diff --git a/_infrastructure/tests/runner.js b/_infrastructure/tests/runner.js
index dd429bd208..ba42dd21e3 100644
--- a/_infrastructure/tests/runner.js
+++ b/_infrastructure/tests/runner.js
@@ -59,7 +59,7 @@ var NodeExec = (function () {
         result.exitCode = null;
         var cmdLine = filename + ' ' + cmdLineArgs.join(' ');
 
-        var process = nodeExec(cmdLine, function (error, stdout, stderr) {
+        var process = nodeExec(cmdLine, { maxBuffer: 1 * 1024 * 1024 }, function (error, stdout, stderr) {
             result.stdout = stdout;
             result.stderr = stderr;
             result.exitCode = error ? error.code : 0;
diff --git a/_infrastructure/tests/src/exec.ts b/_infrastructure/tests/src/exec.ts
index f277d39425..5123d4cfc6 100644
--- a/_infrastructure/tests/src/exec.ts
+++ b/_infrastructure/tests/src/exec.ts
@@ -57,8 +57,8 @@ class NodeExec implements IExec {
         var result = new ExecResult();
         result.exitCode = null;
         var cmdLine = filename + ' ' + cmdLineArgs.join(' ');
-        
-        var process = nodeExec(cmdLine, function (error, stdout, stderr) {
+
+        var process = nodeExec(cmdLine, {maxBuffer: 1 * 1024 * 1024}, function (error, stdout, stderr) {
             result.stdout = stdout;
             result.stderr = stderr;
             result.exitCode = error ? error.code : 0;