diff --git a/test/parallel/test-crypto-classes.js b/test/parallel/test-crypto-classes.js
index 3923cb0dc7cfa8..78d248c2b2850c 100644
--- a/test/parallel/test-crypto-classes.js
+++ b/test/parallel/test-crypto-classes.js
@@ -25,6 +25,7 @@ const TEST_CASES = {
 if (!common.hasFipsCrypto) {
   TEST_CASES.Cipher = ['aes192', 'secret'];
   TEST_CASES.Decipher = ['aes192', 'secret'];
+  TEST_CASES.DiffieHellman = [256];
 }
 
 for (const [clazz, args] of Object.entries(TEST_CASES)) {