diff --git a/test/pummel/test-crypto-dh-hash-modp18.js b/test/pummel/test-crypto-dh-hash-modp18.js
new file mode 100644
index 00000000000000..288a647bdd321d
--- /dev/null
+++ b/test/pummel/test-crypto-dh-hash-modp18.js
@@ -0,0 +1,42 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+'use strict';
+const common = require('../common');
+if (!common.hasCrypto)
+  common.skip('node compiled without OpenSSL.');
+
+const assert = require('assert');
+const crypto = require('crypto');
+
+const hashes = {
+  modp18: 'a870b491bbbec9b131ae9878d07449d32e54f160'
+};
+
+for (const name in hashes) {
+  const group = crypto.getDiffieHellman(name);
+  const private_key = group.getPrime('hex');
+  const hash1 = hashes[name];
+  const hash2 = crypto.createHash('sha1')
+                    .update(private_key.toUpperCase()).digest('hex');
+  assert.strictEqual(hash1, hash2);
+  assert.strictEqual(group.getGenerator('hex'), '02');
+}
diff --git a/test/pummel/test-crypto-dh-hash.js b/test/pummel/test-crypto-dh-hash.js
index ffe11d1c12491b..7188fbb32b9197 100644
--- a/test/pummel/test-crypto-dh-hash.js
+++ b/test/pummel/test-crypto-dh-hash.js
@@ -35,7 +35,6 @@ const hashes = {
   modp15: '7bdd39e5cdbb9748113933e5c2623b559c534e74',
   modp16: 'daea5277a7ad0116e734a8e0d2f297ef759d1161',
   modp17: '3b62aaf0142c2720f0bf26a9589b0432c00eadc1',
-  modp18: 'a870b491bbbec9b131ae9878d07449d32e54f160'
 };
 
 for (const name in hashes) {