TEST: Improve test naming for tracking down failures

Author: effigies

nibabel/tests/test_api_validators.py

@@ -19,7 +19,7 @@ def meth(self):
                 for imaker, params in self.obj_params():
                     validator(self, imaker, params)
             meth.__name__ = 'test_' + name[len('validate_'):]
-            meth.__doc__ = 'autogenerated test from ' + name
+            meth.__doc__ = 'autogenerated test from {}.{}'.format(klass.__name__, name)
             return meth
         for name in dir(klass):
             if not name.startswith('validate_'):