diff --git a/Makefile b/Makefile
index 891b710732..806b8b228f 100644
--- a/Makefile
+++ b/Makefile
@@ -18,7 +18,7 @@ dist: FORCE
 	$(PYTHON) -m build --sdist
 
 test: .PHONY
-	tox -e py39
+	tox -e py310
 	cargo test
 
 doc: .PHONY
diff --git a/doc/developer.md b/doc/developer.md
index ab879609a2..3b6d9ff811 100644
--- a/doc/developer.md
+++ b/doc/developer.md
@@ -71,7 +71,7 @@ to start an environment ready for [running tests and checks](#running-tests-and-
 :::{tab-item} General instructions
 
 As long as you have `tox` and a Rust compiler available,
-you can skip `pixi` or `Nix`.
+you can skip `conda`, `pixi`, or `nix`.
 
 For Rust, we suggest using `rustup` to install the Rust environment:
 ```