diff --git a/lib/tests/modules/define-option-dependently.nix b/lib/tests/modules/define-option-dependently.nix
index 6abce29366a..ad85f99a919 100644
--- a/lib/tests/modules/define-option-dependently.nix
+++ b/lib/tests/modules/define-option-dependently.nix
@@ -7,7 +7,7 @@
   # Always defined, but the value depends on the presence of an option.
   config = {
     value = if options ? enable then 360 else 7;
-  } 
+  }
   # Only define if possible.
   // lib.optionalAttrs (options ? enable) {
     enable = true;