diff --git a/packages/snjs/mocha/001.test.js b/packages/snjs/mocha/001.test.js
index b3f41fbbf..56a49f0d6 100644
--- a/packages/snjs/mocha/001.test.js
+++ b/packages/snjs/mocha/001.test.js
@@ -82,6 +82,29 @@ describe('001 protocol operations', () => {
     expect(decrypted.content.text).to.equal('Decryptable Sentence')
   })
 
+  it('should decrypt string with case-insensitive uuid check for aad', async () => {
+    /** If the server returns a lowercase uuid for the item, but the encrypted payload uses uppercase uuids, should still decrypt */
+    const uppercaseUuid = '959B042A-3892-461E-8C50-477C10C7C40A'
+    const lowercaseUuid = '959b042a-3892-461e-8c50-477c10c7c40a'
+
+    const payload = new DecryptedPayload({
+      uuid: uppercaseUuid,
+      content_type: ContentType.TYPES.Note,
+      content: FillItemContent({
+        title: 'hello',
+        text: 'world',
+      }),
+    })
+
+    const key = await protocol001.createItemsKey()
+    const params = await protocol001.generateEncryptedParametersAsync(payload, key)
+
+    params.uuid = lowercaseUuid
+
+    const decrypted = await protocol001.generateDecryptedParametersAsync(params, key)
+    expect(decrypted.content).to.eql(payload.content)
+  })
+
   it('properly encrypts and decrypts', async () => {
     const text = 'hello world'
     const key = _key.masterKey
diff --git a/packages/snjs/mocha/002.test.js b/packages/snjs/mocha/002.test.js
index ff47fd240..d167b3e20 100644
--- a/packages/snjs/mocha/002.test.js
+++ b/packages/snjs/mocha/002.test.js
@@ -78,6 +78,29 @@ describe('002 protocol operations', () => {
     expect(decrypted.content.text).to.equal('Decryptable Sentence')
   })
 
+  it('should decrypt string with case-insensitive uuid check for aad', async () => {
+    /** If the server returns a lowercase uuid for the item, but the encrypted payload uses uppercase uuids, should still decrypt */
+    const uppercaseUuid = '959B042A-3892-461E-8C50-477C10C7C40A'
+    const lowercaseUuid = '959b042a-3892-461e-8c50-477c10c7c40a'
+
+    const payload = new DecryptedPayload({
+      uuid: uppercaseUuid,
+      content_type: ContentType.TYPES.Note,
+      content: FillItemContent({
+        title: 'hello',
+        text: 'world',
+      }),
+    })
+
+    const key = await protocol002.createItemsKey()
+    const params = await protocol002.generateEncryptedParametersAsync(payload, key)
+
+    params.uuid = lowercaseUuid
+
+    const decrypted = await protocol002.generateDecryptedParametersAsync(params, key)
+    expect(decrypted.content).to.eql(payload.content)
+  })
+
   it('properly encrypts and decrypts strings', async () => {
     const text = 'hello world'
     const key = _key.masterKey
diff --git a/packages/snjs/mocha/004.test.js b/packages/snjs/mocha/004.test.js
index 503fe953a..949c602ae 100644
--- a/packages/snjs/mocha/004.test.js
+++ b/packages/snjs/mocha/004.test.js
@@ -128,6 +128,29 @@ describe('004 protocol operations', function () {
     expect(decrypted.content).to.eql(payload.content)
   })
 
+  it('should decrypt string with case-insensitive uuid check for aad', async () => {
+    /** If the server returns a lowercase uuid for the item, but the encrypted payload uses uppercase uuids, should still decrypt */
+    const uppercaseUuid = '959B042A-3892-461E-8C50-477C10C7C40A'
+    const lowercaseUuid = '959b042a-3892-461e-8c50-477c10c7c40a'
+
+    const payload = new DecryptedPayload({
+      uuid: uppercaseUuid,
+      content_type: ContentType.TYPES.Note,
+      content: FillItemContent({
+        title: 'hello',
+        text: 'world',
+      }),
+    })
+
+    const key = await protocol004.createItemsKey()
+    const params = await protocol004.generateEncryptedParameters(payload, key)
+
+    params.uuid = lowercaseUuid
+
+    const decrypted = await protocol004.generateDecryptedParameters(params, key)
+    expect(decrypted.content).to.eql(payload.content)
+  })
+
   it('modifying the uuid of the payload should fail to decrypt', async function () {
     const payload = Factory.createNotePayload()
     const key = await protocol004.createItemsKey()