diff --git a/test/markdownlint-test-repos.js b/test/markdownlint-test-repos.js
index 20a73b38..2ac92370 100644
--- a/test/markdownlint-test-repos.js
+++ b/test/markdownlint-test-repos.js
@@ -38,7 +38,16 @@ async function lintTestRepo(t, globPatterns, configPath) {
     const config = Object.fromEntries(
       // @ts-ignore
       Object.entries(rawConfig).
-        map(([ k, v ]) => [ k.replace(/header/, "heading"), v ])
+        map(([ k, v ]) => [
+          k.replace(/header/, "heading"),
+          typeof v === "object" ?
+            Object.fromEntries(
+              // @ts-ignore
+              Object.entries(v).
+                map(([ kk, vv ]) => [ kk.replace(/^allow_different_nesting$/, "siblings_only"), vv ])
+              ) :
+            v
+        ])
     );
     return markdownlintPromise({
       files,
diff --git a/test/snapshots/markdownlint-test-repos.js.snap b/test/snapshots/markdownlint-test-repos.js.snap
index 1b1a6d15..d1c786de 100644
Binary files a/test/snapshots/markdownlint-test-repos.js.snap and b/test/snapshots/markdownlint-test-repos.js.snap differ