diff --git a/src/main/java/de/thm/arsnova/controller/FeedbackController.java b/src/main/java/de/thm/arsnova/controller/FeedbackController.java
index 9b60626c4a7d3544fd2fa23427f95cdf3f483bc3..b91cec4859999a684c3411ef6d106c1238de47b1 100644
--- a/src/main/java/de/thm/arsnova/controller/FeedbackController.java
+++ b/src/main/java/de/thm/arsnova/controller/FeedbackController.java
@@ -65,7 +65,7 @@ public class FeedbackController extends AbstractController {
 	
 	@RequestMapping(value="/session/{sessionkey}/averagefeedback", method=RequestMethod.GET)
 	@ResponseBody
-	public int getAverageFeedback(@PathVariable String sessionkey) {
+	public long getAverageFeedback(@PathVariable String sessionkey) {
 		return feedbackService.getAverageFeedback(sessionkey);
 	}
 	
diff --git a/src/test/java/de/thm/arsnova/dao/StubDatabaseDao.java b/src/test/java/de/thm/arsnova/dao/StubDatabaseDao.java
index 13fd216408fdf2dde05295ac414498bdde5ca485..16e5bf59eff12be3e0e1b2787b4163ff125ff1cc 100644
--- a/src/test/java/de/thm/arsnova/dao/StubDatabaseDao.java
+++ b/src/test/java/de/thm/arsnova/dao/StubDatabaseDao.java
@@ -21,9 +21,9 @@ import de.thm.arsnova.exceptions.NotFoundException;
 @Scope("singleton")
 public class StubDatabaseDao implements IDatabaseDao {
 
-	private Map<String, Session> stubSessions = new ConcurrentHashMap<String, Session>();
-	private Map<String, Feedback> stubFeedbacks = new ConcurrentHashMap<String, Feedback>();
-	private Map<Session, Question> stubQuestions = new ConcurrentHashMap<Session, Question>();
+	private static Map<String, Session> stubSessions = new ConcurrentHashMap<String, Session>();
+	private static Map<String, Feedback> stubFeedbacks = new ConcurrentHashMap<String, Feedback>();
+	private static Map<Session, Question> stubQuestions = new ConcurrentHashMap<Session, Question>();
 	
 	private final Logger logger = LoggerFactory.getLogger(getClass());
 	
@@ -40,7 +40,7 @@ public class StubDatabaseDao implements IDatabaseDao {
 		session.setName("TestSession1");
 		session.setShortName("TS1");
 		
-		this.stubSessions.put("12345678", session);
+		stubSessions.put("12345678", session);
 		
 		session.setActive(true);
 		session.setCreator("ptsr00");
@@ -48,7 +48,7 @@ public class StubDatabaseDao implements IDatabaseDao {
 		session.setName("TestSession2");
 		session.setShortName("TS2");
 		
-		this.stubSessions.put("87654321", session);
+		stubSessions.put("87654321", session);
 	}
 	
 	private void fillWithDummyFeedbacks() {
diff --git a/src/test/java/de/thm/arsnova/services/SessionServiceTest.java b/src/test/java/de/thm/arsnova/services/SessionServiceTest.java
index be16be5fe817d8f2d4f0ca916d44b81f993ae97d..3ad94fdc68830216c34d8f03ccff2a78a475e251 100644
--- a/src/test/java/de/thm/arsnova/services/SessionServiceTest.java
+++ b/src/test/java/de/thm/arsnova/services/SessionServiceTest.java
@@ -19,6 +19,9 @@
 package de.thm.arsnova.services;
 
 import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertEquals;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -26,6 +29,10 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 
+import de.thm.arsnova.entities.Session;
+import de.thm.arsnova.exceptions.NotFoundException;
+import de.thm.arsnova.exceptions.UnauthorizedException;
+
 @RunWith(SpringJUnit4ClassRunner.class)
 @ContextConfiguration(locations={
 		"file:src/main/webapp/WEB-INF/arsnova-servlet.xml",
@@ -45,4 +52,47 @@ public class SessionServiceTest {
 		System.out.println(sessionService.generateKeyword());
 		assertTrue(sessionService.generateKeyword().matches("^[0-9]{8}$"));
 	}
+	
+	@Test(expected=NotFoundException.class)
+	public void testShouldFindNonExistantSession() {
+		userService.setUserAuthenticated(true);
+		sessionService.joinSession("00000000");
+	}
+	
+	@Test(expected=UnauthorizedException.class)
+	public void testShouldNotReturnSessionIfUnauthorized() {
+		userService.setUserAuthenticated(false);
+		sessionService.joinSession("12345678");
+	}
+	
+	@Test(expected=UnauthorizedException.class)
+	public void testShouldNotSaveSessionIfUnauthorized() {
+		userService.setUserAuthenticated(false);
+		
+		Session session = new Session();
+		session.setActive(true);
+		session.setCreator("ptsr00");
+		session.setKeyword("11111111");
+		session.setName("TestSessionX");
+		session.setShortName("TSX");
+		sessionService.saveSession(session);
+		
+		userService.setUserAuthenticated(true);
+		
+		assertNull(sessionService.joinSession("11111111"));
+	}
+	
+	@Test
+	public void testShouldSaveSession() {
+		userService.setUserAuthenticated(true);
+		
+		Session session = new Session();
+		session.setActive(true);
+		session.setCreator("ptsr00");
+		session.setKeyword("11111111");
+		session.setName("TestSessionX");
+		session.setShortName("TSX");
+		sessionService.saveSession(session);
+		assertNotNull(sessionService.joinSession("11111111"));
+	}
 }
\ No newline at end of file