diff --git a/src/crypto/crypto.js b/src/crypto/crypto.js
index 6662ee5a..f198d9d5 100644
--- a/src/crypto/crypto.js
+++ b/src/crypto/crypto.js
@@ -367,8 +367,7 @@ export async function getPrefixRandom(algo) {
  * Generating a session key for the specified symmetric algorithm
  * See {@link https://tools.ietf.org/html/rfc4880#section-9.2|RFC 4880 9.2} for algorithms.
  * @param {module:enums.symmetric} algo - Symmetric encryption algorithm
- * @returns {Promise<Uint8Array>} Random bytes as a string to be used as a key.
- * @async
+ * @returns {Uint8Array} Random bytes as a string to be used as a key.
  */
 export function generateSessionKey(algo) {
   const { keySize } = getCipher(algo);
diff --git a/src/crypto/pkcs1.js b/src/crypto/pkcs1.js
index cfda49d7..db981322 100644
--- a/src/crypto/pkcs1.js
+++ b/src/crypto/pkcs1.js
@@ -50,14 +50,13 @@ hash_headers[11] = [0x30, 0x2d, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01,
  * Create padding with secure random data
  * @private
  * @param {Integer} length - Length of the padding in bytes
- * @returns {Promise<Uint8Array>} Random padding.
- * @async
+ * @returns {Uint8Array} Random padding.
  */
-async function getPKCS1Padding(length) {
+function getPKCS1Padding(length) {
   const result = new Uint8Array(length);
   let count = 0;
   while (count < length) {
-    const randomBytes = await getRandomBytes(length - count);
+    const randomBytes = getRandomBytes(length - count);
     for (let i = 0; i < randomBytes.length; i++) {
       if (randomBytes[i] !== 0) {
         result[count++] = randomBytes[i];
@@ -72,10 +71,9 @@ async function getPKCS1Padding(length) {
  * @see {@link https://tools.ietf.org/html/rfc4880#section-13.1.1|RFC 4880 13.1.1}
  * @param {Uint8Array} message - Message to be encoded
  * @param {Integer} keyLength - The length in octets of the key modulus
- * @returns {Promise<Uint8Array>} EME-PKCS1 padded message.
- * @async
+ * @returns {Uint8Array} EME-PKCS1 padded message.
  */
-export async function emeEncode(message, keyLength) {
+export function emeEncode(message, keyLength) {
   const mLength = message.length;
   // length checking
   if (mLength > keyLength - 11) {
@@ -83,7 +81,7 @@ export async function emeEncode(message, keyLength) {
   }
   // Generate an octet string PS of length k - mLen - 3 consisting of
   // pseudo-randomly generated nonzero octets
-  const PS = await getPKCS1Padding(keyLength - mLength - 3);
+  const PS = getPKCS1Padding(keyLength - mLength - 3);
   // Concatenate PS, the message M, and other padding to form an
   // encoded message EM of length k octets as EM = 0x00 || 0x02 || PS || 0x00 || M.
   const encoded = new Uint8Array(keyLength);
diff --git a/src/crypto/public_key/elgamal.js b/src/crypto/public_key/elgamal.js
index 6969ef00..bcd41efe 100644
--- a/src/crypto/public_key/elgamal.js
+++ b/src/crypto/public_key/elgamal.js
@@ -41,7 +41,7 @@ export async function encrypt(data, p, g, y) {
   g = new BigInteger(g);
   y = new BigInteger(y);
 
-  const padded = await emeEncode(data, p.byteLength());
+  const padded = emeEncode(data, p.byteLength());
   const m = new BigInteger(padded);
 
   // OpenPGP uses a "special" version of ElGamal where g is generator of the full group Z/pZ*
diff --git a/src/crypto/public_key/elliptic/curves.js b/src/crypto/public_key/elliptic/curves.js
index 42ee1047..4a77d48f 100644
--- a/src/crypto/public_key/elliptic/curves.js
+++ b/src/crypto/public_key/elliptic/curves.js
@@ -182,7 +182,7 @@ class Curve {
       case 'node':
         return nodeGenKeyPair(this.name);
       case 'curve25519': {
-        const privateKey = await getRandomBytes(32);
+        const privateKey = getRandomBytes(32);
         privateKey[0] = (privateKey[0] & 127) | 64;
         privateKey[31] &= 248;
         const secretKey = privateKey.slice().reverse();
@@ -191,7 +191,7 @@ class Curve {
         return { publicKey, privateKey };
       }
       case 'ed25519': {
-        const privateKey = await getRandomBytes(32);
+        const privateKey = getRandomBytes(32);
         const keyPair = nacl.sign.keyPair.fromSeed(privateKey);
         const publicKey = util.concatUint8Array([new Uint8Array([0x40]), keyPair.publicKey]);
         return { publicKey, privateKey };
@@ -199,7 +199,7 @@ class Curve {
     }
     const indutnyCurve = await getIndutnyCurve(this.name);
     keyPair = await indutnyCurve.genKeyPair({
-      entropy: util.uint8ArrayToString(await getRandomBytes(32))
+      entropy: util.uint8ArrayToString(getRandomBytes(32))
     });
     return { publicKey: new Uint8Array(keyPair.getPublic('array', false)), privateKey: keyPair.getPrivate().toArrayLike(Uint8Array) };
   }
diff --git a/src/crypto/public_key/elliptic/ecdh.js b/src/crypto/public_key/elliptic/ecdh.js
index 6a56f1e2..b0f183f5 100644
--- a/src/crypto/public_key/elliptic/ecdh.js
+++ b/src/crypto/public_key/elliptic/ecdh.js
@@ -94,7 +94,7 @@ async function kdf(hashAlgo, X, length, param, stripLeading = false, stripTraili
 async function genPublicEphemeralKey(curve, Q) {
   switch (curve.type) {
     case 'curve25519': {
-      const d = await getRandomBytes(32);
+      const d = getRandomBytes(32);
       const { secretKey, sharedKey } = await genPrivateEphemeralKey(curve, Q, null, d);
       let { publicKey } = nacl.box.keyPair.fromSecretKey(secretKey);
       publicKey = util.concatUint8Array([new Uint8Array([0x40]), publicKey]);
diff --git a/src/crypto/public_key/elliptic/ecdsa.js b/src/crypto/public_key/elliptic/ecdsa.js
index a4a396b0..528ddcf7 100644
--- a/src/crypto/public_key/elliptic/ecdsa.js
+++ b/src/crypto/public_key/elliptic/ecdsa.js
@@ -136,7 +136,7 @@ export async function validateParams(oid, Q, d) {
   switch (curve.type) {
     case 'web':
     case 'node': {
-      const message = await getRandomBytes(8);
+      const message = getRandomBytes(8);
       const hashAlgo = enums.hash.sha256;
       const hashed = await hash.digest(hashAlgo, message);
       try {
diff --git a/src/crypto/public_key/rsa.js b/src/crypto/public_key/rsa.js
index 1b766b0d..eab8a810 100644
--- a/src/crypto/public_key/rsa.js
+++ b/src/crypto/public_key/rsa.js
@@ -433,7 +433,7 @@ async function nodeEncrypt(data, n, e) {
 async function bnEncrypt(data, n, e) {
   const BigInteger = await util.getBigInteger();
   n = new BigInteger(n);
-  data = new BigInteger(await emeEncode(data, n.byteLength()));
+  data = new BigInteger(emeEncode(data, n.byteLength()));
   e = new BigInteger(e);
   if (data.gte(n)) {
     throw new Error('Message size cannot exceed modulus size');
diff --git a/src/crypto/random.js b/src/crypto/random.js
index a2f92cfe..9d3afe80 100644
--- a/src/crypto/random.js
+++ b/src/crypto/random.js
@@ -26,88 +26,18 @@ import util from '../util';
 
 const nodeCrypto = util.getNodeCrypto();
 
-/**
- * Buffer for secure random numbers
- */
-class RandomBuffer {
-  constructor() {
-    this.buffer = null;
-    this.size = null;
-    this.callback = null;
-  }
-
-  /**
-   * Initialize buffer
-   * @param {Integer} size - size of buffer
-   */
-  init(size, callback) {
-    this.buffer = new Uint8Array(size);
-    this.size = 0;
-    this.callback = callback;
-  }
-
-  /**
-   * Concat array of secure random numbers to buffer
-   * @param {Uint8Array} buf
-   */
-  set(buf) {
-    if (!this.buffer) {
-      throw new Error('RandomBuffer is not initialized');
-    }
-    if (!(buf instanceof Uint8Array)) {
-      throw new Error('Invalid type: buf not an Uint8Array');
-    }
-    const freeSpace = this.buffer.length - this.size;
-    if (buf.length > freeSpace) {
-      buf = buf.subarray(0, freeSpace);
-    }
-    // set buf with offset old size of buffer
-    this.buffer.set(buf, this.size);
-    this.size += buf.length;
-  }
-
-  /**
-   * Take numbers out of buffer and copy to array
-   * @param {Uint8Array} buf - The destination array
-   */
-  async get(buf) {
-    if (!this.buffer) {
-      throw new Error('RandomBuffer is not initialized');
-    }
-    if (!(buf instanceof Uint8Array)) {
-      throw new Error('Invalid type: buf not an Uint8Array');
-    }
-    if (this.size < buf.length) {
-      if (!this.callback) {
-        throw new Error('Random number buffer depleted');
-      }
-      // Wait for random bytes from main context, then try again
-      await this.callback();
-      return this.get(buf);
-    }
-    for (let i = 0; i < buf.length; i++) {
-      buf[i] = this.buffer[--this.size];
-      // clear buffer value
-      this.buffer[this.size] = 0;
-    }
-  }
-}
-
 /**
  * Retrieve secure random byte array of the specified length
  * @param {Integer} length - Length in bytes to generate
- * @returns {Promise<Uint8Array>} Random byte array.
- * @async
+ * @returns {Uint8Array} Random byte array.
  */
-export async function getRandomBytes(length) {
+export function getRandomBytes(length) {
   const buf = new Uint8Array(length);
   if (typeof crypto !== 'undefined' && crypto.getRandomValues) {
     crypto.getRandomValues(buf);
   } else if (nodeCrypto) {
     const bytes = nodeCrypto.randomBytes(buf.length);
     buf.set(bytes);
-  } else if (randomBuffer.buffer) {
-    await randomBuffer.get(buf);
   } else {
     throw new Error('No secure random number generator available.');
   }
@@ -137,5 +67,3 @@ export async function getRandomBigInteger(min, max) {
   const r = new BigInteger(await getRandomBytes(bytes + 8));
   return r.mod(modulus).add(min);
 }
-
-export const randomBuffer = new RandomBuffer();
diff --git a/src/message.js b/src/message.js
index 52de88e1..6ce002b4 100644
--- a/src/message.js
+++ b/src/message.js
@@ -241,7 +241,7 @@ export class Message {
                 pkeskPacketCopy.read(serialisedPKESK);
                 const randomSessionKey = {
                   sessionKeyAlgorithm,
-                  sessionKey: await crypto.generateSessionKey(sessionKeyAlgorithm)
+                  sessionKey: crypto.generateSessionKey(sessionKeyAlgorithm)
                 };
                 try {
                   await pkeskPacketCopy.decrypt(decryptionKeyPacket, randomSessionKey);
@@ -345,7 +345,7 @@ export class Message {
       enums.read(enums.aead, await getPreferredAlgo('aead', encryptionKeys, date, userIDs, config)) :
       undefined;
 
-    const sessionKeyData = await crypto.generateSessionKey(algo);
+    const sessionKeyData = crypto.generateSessionKey(algo);
     return { data: sessionKeyData, algorithm: algorithmName, aeadAlgorithm: aeadAlgorithmName };
   }
 
diff --git a/src/packet/aead_encrypted_data.js b/src/packet/aead_encrypted_data.js
index 01a305f7..3e24323b 100644
--- a/src/packet/aead_encrypted_data.js
+++ b/src/packet/aead_encrypted_data.js
@@ -119,7 +119,7 @@ class AEADEncryptedDataPacket {
     this.cipherAlgorithm = sessionKeyAlgorithm;
 
     const { ivLength } = crypto.getAEADMode(this.aeadAlgorithm);
-    this.iv = await crypto.random.getRandomBytes(ivLength); // generate new random IV
+    this.iv = crypto.random.getRandomBytes(ivLength); // generate new random IV
     this.chunkSizeByte = config.aeadChunkSizeByte;
     const data = this.packets.write();
     this.encrypted = await this.crypt('encrypt', key, data);
diff --git a/src/packet/secret_key.js b/src/packet/secret_key.js
index 02b5631f..8f9b0219 100644
--- a/src/packet/secret_key.js
+++ b/src/packet/secret_key.js
@@ -283,13 +283,13 @@ class SecretKeyPacket extends PublicKeyPacket {
     }
 
     this.s2k = new S2K(config);
-    this.s2k.salt = await crypto.random.getRandomBytes(8);
+    this.s2k.salt = crypto.random.getRandomBytes(8);
     const cleartext = crypto.serializeParams(this.algorithm, this.privateParams);
     this.symmetric = enums.symmetric.aes256;
     const key = await produceEncryptionKey(this.s2k, passphrase, this.symmetric);
 
     const { blockSize } = crypto.getCipher(this.symmetric);
-    this.iv = await crypto.random.getRandomBytes(blockSize);
+    this.iv = crypto.random.getRandomBytes(blockSize);
 
     if (config.aeadProtect) {
       this.s2kUsage = 253;
diff --git a/src/packet/sym_encrypted_session_key.js b/src/packet/sym_encrypted_session_key.js
index ca8acba3..a383c711 100644
--- a/src/packet/sym_encrypted_session_key.js
+++ b/src/packet/sym_encrypted_session_key.js
@@ -179,18 +179,18 @@ class SymEncryptedSessionKeyPacket {
     this.sessionKeyEncryptionAlgorithm = algo;
 
     this.s2k = new S2K(config);
-    this.s2k.salt = await crypto.random.getRandomBytes(8);
+    this.s2k.salt = crypto.random.getRandomBytes(8);
 
     const { blockSize, keySize } = crypto.getCipher(algo);
     const encryptionKey = await this.s2k.produceKey(passphrase, keySize);
 
     if (this.sessionKey === null) {
-      this.sessionKey = await crypto.generateSessionKey(this.sessionKeyAlgorithm);
+      this.sessionKey = crypto.generateSessionKey(this.sessionKeyAlgorithm);
     }
 
     if (this.version === 5) {
       const mode = crypto.getAEADMode(this.aeadAlgorithm);
-      this.iv = await crypto.random.getRandomBytes(mode.ivLength); // generate new random IV
+      this.iv = crypto.random.getRandomBytes(mode.ivLength); // generate new random IV
       const associatedData = new Uint8Array([0xC0 | SymEncryptedSessionKeyPacket.tag, this.version, this.sessionKeyEncryptionAlgorithm, this.aeadAlgorithm]);
       const modeInstance = await mode(algo, encryptionKey);
       this.encrypted = await modeInstance.encrypt(this.sessionKey, this.iv, associatedData);
diff --git a/test/crypto/crypto.js b/test/crypto/crypto.js
index 66326eaf..6d2b63cc 100644
--- a/test/crypto/crypto.js
+++ b/test/crypto/crypto.js
@@ -242,7 +242,7 @@ module.exports = () => describe('API functional testing', function() {
       await Promise.all(symmAlgoNames.map(async function(algoName) {
         const algo = openpgp.enums.write(openpgp.enums.symmetric, algoName);
         const { blockSize } = crypto.getCipher(algo);
-        const symmKey = await crypto.generateSessionKey(algo);
+        const symmKey = crypto.generateSessionKey(algo);
         const IV = new Uint8Array(blockSize);
         const symmencData = await crypto.mode.cfb.encrypt(algo, symmKey, util.stringToUint8Array(plaintext), IV, config);
         const text = util.uint8ArrayToString(await crypto.mode.cfb.decrypt(algo, symmKey, symmencData, new Uint8Array(blockSize)));
@@ -269,8 +269,8 @@ module.exports = () => describe('API functional testing', function() {
 
     });
 
-    it('Asymmetric using RSA with eme_pkcs1 padding', async function () {
-      const symmKey = await crypto.generateSessionKey(openpgp.enums.symmetric.aes256);
+    it('Asymmetric using RSA with eme_pkcs1 padding', function () {
+      const symmKey = crypto.generateSessionKey(openpgp.enums.symmetric.aes256);
       return crypto.publicKeyEncrypt(algoRSA, RSAPublicParams, symmKey).then(RSAEncryptedData => {
         return crypto.publicKeyDecrypt(
           algoRSA, RSAPublicParams, RSAPrivateParams, RSAEncryptedData
@@ -280,8 +280,8 @@ module.exports = () => describe('API functional testing', function() {
       });
     });
 
-    it('Asymmetric using Elgamal with eme_pkcs1 padding', async function () {
-      const symmKey = await crypto.generateSessionKey(openpgp.enums.symmetric.aes256);
+    it('Asymmetric using Elgamal with eme_pkcs1 padding', function () {
+      const symmKey = crypto.generateSessionKey(openpgp.enums.symmetric.aes256);
       return crypto.publicKeyEncrypt(algoElGamal, elGamalPublicParams, symmKey).then(ElgamalEncryptedData => {
         return crypto.publicKeyDecrypt(
           algoElGamal, elGamalPublicParams, elGamalPrivateParams, ElgamalEncryptedData
diff --git a/test/crypto/gcm.js b/test/crypto/gcm.js
index 0ffc40cb..5101a4c6 100644
--- a/test/crypto/gcm.js
+++ b/test/crypto/gcm.js
@@ -45,8 +45,8 @@ module.exports = () => describe('Symmetric AES-GCM (experimental)', function() {
           this.skip(); // eslint-disable-line no-invalid-this
         }
         const algo = openpgp.enums.write(openpgp.enums.symmetric, algoName);
-        const key = await crypto.generateSessionKey(algo);
-        const iv = await crypto.random.getRandomBytes(crypto.mode.gcm.ivLength);
+        const key = crypto.generateSessionKey(algo);
+        const iv = crypto.random.getRandomBytes(crypto.mode.gcm.ivLength);
 
         const nativeEncryptSpy = webCrypto ? sinonSandbox.spy(webCrypto, 'encrypt') : sinonSandbox.spy(nodeCrypto, 'createCipheriv');
         const nativeDecryptSpy = webCrypto ? sinonSandbox.spy(webCrypto, 'decrypt') : sinonSandbox.spy(nodeCrypto, 'createDecipheriv');
diff --git a/test/crypto/index.js b/test/crypto/index.js
index 6b828b4e..4bc3adf0 100644
--- a/test/crypto/index.js
+++ b/test/crypto/index.js
@@ -1,7 +1,6 @@
 module.exports = () => describe('Crypto', function () {
   require('./cipher')();
   require('./hash')();
-  require('./random.js')();
   require('./crypto.js')();
   require('./elliptic.js')();
   require('./ecdh.js')();
diff --git a/test/crypto/random.js b/test/crypto/random.js
deleted file mode 100644
index 2b76ce45..00000000
--- a/test/crypto/random.js
+++ /dev/null
@@ -1,79 +0,0 @@
-const random = require('../../src/crypto/random');
-
-const chai = require('chai');
-
-const { expect } = chai;
-
-module.exports = () => describe('Random Buffer', function() {
-  let randomBuffer;
-
-  before(function() {
-    randomBuffer = new random.randomBuffer.constructor();
-    expect(randomBuffer).to.exist;
-  });
-
-  it('Throw error if not initialized', async function () {
-    expect(randomBuffer.set.bind(randomBuffer)).to.throw('RandomBuffer is not initialized');
-    await expect(randomBuffer.get(new Uint8Array(1))).to.eventually.be.rejectedWith('RandomBuffer is not initialized');
-  });
-
-  it('Initialization', function () {
-    randomBuffer.init(5);
-    expect(randomBuffer.buffer).to.exist;
-    expect(randomBuffer.buffer).to.have.length(5);
-    expect(randomBuffer.size).to.equal(0);
-  });
-
-  function equal(buf, arr) {
-    for (let i = 0; i < buf.length; i++) {
-      if (buf[i] !== arr[i]) {
-        return false;
-      }
-    }
-    return true;
-  }
-
-  it('Set Method', function () {
-    randomBuffer.init(5);
-    let buf = new Uint32Array(2);
-    expect(randomBuffer.set.bind(randomBuffer, buf)).to.throw('Invalid type: buf not an Uint8Array');
-    buf = new Uint8Array(2);
-    buf[0] = 1; buf[1] = 2;
-    randomBuffer.set(buf);
-    expect(equal(randomBuffer.buffer, [1,2,0,0,0])).to.be.true;
-    expect(randomBuffer.size).to.equal(2);
-    randomBuffer.set(buf);
-    expect(equal(randomBuffer.buffer, [1,2,1,2,0])).to.be.true;
-    expect(randomBuffer.size).to.equal(4);
-    randomBuffer.set(buf);
-    expect(equal(randomBuffer.buffer, [1,2,1,2,1])).to.be.true;
-    expect(randomBuffer.size).to.equal(5);
-    randomBuffer.init(1);
-    buf = new Uint8Array(2);
-    buf[0] = 1; buf[1] = 2;
-    randomBuffer.set(buf);
-    expect(buf).to.to.have.property('0', 1);
-    expect(randomBuffer.size).to.equal(1);
-  });
-
-  it('Get Method', async function () {
-    randomBuffer.init(5);
-    let buf = new Uint8Array(5);
-    buf[0] = 1; buf[1] = 2; buf[2] = 5; buf[3] = 7; buf[4] = 8;
-    randomBuffer.set(buf);
-    buf = new Uint32Array(2);
-    await expect(randomBuffer.get(buf)).to.eventually.be.rejectedWith('Invalid type: buf not an Uint8Array');
-    buf = new Uint8Array(2);
-    randomBuffer.get(buf);
-    expect(equal(randomBuffer.buffer, [1,2,5,0,0])).to.be.true;
-    expect(randomBuffer.size).to.equal(3);
-    expect(buf).to.to.have.property('0', 8);
-    expect(buf).to.to.have.property('1', 7);
-    randomBuffer.get(buf);
-    expect(buf).to.to.have.property('0', 5);
-    expect(buf).to.to.have.property('1', 2);
-    expect(equal(randomBuffer.buffer, [1,0,0,0,0])).to.be.true;
-    expect(randomBuffer.size).to.equal(1);
-    await expect(randomBuffer.get(buf)).to.eventually.be.rejectedWith('Random number buffer depleted');
-  });
-});
diff --git a/test/crypto/rsa.js b/test/crypto/rsa.js
index bc1f4198..bc2e81c9 100644
--- a/test/crypto/rsa.js
+++ b/test/crypto/rsa.js
@@ -65,7 +65,7 @@ module.exports = () => describe('basic RSA cryptography', function () {
   it('sign and verify using generated key params', async function() {
     const bits = 1024;
     const { publicParams, privateParams } = await crypto.generateParams(openpgp.enums.publicKey.rsaSign, bits);
-    const message = await random.getRandomBytes(64);
+    const message = random.getRandomBytes(64);
     const hashAlgo = openpgp.enums.write(openpgp.enums.hash, 'sha256');
     const hashed = await crypto.hash.digest(hashAlgo, message);
     const { n, e, d, p, q, u } = { ...publicParams, ...privateParams };
@@ -79,7 +79,7 @@ module.exports = () => describe('basic RSA cryptography', function () {
     const bits = 1024;
     const { publicParams, privateParams } = await crypto.generateParams(openpgp.enums.publicKey.rsaSign, bits);
     const { n, e, d, p, q, u } = { ...publicParams, ...privateParams };
-    const message = await crypto.generateSessionKey(openpgp.enums.symmetric.aes256);
+    const message = crypto.generateSessionKey(openpgp.enums.symmetric.aes256);
     const encrypted = await crypto.publicKey.rsa.encrypt(message, n, e);
     const decrypted = await crypto.publicKey.rsa.decrypt(encrypted, n, e, d, p, q, u);
     expect(decrypted).to.deep.equal(message);
@@ -92,7 +92,7 @@ module.exports = () => describe('basic RSA cryptography', function () {
     const bits = 1024;
     const { publicParams, privateParams } = await crypto.generateParams(openpgp.enums.publicKey.rsaSign, bits);
     const { n, e, d, p, q, u } = { ...publicParams, ...privateParams };
-    const message = await crypto.generateSessionKey(openpgp.enums.symmetric.aes256);
+    const message = crypto.generateSessionKey(openpgp.enums.symmetric.aes256);
     disableNative();
     const encryptedBn = await crypto.publicKey.rsa.encrypt(message, n, e);
     enableNative();
@@ -108,7 +108,7 @@ module.exports = () => describe('basic RSA cryptography', function () {
     const bits = 1024;
     const { publicParams, privateParams } = await crypto.generateParams(openpgp.enums.publicKey.rsaSign, bits);
     const { n, e, d, p, q, u } = { ...publicParams, ...privateParams };
-    const message = await random.getRandomBytes(64);
+    const message = random.getRandomBytes(64);
     const hashName = 'sha256';
     const hashAlgo = openpgp.enums.write(openpgp.enums.hash, hashName);
     const hashed = await crypto.hash.digest(hashAlgo, message);
@@ -123,7 +123,7 @@ module.exports = () => describe('basic RSA cryptography', function () {
     const bits = 1024;
     const { publicParams, privateParams } = await crypto.generateParams(openpgp.enums.publicKey.rsaSign, bits);
     const { n, e, d, p, q, u } = { ...publicParams, ...privateParams };
-    const message = await random.getRandomBytes(64);
+    const message = random.getRandomBytes(64);
     const hashName = 'sha256';
     const hashAlgo = openpgp.enums.write(openpgp.enums.hash, hashName);
     const hashed = await crypto.hash.digest(hashAlgo, message);
diff --git a/test/general/biginteger.js b/test/general/biginteger.js
index 2a0adc88..0b4587ab 100644
--- a/test/general/biginteger.js
+++ b/test/general/biginteger.js
@@ -15,7 +15,7 @@ async function getRandomBN(min, max) {
 
   const modulus = max.sub(min);
   const bytes = modulus.byteLength();
-  const r = new BN(await random.getRandomBytes(bytes + 8));
+  const r = new BN(random.getRandomBytes(bytes + 8));
   return r.mod(modulus).add(min);
 }
 
diff --git a/test/general/openpgp.js b/test/general/openpgp.js
index f2f56e18..90945652 100644
--- a/test/general/openpgp.js
+++ b/test/general/openpgp.js
@@ -2419,7 +2419,7 @@ aOU=
 
         it('should encrypt using custom session key and decrypt using session key', async function () {
           const sessionKey = {
-            data: await crypto.generateSessionKey(openpgp.enums.symmetric.aes256),
+            data: crypto.generateSessionKey(openpgp.enums.symmetric.aes256),
             algorithm: 'aes256'
           };
           const encOpt = {
@@ -2442,7 +2442,7 @@ aOU=
 
         it('should encrypt using custom session key and decrypt using private key', async function () {
           const sessionKey = {
-            data: await crypto.generateSessionKey(openpgp.enums.symmetric.aes128),
+            data: crypto.generateSessionKey(openpgp.enums.symmetric.aes128),
             algorithm: 'aes128'
           };
           const encOpt = {
@@ -3140,9 +3140,9 @@ aOU=
             await stream.loadStreamsPonyfill();
             const ReadableStream = useNativeStream ? global.ReadableStream : stream.ReadableStream;
             const data = new ReadableStream({
-              async pull(controller) {
+              pull(controller) {
                 if (i++ < 4) {
-                  const randomBytes = await random.getRandomBytes(10);
+                  const randomBytes = random.getRandomBytes(10);
                   controller.enqueue(randomBytes);
                   plaintext.push(randomBytes.slice());
                 } else {
diff --git a/test/general/streaming.js b/test/general/streaming.js
index 5af963af..d79e8204 100644
--- a/test/general/streaming.js
+++ b/test/general/streaming.js
@@ -977,7 +977,7 @@ module.exports = () => describe('Streaming', function() {
         if (test === currentTest && i < (expectedType === 'web' ? 100 : 500)) {
           i++;
           if (i === 4) await dataArrivedPromise;
-          const randomBytes = await random.getRandomBytes(1024);
+          const randomBytes = random.getRandomBytes(1024);
           controller.enqueue(randomBytes);
           plaintext.push(randomBytes);
         } else {
@@ -997,7 +997,7 @@ module.exports = () => describe('Streaming', function() {
           if (test === currentTest && i < (expectedType === 'web' ? 100 : 500)) {
             i++;
             if (i === 4) await dataArrivedPromise;
-            const randomBytes = await random.getRandomBytes(1024);
+            const randomBytes = random.getRandomBytes(1024);
             plaintext.push(randomBytes);
             if (!this.push(randomBytes)) break;
           } else {