diff --git a/html/semantics/scripting-1/the-script-element/json-module/content-type.html b/html/semantics/scripting-1/the-script-element/json-module/content-type.html
new file mode 100644
index 00000000000000..78e8b1d23fed22
--- /dev/null
+++ b/html/semantics/scripting-1/the-script-element/json-module/content-type.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>JSON modules: Content-Type</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id=log></div>
+<script>
+function check(t, v) {
+  t.step(() => {
+    assert_equals(typeof v, "object");
+    assert_array_equals(Object.keys(v), ["test"]);
+    assert_equals(v.test, true);
+    t.done();
+  });
+}
+const t1 = async_test("text/json");
+const t2 = async_test("application/json");
+const t3 = async_test("text/html+json");
+const t4 = async_test("image/svg+json");
+</script>
+<script type="module" onerror="t1.step(() => assert_unreached(event))">
+import v from "../serve-with-content-type.py?fn=json-module/module.json&ct=text/json";
+check(t1, v);
+</script>
+<script type="module" onerror="t2.step(() => assert_unreached(event))">
+import v from "../serve-with-content-type.py?fn=json-module/module.json&ct=application/json";
+check(t2, v);
+</script>
+<script type="module" onerror="t3.step(() => assert_unreached(event))">
+import v from "../serve-with-content-type.py?fn=json-module/module.json&ct=text/html+json";
+check(t3, v);
+</script>
+<script type="module" onerror="t4.step(() => assert_unreached(event))">
+import v from "../serve-with-content-type.py?fn=json-module/module.json&ct=image/svg+json";
+check(t4, v);
+</script>
diff --git a/html/semantics/scripting-1/the-script-element/json-module/module.html b/html/semantics/scripting-1/the-script-element/json-module/module.html
new file mode 100644
index 00000000000000..93243853226806
--- /dev/null
+++ b/html/semantics/scripting-1/the-script-element/json-module/module.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>JSON modules</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id=log></div>
+<script>
+const t = async_test();
+</script>
+<script type="module" onerror="t.step(() => assert_unreached(event))">
+import v from "./module.json";
+t.step(() => {
+  assert_equals(typeof v, "object");
+  assert_array_equals(Object.keys(v), ["test"]);
+  assert_equals(v.test, true);
+  t.done();
+});
+</script>
diff --git a/html/semantics/scripting-1/the-script-element/json-module/module.json b/html/semantics/scripting-1/the-script-element/json-module/module.json
new file mode 100644
index 00000000000000..f834b2a4e8fab0
--- /dev/null
+++ b/html/semantics/scripting-1/the-script-element/json-module/module.json
@@ -0,0 +1,3 @@
+{
+  "test": true
+}
diff --git a/html/semantics/scripting-1/the-script-element/json-module/parse-error.html b/html/semantics/scripting-1/the-script-element/json-module/parse-error.html
new file mode 100644
index 00000000000000..8b3cce0d390070
--- /dev/null
+++ b/html/semantics/scripting-1/the-script-element/json-module/parse-error.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>JSON modules: Content-Type</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id=log></div>
+<script>
+setup({
+  allow_uncaught_exception: true,
+});
+async_test(t => {
+  window.addEventListener("error", t.step_func_done(e => {
+    assert_true(e instanceof ErrorEvent, "ErrorEvent");
+    assert_equals(e.filename, new URL("parse-error.json", location).href);
+    assert_true(e.error instanceof SyntaxError, "SyntaxError");
+  }));
+});
+</script>
+<script type="module">
+import v from "./parse-error.json";
+</script>
diff --git a/html/semantics/scripting-1/the-script-element/json-module/parse-error.json b/html/semantics/scripting-1/the-script-element/json-module/parse-error.json
new file mode 100644
index 00000000000000..98232c64fce936
--- /dev/null
+++ b/html/semantics/scripting-1/the-script-element/json-module/parse-error.json
@@ -0,0 +1 @@
+{
diff --git a/html/semantics/scripting-1/the-script-element/json-module/utf8.html b/html/semantics/scripting-1/the-script-element/json-module/utf8.html
new file mode 100644
index 00000000000000..1c0360b17e3f9e
--- /dev/null
+++ b/html/semantics/scripting-1/the-script-element/json-module/utf8.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>JSON modules: UTF-8 decoding</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id=log></div>
+<script>
+function check(t, v) {
+  t.step(() => {
+    assert_equals(typeof v, "object");
+    assert_array_equals(Object.keys(v), ["test"]);
+    assert_equals(v.test, "\u2026");
+    t.done();
+  });
+}
+const t1 = async_test("utf-8");
+const t2 = async_test("shift-jis");
+const t3 = async_test("windows-1252");
+const t4 = async_test("utf-7");
+</script>
+<script type="module" onerror="t1.step(() => assert_unreached(event))">
+import v from "../serve-with-content-type.py?fn=json-module/utf8.json&ct=text/json%3Bcharset=utf-8";
+check(t1, v);
+</script>
+<script type="module" onerror="t2.step(() => assert_unreached(event))">
+import v from "../serve-with-content-type.py?fn=json-module/utf8.json&ct=text/json%3Bcharset=shift-jis";
+check(t2, v);
+</script>
+<script type="module" onerror="t3.step(() => assert_unreached(event))">
+import v from "../serve-with-content-type.py?fn=json-module/utf8.json&ct=text/json%3Bcharset=windows-1252";
+check(t3, v);
+</script>
+<script type="module" onerror="t4.step(() => assert_unreached(event))">
+import v from "../serve-with-content-type.py?fn=json-module/utf8.json&ct=text/json%3Bcharset=utf-7";
+check(t4, v);
+</script>
diff --git a/html/semantics/scripting-1/the-script-element/json-module/utf8.json b/html/semantics/scripting-1/the-script-element/json-module/utf8.json
new file mode 100644
index 00000000000000..7bb9edd2f79e82
--- /dev/null
+++ b/html/semantics/scripting-1/the-script-element/json-module/utf8.json
@@ -0,0 +1,3 @@
+{
+  "test": "…"
+}
