diff --git a/tox.ini b/tox.ini
index 723d9382..224e5ef3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -58,7 +58,7 @@ description = Run type checks
 deps =
     .[dev]
 commands =
-    mypy --check-untyped-defs
+    mypy --check-untyped-defs {posargs}
 
 
 [testenv:links]
@@ -98,3 +98,13 @@ commands =
     rm -rf .tox
     rm -rf .ruff_cache
     rm -rf .coverage
+
+
+[testenv:lock]
+description = Update pylock
+skip_install = true
+setenv =
+    PDM_IGNORE_SAVED_PYTHON="1"
+deps = pdm[all]
+commands =
+    pdm lock --update-reuse