Fix CI

Author: thombashi

.github/workflows/tests.yml

@@ -53,7 +53,7 @@ jobs:
         if: matrix.os == 'windows-latest'
         env:
           PYTEST_DISCORD_WEBHOOK: ${{ secrets.PYTEST_DISCORD_WEBHOOK }}
-        run: tox -e py -- --discord-verbose=0
+        run: tox -e py
 
       - name: Upload coverage report
         if: matrix.os == 'ubuntu-latest' && matrix.python-version == '3.8'