diff --git a/checks/fixtures/valid/delta/SKILL.md b/checks/fixtures/valid/delta/SKILL.md
deleted file mode 100644
index 0d97d6b..0000000
--- a/checks/fixtures/valid/delta/SKILL.md
+++ /dev/null
@@ -1 +0,0 @@
-# delta — another top-level skill
diff --git a/checks/skill-build.nix b/checks/skill-build.nix
index d06ed9d..4d5dad5 100644
--- a/checks/skill-build.nix
+++ b/checks/skill-build.nix
@@ -34,8 +34,8 @@ pkgs.runCommandLocal "skill-build-check"
 
     echo "content tier: discovery finds every skill regardless of nesting depth,"
     echo "              and stops at a skill rather than descending into its assets"
-    [ "$expectedNames" = "alpha beta delta gamma" ] \
-      || fail "discovered names were [$expectedNames], expected [alpha beta delta gamma]"
+    [ "$expectedNames" = "alpha beta gamma" ] \
+      || fail "discovered names were [$expectedNames], expected [alpha beta gamma]"
 
     echo "content tier: each built skill has SKILL.md at its \$out root"
     beta_path=