diff --git a/tests/Composer/Test/ApplicationTest.php b/tests/Composer/Test/ApplicationTest.php
index 8739a5004..48615af9c 100644
--- a/tests/Composer/Test/ApplicationTest.php
+++ b/tests/Composer/Test/ApplicationTest.php
@@ -25,7 +25,13 @@ class ApplicationTest extends TestCase
         $inputMock = $this->getMockBuilder('Symfony\Component\Console\Input\InputInterface')->getMock();
         $outputMock = $this->getMockBuilder('Symfony\Component\Console\Output\OutputInterface')->getMock();
 
+        putenv('COMPOSER_NO_INTERACTION=1');
+
         $index = 0;
+        $inputMock->expects($this->at($index++))
+            ->method('setInteractive')
+            ->with($this->equalTo(false));
+
         $inputMock->expects($this->at($index++))
             ->method('hasParameterOption')
             ->with($this->equalTo('--no-plugins'))
@@ -83,7 +89,13 @@ class ApplicationTest extends TestCase
         $inputMock = $this->getMockBuilder('Symfony\Component\Console\Input\InputInterface')->getMock();
         $outputMock = $this->getMockBuilder('Symfony\Component\Console\Output\OutputInterface')->getMock();
 
+        putenv('COMPOSER_NO_INTERACTION=1');
+
         $index = 0;
+        $inputMock->expects($this->at($index++))
+            ->method('setInteractive')
+            ->with($this->equalTo(false));
+
         $inputMock->expects($this->at($index++))
             ->method('hasParameterOption')
             ->with($this->equalTo('--no-plugins'))