diff --git a/lib/internal/crypto/keys.js b/lib/internal/crypto/keys.js
index 917853af98a4c3..bb7dd7dbd0d1eb 100644
--- a/lib/internal/crypto/keys.js
+++ b/lib/internal/crypto/keys.js
@@ -696,6 +696,11 @@ ObjectDefineProperties(CryptoKey.prototype, {
   extractable: kEnumerableProperty,
   algorithm: kEnumerableProperty,
   usages: kEnumerableProperty,
+  [SymbolToStringTag]: {
+    __proto__: null,
+    configurable: true,
+    value: 'CryptoKey',
+  },
 });
 
 // All internal code must use new InternalCryptoKey to create
diff --git a/test/parallel/test-webcrypto-keygen.js b/test/parallel/test-webcrypto-keygen.js
index b733762599279a..dceb3348528911 100644
--- a/test/parallel/test-webcrypto-keygen.js
+++ b/test/parallel/test-webcrypto-keygen.js
@@ -278,6 +278,8 @@ const vectors = {
 
     assert.strictEqual(publicKey.type, 'public');
     assert.strictEqual(privateKey.type, 'private');
+    assert.strictEqual(publicKey.toString(), '[object CryptoKey]');
+    assert.strictEqual(privateKey.toString(), '[object CryptoKey]');
     assert.strictEqual(publicKey.extractable, true);
     assert.strictEqual(privateKey.extractable, true);
     assert.deepStrictEqual(publicKey.usages, publicUsages);
@@ -430,6 +432,8 @@ const vectors = {
 
     assert.strictEqual(publicKey.type, 'public');
     assert.strictEqual(privateKey.type, 'private');
+    assert.strictEqual(publicKey.toString(), '[object CryptoKey]');
+    assert.strictEqual(privateKey.toString(), '[object CryptoKey]');
     assert.strictEqual(publicKey.extractable, true);
     assert.strictEqual(privateKey.extractable, true);
     assert.deepStrictEqual(publicKey.usages, publicUsages);
@@ -499,6 +503,7 @@ const vectors = {
     assert(isCryptoKey(key));
 
     assert.strictEqual(key.type, 'secret');
+    assert.strictEqual(key.toString(), '[object CryptoKey]');
     assert.strictEqual(key.extractable, true);
     assert.deepStrictEqual(key.usages, usages);
     assert.strictEqual(key.algorithm.name, name);
@@ -557,6 +562,7 @@ const vectors = {
     assert(isCryptoKey(key));
 
     assert.strictEqual(key.type, 'secret');
+    assert.strictEqual(key.toString(), '[object CryptoKey]');
     assert.strictEqual(key.extractable, true);
     assert.deepStrictEqual(key.usages, usages);
     assert.strictEqual(key.algorithm.name, 'HMAC');
@@ -618,6 +624,8 @@ assert.throws(() => new CryptoKey(), { code: 'ERR_ILLEGAL_CONSTRUCTOR' });
 
     assert.strictEqual(publicKey.type, 'public');
     assert.strictEqual(privateKey.type, 'private');
+    assert.strictEqual(publicKey.toString(), '[object CryptoKey]');
+    assert.strictEqual(privateKey.toString(), '[object CryptoKey]');
     assert.strictEqual(publicKey.extractable, true);
     assert.strictEqual(privateKey.extractable, true);
     assert.deepStrictEqual(publicKey.usages, publicUsages);