def METHOD_NAME(self):
    key, value = "foo", "bar"
    project = self.create_project()
    event = self.store_event(
        data={"tags": {key: value}, "timestamp": iso_format(before_now(seconds=1))},
        project_id=project.id,
    )
    group = event.group
    self.login_as(user=self.user)
    url = f"/api/0/issues/{group.id}/tags/{key}/values/"
    response = self.client.get(url)
    assert response.status_code == 200
    assert len(response.data) == 1
    assert response.data[0]["value"] == "bar"