diff --git a/test/pummel/test-crypto-dh.js b/test/pummel/test-crypto-dh.js
index 268496380f4c3a..064ce3c7f597d8 100644
--- a/test/pummel/test-crypto-dh.js
+++ b/test/pummel/test-crypto-dh.js
@@ -9,15 +9,32 @@ try {
   return;
 }
 
-assert.throws(function() {
-  crypto.getDiffieHellman('unknown-group');
-});
-assert.throws(function() {
-  crypto.getDiffieHellman('modp1').setPrivateKey('');
-});
-assert.throws(function() {
-  crypto.getDiffieHellman('modp1').setPublicKey('');
-});
+assert.throws(
+  function() {
+    crypto.getDiffieHellman('unknown-group');
+  },
+  /^Error: Unknown group$/,
+  'crypto.getDiffieHellman(\'unknown-group\') ' +
+  'failed to throw the expected error.'
+);
+assert.throws(
+  function() {
+    crypto.getDiffieHellman('modp1').setPrivateKey('');
+  },
+  new RegExp('^TypeError: crypto\\.getDiffieHellman\\(\\.\\.\\.\\)\\.' +
+  'setPrivateKey is not a function$'),
+  'crypto.getDiffieHellman(\'modp1\').setPrivateKey(\'\') ' +
+  'failed to throw the expected error.'
+);
+assert.throws(
+  function() {
+    crypto.getDiffieHellman('modp1').setPublicKey('');
+  },
+  new RegExp('^TypeError: crypto\\.getDiffieHellman\\(\\.\\.\\.\\)\\.' +
+  'setPublicKey is not a function$'),
+  'crypto.getDiffieHellman(\'modp1\').setPublicKey(\'\') ' +
+  'failed to throw the expected error.'
+);
 
 var hashes = {
   modp1: '630e9acd2cc63f7e80d8507624ba60ac0757201a',