CI test FastApi fails on FastApi versions > 0.70.1 with Interrupted: 3 errors during collection

[aleksul]

Checks

• I added a descriptive title to this issue
• I have searched (google, github) for similar issues and couldn't find anything
• I have read and followed the docs and still think this is a bug

Bug

Output of python -c "import pydantic.utils; print(pydantic.utils.version_info())":

I have installed locally, just to reproduce CI failure.

pydantic version: 1.9.0
pydantic compiled: False
   install path: /home/aleks/Projects/pydantic/pydantic
 python version: 3.7.12 (default, Jan 17 2022, 13:14:20)  [GCC 9.3.0]
       platform: Linux-5.10.16.3-microsoft-standard-WSL2-x86_64-with-debian-bullseye-sid
optional deps. installed: ['devtools', 'dotenv', 'email-validator', 'typing-extensions']

Output of pytest:

Test session starts (platform: linux, Python 3.7.12, pytest 6.2.5, pytest-sugar 0.9.4)
rootdir: /home/aleks/Projects/pydantic/fastapi, configfile: pyproject.toml
plugins: sugar-0.9.4, mock-3.6.1, cov-3.0.0, hypothesis-6.31.6, anyio-3.5.0
collecting ...
―――――――――――――――――――――――――――― ERROR collecting docs_src/app_testing/app_b_py310/test_main.py ―――――――――――――――――――――――――――――
docs_src/app_testing/app_b_py310/test_main.py:3: in <module>
    from .main import app
docs_src/app_testing/app_b_py310/main.py:14: in <module>
    class Item(BaseModel):
docs_src/app_testing/app_b_py310/main.py:17: in Item
    description: str | None = None
E   TypeError: unsupported operand type(s) for |: 'type' and 'NoneType'

―――――――――――――――――――――― ERROR collecting docs_src/sql_databases/sql_app_py310/tests/test_sql_app.py ――――――――――――――――――――――
docs_src/sql_databases/sql_app_py310/tests/test_sql_app.py:6: in <module>
    from ..main import app, get_db
docs_src/sql_databases/sql_app_py310/main.py:4: in <module>
    from . import crud, models, schemas
docs_src/sql_databases/sql_app_py310/crud.py:3: in <module>
    from . import models, schemas
docs_src/sql_databases/sql_app_py310/schemas.py:4: in <module>
    class ItemBase(BaseModel):
docs_src/sql_databases/sql_app_py310/schemas.py:6: in ItemBase
    description: str | None = None
E   TypeError: unsupported operand type(s) for |: 'type' and 'NoneType'

―――――――――――――――――――――― ERROR collecting docs_src/sql_databases/sql_app_py39/tests/test_sql_app.py ―――――――――――――――――――――――
docs_src/sql_databases/sql_app_py39/tests/test_sql_app.py:6: in <module>
    from ..main import app, get_db
docs_src/sql_databases/sql_app_py39/main.py:4: in <module>
    from . import crud, models, schemas
docs_src/sql_databases/sql_app_py39/crud.py:3: in <module>
    from . import models, schemas
docs_src/sql_databases/sql_app_py39/schemas.py:31: in <module>
    class User(UserBase):
docs_src/sql_databases/sql_app_py39/schemas.py:34: in User
    items: list[Item] = []
E   TypeError: 'type' object is not subscriptable

================================================ short test summary info ================================================
FAILED docs_src/app_testing/app_b_py310/test_main.py - TypeError: unsupported operand type(s) for |: 'type' and 'NoneT...
FAILED docs_src/sql_databases/sql_app_py310/tests/test_sql_app.py - TypeError: unsupported operand type(s) for |: 'typ...
FAILED docs_src/sql_databases/sql_app_py39/tests/test_sql_app.py - TypeError: 'type' object is not subscriptable
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Interrupted: 3 errors during collection !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Example

https://github.com/aleksul/pydantic/runs/4840835092?check_suite_focus=true

I've exported logs because github will delete them after some time:
test fastAPI.txt

[dolfinus]

Fixed in #3690

[PrettyWood]

Indeed thanks @dolfinus