diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 0000000..660f37b
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,26 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "Launch Program",
+            "skipFiles": [
+                "<node_internals>/**"
+            ],
+            "program": "${workspaceFolder}/index.js"
+        },
+        {
+            "type": "node",
+            "request": "launch",
+            "skipFiles": [
+                "<node_internals>/**"
+            ],
+            "name": "Run tests",
+            "program": "${workspaceFolder}/node_modules/mocha/bin/mocha.js"
+        }
+    ]
+}
\ No newline at end of file
diff --git a/test/scrypt.test.js b/test/scrypt.test.js
index c34848c..5951c93 100644
--- a/test/scrypt.test.js
+++ b/test/scrypt.test.js
@@ -13,7 +13,7 @@ describe('hashing and verification', function () {
     salt.length.should.eq(32)
     key.length.should.eq(86)
     Buffer.from(key, 'base64url').length.should.eq(64)
-    scrypt.verify(derived, pass).should.eventually.be.true
+    await scrypt.verify(derived, pass).should.eventually.be.true
   })
 })
 describe('hashSync() and sync verification', function () {
@@ -31,35 +31,37 @@ describe('hashSync() and sync verification', function () {
 
 describe('hash() error cases', function () {
   it('throws an error when it receives an invalid cost value', async function () {
-    scrypt
+    await scrypt
       .hash('bad password', { cost: 2.3 })
       .should.be.rejectedWith(scrypt.InvalidOptions)
-    scrypt
+    await scrypt
       .hash('bad password', { cost: 2 /* too small */ })
       .should.be.rejectedWith(scrypt.InvalidOptions)
   })
   it('throws an error when it receives an invalid keyLength value', async function () {
-    scrypt
+    await scrypt
       .hash('bad password', { keyLength: 2.3 })
       .should.be.rejectedWith(scrypt.InvalidOptions)
   })
   it('throws an error when it receives an invalid saltLength value', async function () {
-    scrypt
+    await scrypt
       .hash('bad password', { saltLength: 2.3 })
       .should.be.rejectedWith(scrypt.InvalidOptions)
-    scrypt
+    await scrypt
       .hash('bad password', { saltLength: 15 /* too small */ })
       .should.be.rejectedWith(scrypt.InvalidOptions)
   })
-  it('throws an error when the password is not the right thing', function () {
-    scrypt.hash(undefined).should.be.rejected
-    scrypt.hash(null).should.be.rejected
-    scrypt.hash(123.4).should.be.rejected
-    scrypt.hash(NaN).should.be.rejected
-    scrypt.hash(['some', 'arbitrary', 'values']).should.be.rejected
-    scrypt.hash({ some: 'arbitrary values' }).should.be.rejected
-    scrypt.hash(Symbol('something else')).should.be.rejected
-    scrypt.hash(() => "no, you can't do this either").should.be.rejected
+  it('throws an error when the password is not the right thing', async function () {
+    await Promise.all([
+      scrypt.hash(undefined).should.be.rejected,
+      scrypt.hash(null).should.be.rejected,
+      scrypt.hash(123.4).should.be.rejected,
+      scrypt.hash(NaN).should.be.rejected,
+      scrypt.hash(['some', 'arbitrary', 'values']).should.be.rejected,
+      scrypt.hash({ some: 'arbitrary values' }).should.be.rejected,
+      scrypt.hash(Symbol('something else')).should.be.rejected,
+      scrypt.hash(() => "no, you can't do this either").should.be.rejected,
+    ])
   })
 })
 
@@ -102,20 +104,22 @@ describe('hashSync() error cases', function () {
 })
 
 describe('verify() error cases', function () {
-  it('throws an error when the password is not the right thing', function () {
+  it('throws an error when the password is not the right thing', async function () {
     const validHash =
       'e.WCu8zB9FHLhXaAf5Svn7NE4ySqB5X45X.ZLpxVwLz1816kmshqXHn12X_4_lZD_0Yl-27KSLLzdhXJ0Fr2huSD7BvoMlBMOMUQBKyKXPzhKI01_Ot-C_w8g'
-    scrypt.verify(validHash, undefined).should.be.rejected
-    scrypt.verify(validHash, null).should.be.rejected
-    scrypt.verify(validHash, 123.4).should.be.rejected
-    scrypt.verify(validHash, NaN).should.be.rejected
-    scrypt.verify(validHash, ['some', 'arbitrary', 'values']).should.be.rejected
-    scrypt.verify(validHash, { some: 'arbitrary values' }).should.be.rejected
-    scrypt.verify(validHash, Symbol('something else')).should.be.rejected
-    scrypt.verify(validHash, () => "no, you can't do this either").should.be
-      .rejected
-    scrypt.verify(validHash, Promise.resolve("no, you can't do this either"))
-      .should.be.rejected
+    await Promise.all([
+      scrypt.verify(validHash, undefined).should.be.rejected,
+      scrypt.verify(validHash, null).should.be.rejected,
+      scrypt.verify(validHash, 123.4).should.be.rejected,
+      scrypt.verify(validHash, NaN).should.be.rejected,
+      scrypt.verify(validHash, ['some', 'arbitrary', 'values']).should.be.rejected,
+      scrypt.verify(validHash, { some: 'arbitrary values' }).should.be.rejected,
+      scrypt.verify(validHash, Symbol('something else')).should.be.rejected,
+      scrypt.verify(validHash, () => "no, you can't do this either").should.be
+        .rejected,
+      scrypt.verify(validHash, Promise.resolve("no, you can't do this either"))
+        .should.be.rejected,
+    ])
   })
   it('throws an error when the hash is not the expected format', async function () {
     const validHash =
@@ -139,7 +143,7 @@ describe('verify() error cases', function () {
     await checkThrows(1234, TypeError)
     await checkThrows(null, TypeError)
     await checkThrows([1, 2, 3], TypeError)
-    scrypt.verify(
+    await scrypt.verify(
       {
         // This is technically valid, why try to prevent it? 🤷
         split: () => hashParts,
@@ -226,3 +230,28 @@ describe('verifySync() error cases', function () {
     checkThrows('')
   })
 })
+
+describe('normalization of unicode characters', function () {
+  it('works, async', async () => {
+    const angstromChar = '\xC5ngstrom'
+    const composed = 'A\u030Angstrom'
+    const withRingAbove = '\u212Bngstrom'
+    let hash = await scrypt.hash(angstromChar)
+    const tests = []
+    tests.push(scrypt.verify(hash, composed).should.eventually.be.true)
+    tests.push(scrypt.verify(hash, withRingAbove).should.eventually.be.true)
+    hash = await scrypt.hash(composed)
+    tests.push(scrypt.verify(hash, withRingAbove).should.eventually.be.true)
+    await Promise.all(tests)
+  })
+  it('works, sync', () => {
+    const angstromChar = '\xC5ngstrom'
+    const composed = 'A\u030Angstrom'
+    const withRingAbove = '\u212Bngstrom'
+    let hash = scrypt.hashSync(angstromChar)
+    scrypt.verifySync(hash, composed).should.be.true
+    scrypt.verifySync(hash, withRingAbove).should.be.true
+    hash = scrypt.hashSync(composed)
+    scrypt.verifySync(hash, withRingAbove).should.be.true
+  })
+})
\ No newline at end of file