for _, err := range errs {
			expectedErr, ok := tc.expectedErrs[err.Field]
			if !ok {
				t.Errorf("%s: unexpected err on field %s: %v", k, err.Field, err)
				continue
			}
			if !strings.Contains(err.Error(), expectedErr) {
				t.Errorf("%s: expected err on field %s to contain '%s', was %v", k, err.Field, expectedErr, err.Error())
				continue
			}
		}