diff --git a/.vscode/launch.json b/.vscode/launch.json
deleted file mode 100644
index 660f37b..0000000
--- a/.vscode/launch.json
+++ /dev/null
@@ -1,26 +0,0 @@
-{
-    // 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 5951c93..c34848c 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)
-    await scrypt.verify(derived, pass).should.eventually.be.true
+    scrypt.verify(derived, pass).should.eventually.be.true
   })
 })
 describe('hashSync() and sync verification', function () {
@@ -31,37 +31,35 @@ describe('hashSync() and sync verification', function () {
 
 describe('hash() error cases', function () {
   it('throws an error when it receives an invalid cost value', async function () {
-    await scrypt
+    scrypt
       .hash('bad password', { cost: 2.3 })
       .should.be.rejectedWith(scrypt.InvalidOptions)
-    await scrypt
+    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 () {
-    await scrypt
+    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 () {
-    await scrypt
+    scrypt
       .hash('bad password', { saltLength: 2.3 })
       .should.be.rejectedWith(scrypt.InvalidOptions)
-    await scrypt
+    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', 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,
-    ])
+  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
   })
 })
 
@@ -104,22 +102,20 @@ describe('hashSync() error cases', function () {
 })
 
 describe('verify() error cases', function () {
-  it('throws an error when the password is not the right thing', async function () {
+  it('throws an error when the password is not the right thing', function () {
     const validHash =
       'e.WCu8zB9FHLhXaAf5Svn7NE4ySqB5X45X.ZLpxVwLz1816kmshqXHn12X_4_lZD_0Yl-27KSLLzdhXJ0Fr2huSD7BvoMlBMOMUQBKyKXPzhKI01_Ot-C_w8g'
-    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,
-    ])
+    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 =
@@ -143,7 +139,7 @@ describe('verify() error cases', function () {
     await checkThrows(1234, TypeError)
     await checkThrows(null, TypeError)
     await checkThrows([1, 2, 3], TypeError)
-    await scrypt.verify(
+    scrypt.verify(
       {
         // This is technically valid, why try to prevent it? 🤷
         split: () => hashParts,
@@ -230,28 +226,3 @@ 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