diff --git a/test/common/index.js b/test/common/index.js
index 85d11ec0934..f76e1cd38cf 100644
--- a/test/common/index.js
+++ b/test/common/index.js
@@ -589,7 +589,7 @@ exports.isAlive = function isAlive(pid) {
   }
 };
 
-exports.noWarnCode = 'no_expected_warning_code';
+exports.noWarnCode = undefined;
 
 function expectWarning(name, expected) {
   const map = new Map(expected);
@@ -598,14 +598,7 @@ function expectWarning(name, expected) {
     assert.ok(map.has(warning.message),
               `unexpected error message: "${warning.message}"`);
     const code = map.get(warning.message);
-    if (code === undefined) {
-      throw new Error('An error code must be specified or use ' +
-      'common.noWarnCode if there is no error code. The error  ' +
-      `code for this warning was ${warning.code}`);
-    }
-    if (code !== exports.noWarnCode) {
-      assert.strictEqual(warning.code, code);
-    }
+    assert.strictEqual(warning.code, code);
     // Remove a warning message after it is seen so that we guarantee that we
     // get each message only once.
     map.delete(expected);
diff --git a/test/parallel/test-promises-unhandled-symbol-rejections.js b/test/parallel/test-promises-unhandled-symbol-rejections.js
index 5c028a74c24..e5084b50c18 100644
--- a/test/parallel/test-promises-unhandled-symbol-rejections.js
+++ b/test/parallel/test-promises-unhandled-symbol-rejections.js
@@ -6,7 +6,7 @@ const expectedDeprecationWarning = ['Unhandled promise rejections are ' +
                                    'deprecated. In the future, promise ' +
                                    'rejections that are not handled will ' +
                                    'terminate the Node.js process with a ' +
-                                   'non-zero exit code.', common.noWarnCode];
+                                   'non-zero exit code.', 'DEP0018'];
 const expectedPromiseWarning = ['Unhandled promise rejection. ' +
   'This error originated either by throwing ' +
   'inside of an async function without a catch ' +
diff --git a/test/parallel/test-util.js b/test/parallel/test-util.js
index ee2fe917f3e..337cb789f73 100644
--- a/test/parallel/test-util.js
+++ b/test/parallel/test-util.js
@@ -142,10 +142,10 @@ assert.strictEqual(util.isFunction(), false);
 assert.strictEqual(util.isFunction('string'), false);
 
 common.expectWarning('DeprecationWarning', [
-  ['util.print is deprecated. Use console.log instead.', common.noWarnCode],
-  ['util.puts is deprecated. Use console.log instead.', common.noWarnCode],
-  ['util.debug is deprecated. Use console.error instead.', common.noWarnCode],
-  ['util.error is deprecated. Use console.error instead.', common.noWarnCode]
+  ['util.print is deprecated. Use console.log instead.', 'DEP0026'],
+  ['util.puts is deprecated. Use console.log instead.', 'DEP0027'],
+  ['util.debug is deprecated. Use console.error instead.', 'DEP0028'],
+  ['util.error is deprecated. Use console.error instead.', 'DEP0029']
 ]);
 
 util.print('test');