diff --git a/editors/vscode/test/completion-scope.test.js b/editors/vscode/test/completion-scope.test.js
index db143c19..bc453928 100644
--- a/editors/vscode/test/completion-scope.test.js
+++ b/editors/vscode/test/completion-scope.test.js
@@ -74,7 +74,7 @@ test("provideCompletionItems returns empty array when inside view block", () =>
     getText() {
       return PAGE;
     },
-    offsetAt(position) {
+    offsetAt() {
       return PAGE.indexOf("<div");
     },
     lineAt() {
@@ -94,7 +94,7 @@ test("provideCompletionItems returns non-empty array when inside functions block
     getText() {
       return PAGE;
     },
-    offsetAt(position) {
+    offsetAt() {
       return PAGE.indexOf("function go");
     },
     lineAt() {
diff --git a/editors/vscode/test/validate.mjs b/editors/vscode/test/validate.mjs
index aadc813e..119cfb92 100644
--- a/editors/vscode/test/validate.mjs
+++ b/editors/vscode/test/validate.mjs
@@ -113,6 +113,21 @@ try {
     readFileSync(join(root, rel), "utf8");
     ok(`Marketplace document exists: ${rel}`);
   }
+
+  const emmetLanguages = manifest.contributes?.configurationDefaults?.["emmet.includeLanguages"];
+  emmetLanguages?.wrn === "html"
+    ? ok("Emmet is mapped for wrn documents")
+    : bad("Emmet is mapped for wrn documents", `got ${JSON.stringify(emmetLanguages)}`);
+
+  const autoClose =
+    manifest.contributes?.configuration?.properties?.["wrnexus.html.autoClosingTags"];
+  autoClose?.type === "boolean" && autoClose?.default === true
+    ? ok("auto-closing tags setting is contributed")
+    : bad("auto-closing tags setting is contributed", `got ${JSON.stringify(autoClose)}`);
+
+  manifest.dependencies?.["vscode-html-languageservice"]
+    ? ok("HTML language service ships as a runtime dependency")
+    : bad("HTML language service ships as a runtime dependency");
 } catch (e) {
   bad("Marketplace metadata", e.message);
 }