diff --git a/Jakefile.js b/Jakefile.js
index 151f1ab5db4..85ae5f60361 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -726,16 +726,25 @@ function runConsoleTests(defaultReporter, runInParallel) {
         tests = tests ? ' -g "' + tests + '"' : '';
         var cmd = "mocha" + (debug ? " --debug-brk" : "") + " -R " + reporter + tests + colors + ' -t ' + testTimeout + ' ' + run;
         console.log(cmd);
+
+        var savedNodeEnv = process.env.NODE_ENV;
+        process.env.NODE_ENV = "development";
         exec(cmd, function () {
+            process.env.NODE_ENV = savedNodeEnv;
             runLinter();
             finish();
         }, function(e, status) {
+            process.env.NODE_ENV = savedNodeEnv;
             finish(status);
         });
 
     }
     else {
+        var savedNodeEnv = process.env.NODE_ENV;
+        process.env.NODE_ENV = "development";
         runTestsInParallel(taskConfigsFolder, run, { testTimeout: testTimeout, noColors: colors === " --no-colors " }, function (err) {
+            process.env.NODE_ENV = savedNodeEnv;
+
             // last worker clean everything and runs linter in case if there were no errors
             deleteTemporaryProjectOutput();
             jake.rmRf(taskConfigsFolder);
diff --git a/scripts/mocha-parallel.js b/scripts/mocha-parallel.js
index 159dd630cc2..cc695729cbd 100644
--- a/scripts/mocha-parallel.js
+++ b/scripts/mocha-parallel.js
@@ -34,13 +34,7 @@ function discoverTests(run, options, cb) {
     console.log("Discovering tests...");
 
     var cmd = "mocha -R " + require.resolve("./mocha-none-reporter.js") + " " + run;
-    var p = child_process.spawn(
-        process.platform === "win32" ? "cmd" : "/bin/sh",
-        process.platform === "win32" ? ["/c", cmd] : ["-c", cmd], {
-            windowsVerbatimArguments: true,
-            env: { NODE_ENV: "development" }
-        });
-
+    var p = spawnProcess(cmd);
     p.on("exit", function (status) {
         if (status) {
             cb(new Error("Process exited with code " + status));
@@ -87,18 +81,11 @@ function runTests(taskConfigsFolder, run, options, cb) {
 
         // Start the background process.
         var cmd = "mocha -t " + (options.testTimeout || 20000) + " -R tap --no-colors " + run + " --config='" + partition.file + "'";
-        var p = child_process.spawn(
-            process.platform === "win32" ? "cmd" : "/bin/sh",
-            process.platform === "win32" ? ["/c", cmd] : ["-c", cmd], {
-                windowsVerbatimArguments: true,
-                env: { NODE_ENV: "development" }
-            });
-
+        var p = spawnProcess(cmd);
         var rl = readline.createInterface({
             input: p.stdout,
             terminal: false
         });
-
         rl.on("line", onmessage);
         p.on("exit", onexit)
 
@@ -259,6 +246,12 @@ function runTests(taskConfigsFolder, run, options, cb) {
     }
 }
 
+function spawnProcess(cmd, options) {
+    var shell = process.platform === "win32" ? "cmd" : "/bin/sh";
+    var prefix = process.platform === "win32" ? "/c" : "-c";
+    return child_process.spawn(shell, [prefix, cmd], { windowsVerbatimArguments: true });
+}
+
 function ProgressBars(options) {
     if (!options) options = {};
     var open = options.open || '[';