diff --git a/src/crypto/public_key/rsa.js b/src/crypto/public_key/rsa.js
index 1c081316c..1b766b0d1 100644
--- a/src/crypto/public_key/rsa.js
+++ b/src/crypto/public_key/rsa.js
@@ -33,7 +33,7 @@ const nodeCrypto = util.getNodeCrypto();
 const asn1 = nodeCrypto ? require('asn1.js') : undefined;
 
 /* eslint-disable no-invalid-this */
-const RSAPrivateKey = util.detectNode() ? asn1.define('RSAPrivateKey', function () {
+const RSAPrivateKey = nodeCrypto ? asn1.define('RSAPrivateKey', function () {
   this.seq().obj( // used for native NodeJS crypto
     this.key('version').int(), // 0
     this.key('modulus').int(), // n
@@ -47,7 +47,7 @@ const RSAPrivateKey = util.detectNode() ? asn1.define('RSAPrivateKey', function
   );
 }) : undefined;
 
-const RSAPublicKey = util.detectNode() ? asn1.define('RSAPubliceKey', function () {
+const RSAPublicKey = nodeCrypto ? asn1.define('RSAPubliceKey', function () {
   this.seq().obj( // used for native NodeJS crypto
     this.key('modulus').int(), // n
     this.key('publicExponent').int(), // e
diff --git a/src/util.js b/src/util.js
index 15b903bbc..f3a57e117 100644
--- a/src/util.js
+++ b/src/util.js
@@ -381,14 +381,6 @@ const util = {
     return typeof globalThis !== 'undefined' && globalThis.crypto && globalThis.crypto.subtle;
   },
 
-  /**
-   * Detect Node.js runtime.
-   */
-  detectNode: function() {
-    return typeof globalThis.process === 'object' &&
-      typeof globalThis.process.versions === 'object';
-  },
-
   /**
    * Detect native BigInt support
    */
@@ -425,12 +417,12 @@ const util = {
   },
 
   getHardwareConcurrency: function() {
-    if (util.detectNode()) {
-      const os = require('os');
-      return os.cpus().length;
+    if (typeof navigator !== 'undefined') {
+      return navigator.hardwareConcurrency || 1;
     }
 
-    return (typeof navigator !== 'undefined' && navigator.hardwareConcurrency) || 1;
+    const os = require('os'); // Assume we're on Node.js.
+    return os.cpus().length;
   },
 
   isEmailAddress: function(data) {
diff --git a/test/general/openpgp.js b/test/general/openpgp.js
index 3f5aadd8b..6fe34246c 100644
--- a/test/general/openpgp.js
+++ b/test/general/openpgp.js
@@ -17,6 +17,8 @@ chai.use(require('chai-as-promised'));
 
 const expect = chai.expect;
 
+const detectNode = () => typeof globalThis.process === 'object' && typeof globalThis.process.versions === 'object';
+
 const pub_key = [
   '-----BEGIN PGP PUBLIC KEY BLOCK-----',
   'Version: GnuPG v2.0.19 (GNU/Linux)',
@@ -2901,7 +2903,7 @@ aOU=
                     expect(e.message).to.match(/Ascii armor integrity check failed/);
                     expect(stepReached).to.equal(
                       j === 0 ? 0 :
-                        (openpgp.config.aeadChunkSizeByte === 0 && (j === 2 || util.detectNode() || util.getHardwareConcurrency() < 8)) || (!openpgp.config.aeadProtect && openpgp.config.allowUnauthenticatedStream) ? 2 :
+                        (openpgp.config.aeadChunkSizeByte === 0 && (j === 2 || detectNode() || util.getHardwareConcurrency() < 8)) || (!openpgp.config.aeadProtect && openpgp.config.allowUnauthenticatedStream) ? 2 :
                           1
                     );
                     return;
diff --git a/test/general/streaming.js b/test/general/streaming.js
index 6839f1f4f..5af963afb 100644
--- a/test/general/streaming.js
+++ b/test/general/streaming.js
@@ -16,6 +16,8 @@ const stream = require('@openpgp/web-stream-tools');
 const useNativeStream = (() => { try { new global.ReadableStream(); return true; } catch (e) { return false; } })(); // eslint-disable-line no-new
 const NodeReadableStream = useNativeStream ? undefined : require('stream').Readable;
 
+const detectNode = () => typeof globalThis.process === 'object' && typeof globalThis.process.versions === 'object';
+
 const pub_key = [
   '-----BEGIN PGP PUBLIC KEY BLOCK-----',
   'Version: GnuPG v2.0.19 (GNU/Linux)',
@@ -889,7 +891,7 @@ function tests() {
 
     it("Don't pull entire input stream when we're not pulling decrypted stream (AEAD)", async function() {
       let coresStub;
-      if (util.detectNode()) {
+      if (detectNode()) {
         coresStub = stub(require('os'), 'cpus');
         coresStub.returns(new Array(2));
         // Object.defineProperty(require('os'), 'cpus', { value: () => [,], configurable: true });
@@ -915,7 +917,7 @@ function tests() {
         await new Promise(resolve => setTimeout(resolve, 3000));
         expect(i).to.be.lessThan(expectedType === 'web' ? 50 : 300);
       } finally {
-        if (util.detectNode()) {
+        if (detectNode()) {
           coresStub.restore();
         } else {
           delete navigator.hardwareConcurrency;
@@ -1012,7 +1014,7 @@ module.exports = () => describe('Streaming', function() {
 
   tests();
 
-  if (util.detectNode()) {
+  if (detectNode()) {
     const fs = require('fs');
 
     it('Node: Encrypt and decrypt text message roundtrip', async function() {