diff --git a/.gitignore b/.gitignore
index b785247..7bdfc1b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 node_modules
 npm-debug.log
 tmp
+.idea
\ No newline at end of file
diff --git a/README.md b/README.md
index cec1a5b..8a87687 100644
--- a/README.md
+++ b/README.md
@@ -94,6 +94,12 @@ Default value: `event.json`
 
 Name of the .json file containing your test event relative to your Gruntfile.
 
+##### options.env_variables
+Type: `Object`
+Default value: `null`
+
+A object that will be added as environment variables (process.env) when running task.
+
 #### Usage Examples
 
 ##### Default Options
diff --git a/utils/invoke_task.js b/utils/invoke_task.js
index a9db0b9..d8ae187 100644
--- a/utils/invoke_task.js
+++ b/utils/invoke_task.js
@@ -27,7 +27,8 @@ invokeTask.getHandler = function (grunt) {
             'file_name': 'index.js',
             'event': 'event.json',
             'client_context': 'client_context.json',
-            'identity': 'identity.json'
+            'identity': 'identity.json',
+            'env_variables': null
         });
 
         grunt.log.writeln("");
@@ -36,6 +37,14 @@ invokeTask.getHandler = function (grunt) {
 
         var clientContext = null;
 
+        if(options.env_variables) {
+            for(var variable in options.env_variables) {
+                if(options.env_variables.hasOwnProperty(variable)) {
+                    process.env[variable] = options.env_variables[variable];
+                }
+            }
+        }
+
         //since clientContext should be optional, skip if doesn't exist
         try {
             clientContext = JSON.parse(fs.readFileSync(path.resolve(options.client_context), "utf8"));