**List of steps to reproduce**:
# switch/checkout to rPWBCa2b9ddae
# add `pywikibot.tools.ModuleDeprecationWrapper(__name__)` at the bottom of bot.py
# run `pwb replacebot_tests -v TestReplacementsMain`
**What happens?**:
All 12 tests fails. As the exception shows the pywikibot.bot.ui is not a buffered UI but a Win32UI in Windows machines and I guess an UnixUI for Linux.
```
C:\pwb\GIT\core>pwb replacebot_tests -v TestReplacementsMain
tests: max_retries reduced from 15 to 1
EEEEEEEEEEEE
======================================================================
ERROR: test_cmd_and_fix (__main__.TestReplacementsMain)
Test command line and fix replacements together.
----------------------------------------------------------------------
Traceback (most recent call last):
File ".\tests\replacebot_tests.py", line 74, in setUp
pywikibot.bot.ui.clear()
AttributeError: 'Win32UI' object has no attribute 'clear'
----------------------------------------------------------------------
… < trunctated >
----------------------------------------------------------------------
Ran 12 tests in 2.551s
FAILED (errors=12)
C:\pwb\GIT\core>
```
If using `set_interface('buffer')` the line above, tests will still fail with wrapper (but pass without) due to an empty buffer.
**What should have happened instead?**:
without ModuleDeprecationWrapper tests passes as expected:
```
C:\pwb\GIT\core>pwb replacebot_tests TestReplacementsMain
tests: max_retries reduced from 15 to 1
............
----------------------------------------------------------------------
Ran 12 tests in 2.893s
OK
C:\pwb\GIT\core>
```
The previous commit rPWBC1607677a works fine with and without ModuleDeprecationWrapper