tracks/python/exercises/scale-generator/example.py in trackler-2.2.1.13 vs tracks/python/exercises/scale-generator/example.py in trackler-2.2.1.14

@@ -24,9 +24,11 @@
         pitches = []
         scale = self._reorder_chromatic_scale()
         for i, interval in enumerate(self.pattern):
             pitches.append(scale[last_index])
             last_index += self.ASCENDING_INTERVALS.index(interval) + 1
+        if pitches[0] != scale[last_index % len(scale)]:
+            raise ValueError()
         return pitches
 
     def _reorder_chromatic_scale(self):
         index = self.chromatic_scale.index(self.tonic)
         return self.chromatic_scale[index:] + self.chromatic_scale[:index]