diff --git a/tox.ini b/tox.ini
index 575839b27..87fadab7e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -36,9 +36,9 @@ commands =
 [testenv:docs]
 description = Build the documentation with makefile under {basepython}
 setenv =
+    !notebooks: SKIP_NOTEBOOKS = 1
     PYTHONPATH = {toxinidir}
     READTHEDOCS = 1
-    !notebooks: SKIP_NOTEBOOKS = 1
 commands =
     make docs
 allowlist_externals =
@@ -88,7 +88,10 @@ setenv =
     COV_CORE_SOURCE =
     PYTEST_ADDOPTS = "--color=yes"
     PYTHONPATH = {toxinidir}
-passenv = CI GITHUB_* LD_LIBRARY_PATH
+passenv =
+    CI
+    GITHUB_*
+    LD_LIBRARY_PATH
 extras = dev
 deps =
     coverage: coveralls