diff --git a/src/theme/mod.rs b/src/theme/mod.rs
index ef29cc48..de70b98b 100644
--- a/src/theme/mod.rs
+++ b/src/theme/mod.rs
@@ -227,6 +227,8 @@ mod tests {
             "highlight.css",
             "ayu-highlight.css",
             "clipboard.min.js",
+            "iframe.html",
+            "wasm-entry.mjs",
         ];
 
         let temp = TempFileBuilder::new().prefix("mdbook-").tempdir().unwrap();
diff --git a/tests/init.rs b/tests/init.rs
index 4deb8401..72fce0ee 100644
--- a/tests/init.rs
+++ b/tests/init.rs
@@ -123,7 +123,9 @@ fn copy_theme() {
         "favicon.svg",
         "highlight.css",
         "highlight.js",
+        "iframe.html",
         "index.hbs",
+        "wasm-entry.mjs",
     ];
     let theme_dir = temp.path().join("theme");
     let mut actual: Vec<_> = walkdir::WalkDir::new(&theme_dir)