diff --git a/.travis.yml b/.travis.yml
index bc9f8dfc2e3..67273567000 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,6 +8,8 @@ cache:
   directories:
   - $HOME/.m2
   - $HOME/.ivy2
+  - $HOME/.gradle/caches/
+  - $HOME/.gradle/wrapper/
   - $HOME/samples/client/petstore/php/SwaggerClient-php/vendor
   - $HOME/samples/client/petstore/ruby/venodr/bundle
   - $HOME/samples/client/petstore/python/.venv/
@@ -48,6 +50,8 @@ before_install:
 
   # show host table to confirm petstore.swagger.io is mapped to localhost
   - cat /etc/hosts
+  # show java version
+  - java -version
 
 install:
   # Add Godeps dependencies to GOPATH and PATH
diff --git a/samples/client/petstore-security-test/typescript-angular2/model/ModelReturn.ts b/samples/client/petstore-security-test/typescript-angular2/model/ModelReturn.ts
deleted file mode 100644
index 5e9e114be05..00000000000
--- a/samples/client/petstore-security-test/typescript-angular2/model/ModelReturn.ts
+++ /dev/null
@@ -1,24 +0,0 @@
-/**
- * Swagger Petstore *_/ ' \" =end -- \\r\\n \\n \\r
- * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\  *_/ ' \" =end --       
- *
- * OpenAPI spec version: 1.0.0 *_/ ' \" =end -- \\r\\n \\n \\r
- * Contact: apiteam@swagger.io *_/ ' \" =end -- \\r\\n \\n \\r
- *
- * NOTE: This class is auto generated by the swagger code generator program.
- * https://github.com/swagger-api/swagger-codegen.git
- * Do not edit the class manually.
- */
-
-import * as models from './models';
-
-/**
- * Model for testing reserved words  *_/ ' \" =end -- \\r\\n \\n \\r
- */
-export interface ModelReturn {
-    /**
-     * property description  *_/ ' \" =end -- \\r\\n \\n \\r
-     */
-    return?: number;
-
-}