python runtime_error ai_generated true

AssertionError: assert 0 == 3 # 单独运行时通过，完整套件运行时失败

AssertionError: assert 0 == 3 # passes when run alone, fails in full suite

ID: python/pytest-test-order-dependency-flaky

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80%修复率
85%置信度
0证据数
2024-12-05首次发现

版本兼容性

版本状态引入弃用备注
7.x active — — —
8.x active — — —

根因分析

测试共享模块级或数据库状态并依赖执行顺序。前面的测试修改了全局状态（例如注册表字典），后续测试假设它是干净的，因此单独运行通过但完整运行失败。

English

Tests share module-level or database state and depend on execution order. A prior test mutates global state (e.g., a registry dict) that a later test assumes is pristine, so the test passes in isolation but fails in the full run.

generic

解决方案

  1. 93% 成功率 
    @pytest.fixture(autouse=True)
def reset_registry():
    registry.clear()
    yield
    registry.clear()
  2. 90% 成功率 
    @pytest.fixture
def app():
    return App()  # fresh per test

无效尝试

常见但无效的做法:

  1. 60% 失败

    Disabling random ordering makes the order fixed but does not remove the shared-state dependency; it just hides it under one deterministic order.

  2. 70% 失败

    Reruns may eventually pass but the underlying state leak persists and slows the suite.