diff --git a/html/semantics/scripting-1/the-script-element/module/dynamic-import/microtasks.html b/html/semantics/scripting-1/the-script-element/module/dynamic-import/microtasks/basic.html
similarity index 66%
rename from html/semantics/scripting-1/the-script-element/module/dynamic-import/microtasks.html
rename to html/semantics/scripting-1/the-script-element/module/dynamic-import/microtasks/basic.html
index ee1241f14cdbb63..f36bb693da64289 100644
--- a/html/semantics/scripting-1/the-script-element/module/dynamic-import/microtasks.html
+++ b/html/semantics/scripting-1/the-script-element/module/dynamic-import/microtasks/basic.html
@@ -3,20 +3,7 @@
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script type="module">
-
-function ticker(max) {
-  let i = 0;
-  let stop = false;
-  Promise.resolve().then(function loop() {
-    if (stop || i >= max) return;
-    i++;
-    Promise.resolve().then(loop);
-  });
-  return () => {
-    stop = true;
-    return i;
-  };
-}
+import { ticker } from "./ticker.js";
 
 promise_test(async t => {
   const getCount = ticker(1000);
@@ -30,16 +17,16 @@
 }, "import() should not drain the microtask queue if it fails during specifier resolution");
 
 promise_test(async t => {
-  await import("./../imports-a.js");
+  await import("./../../imports-a.js");
 
   const getCount = ticker(1000);
-  await import("./../imports-a.js");
+  await import("./../../imports-a.js");
   assert_less_than(getCount(), 1000);
 }, "import() should not drain the microtask queue when loading an already loaded module");
 
 promise_test(async t => {
   const getCount = ticker(1e7);
-  await import("./../imports-a.js?" + Date.now()); // Use Date.now() to ensure that the module is not in the module map
+  await import("./../../imports-a.js?" + Date.now()); // Use Date.now() to ensure that the module is not in the module map
   assert_equals(getCount(), 1e7);
 }, "import() should drain the microtask queue when fetching a new module");
 </script>
diff --git a/html/semantics/scripting-1/the-script-element/module/dynamic-import/microtasks/ticker.js b/html/semantics/scripting-1/the-script-element/module/dynamic-import/microtasks/ticker.js
new file mode 100644
index 000000000000000..2d655b4dafd5487
--- /dev/null
+++ b/html/semantics/scripting-1/the-script-element/module/dynamic-import/microtasks/ticker.js
@@ -0,0 +1,13 @@
+export function ticker(max) {
+  let i = 0;
+  let stop = false;
+  Promise.resolve().then(function loop() {
+    if (stop || i >= max) return;
+    i++;
+    Promise.resolve().then(loop);
+  });
+  return () => {
+    stop = true;
+    return i;
+  };
+};
diff --git a/html/semantics/scripting-1/the-script-element/module/dynamic-import/microtasks/with-import-assertions.html b/html/semantics/scripting-1/the-script-element/module/dynamic-import/microtasks/with-import-assertions.html
new file mode 100644
index 000000000000000..2d63ca7fb9a923d
--- /dev/null
+++ b/html/semantics/scripting-1/the-script-element/module/dynamic-import/microtasks/with-import-assertions.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<title>Dynamic import interaction with microtask queue</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script type="module">
+import { ticker } from "./ticker.js";
+
+promise_test(async t => {
+  const getCount = ticker(1000);
+
+  try {
+    await import("./../../imports-a.js", { type: "<invalid>" });
+    assert_unreached('import() should reject');
+  } catch (_) {}
+
+  assert_less_than(getCount(), 1000);
+}, "import() should not drain the microtask queue if it fails while validating the 'type' assertion");
+</script>
