Try removing echo command from win test script
@@ -39,7 +39,7 @@ test:
commands:
- pip check
- jupyter nbextension enable ipydatetime/extension; echo $? # [unix]
- - jupyter nbextension enable ipydatetime/extension; echo %ERRORLEVEL% # [win]
+ - jupyter nbextension enable ipydatetime/extension # [win]
requires:
- notebook
- pip
