diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 494aab710e7..d7a602d5c55 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,9 +1,4 @@
 repos:
-  - repo: https://github.com/asottile/pyupgrade
-    rev: v2.23.1
-    hooks:
-      - id: pyupgrade
-        args: ["--py36-plus"]
 
   - repo: https://github.com/pycqa/isort
     rev: 5.9.3
diff --git a/src/twisted/newsfragments/11700.misc b/src/twisted/newsfragments/11700.misc
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/tox.ini b/tox.ini
index 1be5cc7c3f6..3d97fd83d67 100644
--- a/tox.ini
+++ b/tox.ini
@@ -93,12 +93,12 @@ commands =
     posix: python -c "print('Running on POSIX (no special dependencies)')"
 
     ; Run tests without wrapping them using coverage.
-    nocov: python -m twisted.trial --temp-directory={envtmpdir}/_trial_temp --reporter={env:TRIAL_REPORTER:verbose} {env:TRIAL_ARGS:} {posargs:twisted}
+    nocov: python -m twisted.trial --temp-directory={envtmpdir}/_trial_temp --reporter={env:TRIAL_REPORTER:verbose} {env:TRIAL_ARGS:-j8} {posargs:twisted}
 
     ; Run the tests wrapped using coverage.
     withcov: python {toxinidir}/admin/_copy.py {toxinidir}/admin/zz_coverage.pth {envsitepackagesdir}/zz_coverage.pth
     withcov: coverage erase
-    withcov: coverage run -p --rcfile={toxinidir}/.coveragerc -m twisted.trial --temp-directory={envtmpdir}/_trial_temp --reporter={env:TRIAL_REPORTER:verbose} {env:TRIAL_ARGS:} {posargs:twisted}
+    withcov: coverage run -p --rcfile={toxinidir}/.coveragerc -m twisted.trial --temp-directory={envtmpdir}/_trial_temp --reporter={env:TRIAL_REPORTER:verbose} {env:TRIAL_ARGS:-j8} {posargs:twisted}
 
     lint: pre-commit {posargs:run --all-files --show-diff-on-failure}