diff --git a/nixos/tests/all-tests.nix b/nixos/tests/all-tests.nix
index 83765d4e48d2..2602ab644c59 100644
--- a/nixos/tests/all-tests.nix
+++ b/nixos/tests/all-tests.nix
@@ -8,7 +8,7 @@
 
 }:
 # The return value of this function will be an attrset with arbitrary depth and
-# the `anything` returned by callTest at its test leafs.
+# the `anything` returned by callTest at its test leaves.
 # The tests not supported by `system` will be replaced with `{}`, so that
 # `passthru.tests` can contain links to those without breaking on architectures
 # where said tests are unsupported.