Pass color variables into tox runs

.github/workflows/ci.yml

@@ -10,7 +10,6 @@ on:
 
 env:
   FORCE_COLOR: "1" # Make tools pretty.
-  TOX_TESTENV_PASSENV: FORCE_COLOR
   SETUPTOOLS_SCM_PRETEND_VERSION: "1.0" # avoid warnings about shallow checkout
   PIP_DISABLE_PIP_VERSION_CHECK: 1
   PIP_NO_PYTHON_VERSION_WARNING: 1

tox.ini

@@ -16,6 +16,9 @@ description = Run tests and do NOT measure coverage.
 package = wheel
 wheel_build_env = .pkg
 extras = tests
+pass_env =
+    FORCE_COLOR
+    NO_COLOR
 commands =
     pytest {posargs}
     python -Im argon2 -n 1 -t 1 -m 8 -p 1
@@ -45,19 +48,14 @@ commands =
 description = Run tests against bindings that use a system installation of Argon2.
 set_env = ARGON2_CFFI_USE_SYSTEM=1
 install_command = pip install {opts} --no-binary=argon2-cffi-bindings {packages}
-commands =
-    pytest {posargs}
-    python -Im argon2 -n 1 -t 1 -m 8 -p 1
 
 
 [testenv:py311-bindings-main]
 description = Run tests against the current main branch of argon2-cffi-bindings
-install_command = pip install {opts} --no-deps {packages}
 extras =
-commands =
-    pip install -I hypothesis pytest git+https://github.com/hynek/argon2-cffi-bindings
-    pytest {posargs}
-    python -Im argon2 -n 1 -t 1 -m 8 -p 1
+deps =
+install_command = pip install {opts} --no-deps {packages}
+commands_pre = pip install -I hypothesis pytest git+https://github.com/hynek/argon2-cffi-bindings
 
 
 [testenv:docs]