diff --git a/test/specs/run-spec.js b/test/specs/run-spec.js
index 3af0aa4565..94080aae00 100644
--- a/test/specs/run-spec.js
+++ b/test/specs/run-spec.js
@@ -1,4 +1,60 @@
+'use strict';
+
+function node4Polyfills() {
+  // https://github.com/uxitten/polyfill/blob/master/string.polyfill.js
+  // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/padEnd
+  if (!String.prototype.padEnd) {
+    // eslint-disable-next-line no-extend-native
+    String.prototype.padEnd = function padEnd(targetLength, padString) {
+      targetLength = targetLength >> 0; // floor if number or convert non-number to 0;
+      padString = String((typeof padString !== 'undefined' ? padString : ' '));
+      if (this.length > targetLength) {
+        return String(this);
+      } else {
+        targetLength = targetLength - this.length;
+        if (targetLength > padString.length) {
+          padString += padString.repeat(targetLength / padString.length); // append to original to ensure we are longer than needed
+        }
+        return String(this) + padString.slice(0, targetLength);
+      }
+    };
+  }
+
+  // https://github.com/uxitten/polyfill/blob/master/string.polyfill.js
+  // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/padStart
+  if (!String.prototype.padStart) {
+    // eslint-disable-next-line no-extend-native
+    String.prototype.padStart = function padStart(targetLength, padString) {
+      targetLength = targetLength >> 0; // truncate if number, or convert non-number to 0;
+      padString = String(typeof padString !== 'undefined' ? padString : ' ');
+      if (this.length >= targetLength) {
+        return String(this);
+      } else {
+        targetLength = targetLength - this.length;
+        if (targetLength > padString.length) {
+          padString += padString.repeat(targetLength / padString.length); // append to original to ensure we are longer than needed
+        }
+        return padString.slice(0, targetLength) + String(this);
+      }
+    };
+  }
+}
+
+function outputCompletionTable(title, specs, longestName, maxSpecs) {
+  const maxSpecsLen = ('' + maxSpecs).length;
+  const spaces = maxSpecsLen * 2 + longestName + 11;
+  console.log('-'.padEnd(spaces + 4, '-'));
+  console.log(`| ${title.padStart(Math.ceil((spaces + title.length) / 2)).padEnd(spaces)} |`);
+  console.log(`| ${' '.padEnd(spaces)} |`);
+  for (const section in specs) {
+    console.log(`| ${section.padEnd(longestName)} ${('' + specs[section].pass).padStart(maxSpecsLen)} of ${('' + specs[section].total).padStart(maxSpecsLen)} ${(100 * specs[section].pass / specs[section].total).toFixed().padStart(4)}% |`);
+  }
+  console.log('-'.padEnd(spaces + 4, '-'));
+  console.log();
+}
+
 function runSpecs(title, file, options) {
+  options = options || {};
   const json = require(file);
   let longestName = 0;
   let maxSpecs = 0;
@@ -20,19 +76,13 @@ function runSpecs(title, file, options) {
     return obj;
   }, {});
 
+  outputCompletionTable(title, specs, longestName, maxSpecs);
+
   describe(title, () => {
-    const maxSpecsLen = ('' + maxSpecs).length;
-    const spaces = maxSpecsLen * 2 + longestName + 11;
-    console.log('-'.padEnd(spaces + 4, '-'));
-    console.log(`| ${title.padStart(Math.ceil((spaces + title.length) / 2)).padEnd(spaces)} |`);
-    console.log(`| ${' '.padEnd(spaces)} |`);
     Object.keys(specs).forEach(section => {
-      console.log(`| ${section.padEnd(longestName)} ${('' + specs[section].pass).padStart(maxSpecsLen)} of ${('' + specs[section].total).padStart(maxSpecsLen)} ${(100 * specs[section].pass / specs[section].total).toFixed().padStart(4)}% |`);
       describe(section, () => {
         specs[section].specs.forEach((spec) => {
-          if (options) {
-            spec.options = Object.assign({}, options, (spec.options || {}));
-          }
+          spec.options = Object.assign({}, options, (spec.options || {}));
           (spec.only ? fit : it)('should ' + (spec.shouldFail ? 'fail' : 'pass') + ' example ' + spec.example, () => {
             if (spec.shouldFail) {
               expect(spec).not.toRender(spec.html);
@@ -43,10 +93,10 @@ function runSpecs(title, file, options) {
         });
       });
     });
-    console.log('-'.padEnd(spaces + 4, '-'));
-    console.log();
   });
 };
 
+node4Polyfills();
+
 runSpecs('GFM 0.29', './gfm/gfm.0.29.json', {gfm: true});
 runSpecs('CommonMark 0.29', './commonmark/commonmark.0.29.json', {headerIds: false});