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diff --git a/testing/web-platform/tests/html/semantics/scripting-1/the-script-element/nomodule-set-on-synchronously-loaded-classic-scripts.html b/testing/web-platform/tests/html/semantics/scripting-1/the-script-element/nomodule-set-on-synchronously-loaded-classic-scripts.html
new file mode 100644
index 0000000000..9f6207c9a5
--- /dev/null
+++ b/testing/web-platform/tests/html/semantics/scripting-1/the-script-element/nomodule-set-on-synchronously-loaded-classic-scripts.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<html>
+<head>
+<title>External classic scripts with nomodule content attribute must not run</title>
+<link rel="author" title="Yusuke Suzuki" href="mailto:utatane.tea@gmail.com">
+<link rel="author" title="Ryosuke Niwa" href="mailto:rniwa@webkit.org">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+</head>
+<body>
+<script>
+
+window.executed = false;
+window.loaded = false;
+window.errored = false;
+</script>
+<script src="./resources/set-script-executed.js" onload="loaded = true" onerror="errored = false"></script>
+<script>
+
+test(() => {
+    assert_true(executed);
+    assert_true(loaded);
+    assert_false(errored);
+}, 'A synchronously loaded external classic script without nomodule content attribute must run');
+
+window.executed = false;
+window.loaded = false;
+window.errored = false;
+</script>
+<script nomodule src="./resources/set-script-executed.js" onload="loaded = true" onerror="errored = false"></script>
+<script>
+
+test(() => {
+    assert_false(executed);
+    assert_false(loaded);
+    assert_false(errored);
+}, 'A synchronously loaded external classic script with nomodule content attribute must not run');
+
+</script>
+</body>
+</html>