try to fix basic app travis test.

.travis.yml

@@ -4,11 +4,8 @@ php:
  - 5.5
  - 5.4
 
-install:
-  - composer require --prefer-dist --dev 'codeception/codeception \*' 'codeception/specify \*'
-
 before_script:
   - php vendor/bin/codecept build
 
 script:
-  - php vendor/bin/codecept run
+  - php vendor/bin/codecept run functional

composer.json

@@ -22,7 +22,9 @@
 	"require-dev": {
 		"yiisoft/yii2-codeception": "*",
 		"yiisoft/yii2-debug": "*",
-		"yiisoft/yii2-gii": "*"
+		"yiisoft/yii2-gii": "*",
+		"codeception/codeception": "*",
+		"codeception/specify": "*"
 	},
 	"scripts": {
 		"post-create-project-cmd": [