diff --git a/lib/consts.js b/lib/consts.js
new file mode 100644
index 0000000..1a6573f
--- /dev/null
+++ b/lib/consts.js
@@ -0,0 +1,7 @@
+const DEFAULT_POLL_VALUE = 60;
+const POLL_LOWER_LIMIT = 20;
+ 
+module.exports = {
+  DEFAULT_POLL_VALUE,
+  POLL_LOWER_LIMIT
+};
\ No newline at end of file
diff --git a/lib/webpagetest.js b/lib/webpagetest.js
index c593336..92f3427 100644
--- a/lib/webpagetest.js
+++ b/lib/webpagetest.js
@@ -15,6 +15,8 @@ var http = require("http"),
   server = require("./server"),
   mapping = require("./mapping");
 
+const { DEFAULT_POLL_VALUE, POLL_LOWER_LIMIT} = require("./consts");
+
 var reSpace = /\s/,
   reConnectivity =
     /^(?:Cable|DSL|3GSlow|3G|3GFast|4G|LTE|Edge|2G|Dial|FIOS|Native|custom)$/,
@@ -474,7 +476,7 @@ function runTest(what, options, callback) {
 
   // poll results
   if (options.pollResults && !options.dryRun) {
-    options.pollResults = parseInt(options.pollResults * 1000, 10) || 5000;
+    options.pollResults = Math.max(POLL_LOWER_LIMIT, options.pollResults || DEFAULT_POLL_VALUE) * 1000;
 
     return api.call(
       this,
@@ -537,7 +539,7 @@ function runTest(what, options, callback) {
 function runTestAndWait(what, options, callback) {
   delete options.pollResults;
 
-  options = Object.assign(options, { pollResults: 13 });
+  options = Object.assign(options, { pollResults: DEFAULT_POLL_VALUE });
 
   new Promise((resolve) => {
     let test = runTest.bind(this, what, options, callback);
diff --git a/package.json b/package.json
index 68daa4b..40a360c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "webpagetest",
-  "version": "0.7.5",
+  "version": "0.7.6",
   "description": "WebPageTest API wrapper for NodeJS",
   "author": "WebPageTest <github@WebPageTest.com> (http://github.com/WebPageTest)",
   "homepage": "http://github.com/WebPageTest/webpagetest-api",