fixes

tox.ini

@@ -14,7 +14,7 @@ commands = python -m pip install --upgrade pip
 # the test environment is called by the Github action that runs the unit tests
 setenv = PYTHONPATH = {toxinidir}/src
 deps =
-    .[tests]
+    .[test]
 commands =
     coverage run -m pytest --basetemp={envtmpdir} {posargs}
     coverage html --omit .tox/*,unittests/*
@@ -23,15 +23,15 @@ commands =
 [testenv:update_snapshots]
 deps =
     -r requirements.txt
-    .[tests]
+    .[test]
     syrupy
 setenv = PYTHONPATH = {toxinidir}/src
 commands = python -m pytest -m snapshot --basetemp={envtmpdir} {posargs} --snapshot-update
 
 [testenv:lint]
 # the lint environment is called by the Github Action that runs the linter
 deps =
-    .[linting]
+    .[lint]
 setenv = PYTHONPATH = {toxinidir}/src
 # add your fixtures like e.g. pytest_datafiles here
 commands =