diff --git a/test/cache/cache.js b/test/cache/cache.js
new file mode 100644
index 00000000000..4a6b1ba960f
--- /dev/null
+++ b/test/cache/cache.js
@@ -0,0 +1,12 @@
+'use strict'
+
+const { throws } = require('node:assert')
+const { test } = require('node:test')
+const { Cache } = require('../../lib/web/cache/cache')
+
+test('constructor', () => {
+  throws(() => new Cache(null), {
+    name: 'TypeError',
+    message: 'TypeError: Illegal constructor'
+  })
+})
diff --git a/test/cache/cachestorage.js b/test/cache/cachestorage.js
new file mode 100644
index 00000000000..ba648f1197f
--- /dev/null
+++ b/test/cache/cachestorage.js
@@ -0,0 +1,12 @@
+'use strict'
+
+const { throws } = require('node:assert')
+const { test } = require('node:test')
+const { CacheStorage } = require('../../lib/web/cache/cachestorage')
+
+test('constructor', () => {
+  throws(() => new CacheStorage(null), {
+    name: 'TypeError',
+    message: 'TypeError: Illegal constructor'
+  })
+})