SchemaProps: spec.SchemaProps{
					Type: []string{"object"},
					Properties: map[string]spec.Schema{
						"bar": *spec.StringProperty(),
					},
				},
			},
			assertions: []assertionFunc{
				toHaveFieldRef("spec.validations[0].expression"),
				toContain(`undefined field 'foo'`),
			},
		},
		{
			name:   "field type mismatch",
			policy: deploymentPolicy,
			schemaToReturn: &spec.Schema{