 1cee1d4de3..8d14c9ff55 100644
--- a/exercises/isbn-verifier/isbn_verifier_test.py
+++ b/exercises/isbn-verifier/isbn_verifier_test.py
@@ -3,7 +3,7 @@
 from isbn_verifier import verify
 
 
-# Tests adapted from `problem-specifications//canonical-data.json` @ v2.4.0
+# Tests adapted from `problem-specifications//canonical-data.json` @ v2.7.0
 
 class IsbnVerifierTest(unittest.TestCase):
 
@@ -37,12 +37,12 @@ def test_invalid_isbn_without_check_digit_and_dashes(self):
     def test_invalid_too_long_isbn_with_no_dashes(self):
         self.assertIs(verify('3598215078X'), False)
 
+    def test_invalid_too_short_isbn(self):
+        self.assertIs(verify('00'), False)
+
     def test_invalid_isbn_without_check_digit(self):
         self.assertIs(verify('3-598-21507'), False)
 
-    def test_invalid_too_long_isbn(self):
-        self.assertIs(verify('3-598-21507-XX'), False)
-
     def test_invalid_check_digit_X_used_for_0(self):
         self.assertIs(verify('3-598-21515-X'), False)
 
@@ -52,6 +52,12 @@ def test_valid_empty_isbn(self):
     def test_input_is_nine_characters(self):
         self.assertIs(verify('134456729'), False)
 
+    def test_invalid_characters_are_not_ignored(self):
+        self.assertIs(verify('3132P34035'), False)
+
+    def test_input_is_too_long_but_contains_a_valid_isbn(self):
+        self.assertIs(verify('98245726788'), False)
+
 
 if __name__ == '__main__':
     unittest.main()