diff --git a/scripts/markdown-refs.test.mjs b/scripts/markdown-refs.test.mjs
index 7ae5b2c12d..3d850a5f01 100644
--- a/scripts/markdown-refs.test.mjs
+++ b/scripts/markdown-refs.test.mjs
@@ -58,7 +58,7 @@ test("HTML comments hide references on one line or across several", () => {
 
 test("annotating leaves every other byte in place", async () => {
   const dir = new URL("../release-notes/studio/", import.meta.url);
-  for (const name of await readdir(dir)) {
+  for (const name of (await readdir(dir, { recursive: true })).filter((entry) => entry.endsWith(".md"))) {
     const source = await readFile(new URL(name, dir), "utf8");
     assert.equal(annotateMarkdown(source, () => ""), source, name);
     assert.equal(annotateMarkdown(source, tag).replace(/<\d+>/g, ""), source, name);
diff --git a/scripts/studio-release-notes.test.mjs b/scripts/studio-release-notes.test.mjs
index e521bbec7b..6eabf95e87 100644
--- a/scripts/studio-release-notes.test.mjs
+++ b/scripts/studio-release-notes.test.mjs
@@ -62,7 +62,7 @@ test("an unresolved ref stays plain and is reported by code", async () => {
 
 test("committed notes render unchanged when nothing is credited", async () => {
   const dir = new URL("../release-notes/studio/", import.meta.url);
-  for (const name of await readdir(dir)) {
+  for (const name of (await readdir(dir, { recursive: true })).filter((entry) => entry.endsWith(".md"))) {
     const source = await readFile(new URL(name, dir), "utf8");
     assert.equal(renderStudioNotes(source, new Map()), `${source.trimEnd()}\n`, name);
   }