diff --git a/test/common/chromium-cdp-driver.js b/test/common/chromium-cdp-driver.js
index eecbfda906df..3a512e4850cf 100755
--- a/test/common/chromium-cdp-driver.js
+++ b/test/common/chromium-cdp-driver.js
@@ -72,7 +72,11 @@ function stringifyConsoleArg(arg) {
     try {
         if (arg.type === 'string')
             return arg.value;
-        if (arg.type === 'object') {
+        if (arg.type === 'undefined')
+            return "undefined";
+        if (arg.value === null)
+            return "null";
+        if (type === 'object') {
             const obj = {};
             arg.preview.properties.forEach(prop => {
                 obj[prop.name] = prop.value.toString();