diff --git a/utils/ECC/crypto.spec.js b/utils/ECC/crypto.spec.js
new file mode 100644
index 00000000..5e18abf7
--- /dev/null
+++ b/utils/ECC/crypto.spec.js
@@ -0,0 +1,17 @@
+/**
+ * @format
+ */
+// @ts-check
+const expect = require('expect')
+
+const { generateRandomString } = require('./crypto')
+
+describe('generateRandomString()', () => {
+  it('creates a random string of the specified length', async () => {
+    expect.hasAssertions()
+    const len = Math.ceil(Math.random() * 100)
+    const result = await generateRandomString(len)
+
+    expect(result.length).toEqual(len)
+  })
+})