diff --git a/test/private-box.test.ts b/test/private-box.test.ts
index 7244432..77bde6c 100644
--- a/test/private-box.test.ts
+++ b/test/private-box.test.ts
@@ -36,6 +36,22 @@ test('Key generation', async () => {
   expect(k2.publicKey.extractable).toBeTrue()
 })
 
+test('Encrypt with context', async () => {
+  const context = 'Super context !'
+  const box = await PrivateBox.encrypt(message, k1.publicKey, context)
+  expect(box).not.toBeNull()
+  const unboxed = await box!.decrypt(k1.privateKey, context)
+  expect(unboxed).toEqual(message)
+})
+test('Encrypt with different context', async () => {
+  const context1 = 'Super context !'
+  const context2 = 'Awesome context !'
+  const box = await PrivateBox.encrypt(message, k1.publicKey, context1)
+  expect(box).not.toBeNull()
+  const unboxed = await box!.decrypt(k1.privateKey, context2)
+  expect(unboxed).toBeNull()
+})
+
 test('serialization', async () => {
   const box = await PrivateBox.encrypt(message, k1.publicKey)
   expect(box).not.toBeNull()
diff --git a/test/private-wrap.test.ts b/test/private-wrap.test.ts
index 8c9a47c..df16783 100644
--- a/test/private-wrap.test.ts
+++ b/test/private-wrap.test.ts
@@ -36,6 +36,22 @@ test('Key generation', async () => {
   expect(k2.publicKey.extractable).toBeTrue()
 })
 
+test("Encryption works with context", async () => {
+  const context = 'Super context !'
+  const box = await PrivateWrap.wrap(message, k1.publicKey, context)
+  expect(box).not.toBeNull()
+  const unboxed = await box!.unwrap(k1.privateKey, context)
+  expect(unboxed).not.toBeNull()
+})
+test("Encryption doesn't work with different context", async () => {
+  const context1 = 'Super context !'
+  const context2 = 'Awesome context !'
+  const box = await PrivateWrap.wrap(message, k1.publicKey, context1)
+  expect(box).not.toBeNull()
+  const unboxed = await box!.unwrap(k1.privateKey, context2)
+  expect(unboxed).toBeNull()
+})
+
 test('serialization', async () => {
   const box = await PrivateWrap.wrap(message, k1.publicKey)
   expect(box).not.toBeNull()
diff --git a/test/pwd-box.test.ts b/test/pwd-box.test.ts
index f7330df..e641f4f 100644
--- a/test/pwd-box.test.ts
+++ b/test/pwd-box.test.ts
@@ -23,6 +23,21 @@ test("Different key can't decrypt", async () => {
   const unboxed = await box!.decrypt(k2)
   expect(unboxed).toBeNull()
 })
+test("Encryption works with context", async () => {
+  const c1 = 'context1'
+  const box = await PwdBox.encrypt(message, k1, c1)
+  expect(box).not.toBeNull()
+  const unboxed = await box!.decrypt(k1, c1)
+  expect(unboxed).not.toBeNull()
+})
+test("Encryption doesn't work with different context", async () => {
+  const c1 = 'context1'
+  const c2 = 'context2'
+  const box = await PwdBox.encrypt(message, k1, c1)
+  expect(box).not.toBeNull()
+  const unboxed = await box!.decrypt(k1, c2)
+  expect(unboxed).toBeNull()
+})
 
 test('serialization', async () => {
   const box = await PwdBox.encrypt(message, k1)
diff --git a/test/pwd-wrap.test.ts b/test/pwd-wrap.test.ts
index d569696..bcf840d 100644
--- a/test/pwd-wrap.test.ts
+++ b/test/pwd-wrap.test.ts
@@ -24,6 +24,23 @@ test("Different key can't decrypt", async () => {
   expect(unboxed).toBeNull()
 })
 
+test('Encryption works with context', async () => {
+  const context = 'awesome context !'
+  const box = await PwdWrap.wrap(message, k1, context)
+  expect(box).not.toBeNull()
+  const unboxed = await box!.unwrap(k1, context)
+  expect(unboxed).toEqual(message)
+})
+test("Encryption doesn't work with different context", async () => {
+  const c1 = 'super context !'
+  const c2 = 'awesome context !'
+  const box = await PwdWrap.wrap(message, k1, c1)
+  expect(box).not.toBeNull()
+  const unboxed = await box!.unwrap(k1,c2)
+  expect(unboxed).toBeNull()
+  expect(unboxed).not.toEqual(message)
+})
+
 test('serialization', async () => {
   const box = await PwdWrap.wrap(message, k1)
   expect(box).not.toBeNull()
diff --git a/test/secret-box.test.ts b/test/secret-box.test.ts
index 9789301..5ec111a 100644
--- a/test/secret-box.test.ts
+++ b/test/secret-box.test.ts
@@ -29,7 +29,7 @@ test('Key generation', async () => {
   expect(k2.extractable).toBeTrue()
 })
 
-test('serialization', async () => {
+test('String serialization', async () => {
   const box = await SecretBox.encrypt(message, k1)
   expect(box).not.toBeNull()
 
@@ -43,3 +43,18 @@ test('serialization', async () => {
   expect(unboxed).not.toBeNull()
   expect(unboxed).toEqual(message)
 })
+
+test('Byte serialization', async () => {
+  const box = await SecretBox.encrypt(message, k1)
+  expect(box).not.toBeNull()
+
+  const ser = box!.toBytes()
+  const de = SecretBox.fromBytes(ser)
+
+  expect(de).not.toBeNull()
+  expect(de).toEqual(box)
+
+  const unboxed = await de!.decrypt(k1)
+  expect(unboxed).not.toBeNull()
+  expect(unboxed).toEqual(message)
+})