diff --git a/build/tasks/node_smoke_tests.js b/build/tasks/node_smoke_tests.js
index 157aa80af..bd0a9150e 100644
--- a/build/tasks/node_smoke_tests.js
+++ b/build/tasks/node_smoke_tests.js
@@ -22,7 +22,7 @@ module.exports = function( grunt ) {
 			var taskName = "node_" + testFilePath.replace( /\.js$/, "" );
 
 			grunt.registerTask( taskName, function() {
-				spawnTest( this.async(), "node test/node_smoke_tests/" + testFilePath );
+				spawnTest( this.async(), "node \"test/node_smoke_tests/" + testFilePath + "\"" );
 			} );
 
 			nodeSmokeTests.push( taskName );
diff --git a/build/tasks/promises_aplus_tests.js b/build/tasks/promises_aplus_tests.js
index 5bd20ecdc..7f8153448 100644
--- a/build/tasks/promises_aplus_tests.js
+++ b/build/tasks/promises_aplus_tests.js
@@ -10,7 +10,7 @@ module.exports = function( grunt ) {
 
 	grunt.registerTask( "promises_aplus_tests:deferred", function() {
 		spawnTest( this.async(),
-			__dirname + "/../../node_modules/.bin/promises-aplus-tests" +
+			"\"" + __dirname + "/../../node_modules/.bin/promises-aplus-tests\"" +
 				" test/promises_aplus_adapters/deferred.js" +
 				" --timeout " + timeout
 		);
@@ -18,7 +18,7 @@ module.exports = function( grunt ) {
 
 	grunt.registerTask( "promises_aplus_tests:when", function() {
 		spawnTest( this.async(),
-			__dirname + "/../../node_modules/.bin/promises-aplus-tests" +
+			"\"" + __dirname + "/../../node_modules/.bin/promises-aplus-tests\"" +
 				" test/promises_aplus_adapters/when.js" +
 				" --timeout " + timeout
 		);