diff --git a/tests/functional/flakes/common.sh b/tests/functional/flakes/common.sh
index 422cab96c..2950b3898 100644
--- a/tests/functional/flakes/common.sh
+++ b/tests/functional/flakes/common.sh
@@ -94,6 +94,8 @@ writeIfdFlake() {
 {
   outputs = { self }: {
     packages.$system.default = import ./ifd.nix;
+    checks.$system = import ./ifd.nix;
+    formatter = import ./ifd.nix;
   };
 }
 EOF
diff --git a/tests/functional/flakes/show.sh b/tests/functional/flakes/show.sh
index 7fcc6aca9..5407e0086 100755
--- a/tests/functional/flakes/show.sh
+++ b/tests/functional/flakes/show.sh
@@ -100,5 +100,7 @@ nix eval --impure --expr '
 let show_output = builtins.fromJSON (builtins.readFile ./show-output.json);
 in
 assert show_output.packages.${builtins.currentSystem}.default == { };
+assert show_output.checks.${builtins.currentSystem} == { };
+assert show_output.formatter == { };
 true
 '