diff --git a/env.ps1 b/env.ps1
index 1e4b87b..9ab32e9 100644
--- a/env.ps1
+++ b/env.ps1
@@ -34,7 +34,7 @@
 Function Global:dolint { flake8 src tests build.py }
 Function Global:dotest { pytest -q -n auto -x -l --sw --hypothesis-profile=dev $args }
 Function Global:dotest_ci { pytest -q -n auto --hypothesis-profile=ci }
-Function Global:dotest_long { pytest -q -n 4 --hypothesis-profile=long }
+Function Global:dotest_long { pytest -q -n auto --hypothesis-profile=long }
 Function Global:docheck { dotidy && dolint && dotest }
 Function Global:_envps1_domut { mutmut run --paths-to-mutate "src/token.py src/tokenize.py src/parse.py" $args }
 Function Global:domut { _envps1_domut }
diff --git a/env.sh b/env.sh
index 63bbd6f..362db1a 100644
--- a/env.sh
+++ b/env.sh
@@ -30,7 +30,7 @@
 dolint() { flake8 src tests build.py; }
 dotest() { pytest -q -n auto -x -l --sw --hypothesis-profile=dev $@; }
 dotest_ci() { pytest -q -n auto --hypothesis-profile=ci; }
-dotest_long() { pytest -q -n 4 --hypothesis-profile=long; }
+dotest_long() { pytest -q -n auto --hypothesis-profile=long; }
 docheck() { dotidy && dolint && dotest; }
 _envsh_domut() { mutmut run --paths-to-mutate "src/token.py src/tokenize.py src/parse.py" $@; }
 domut() { _envsh_domut; }