diff --git a/src/main/java/sk/gymy/seminar/swingui/SeminarPanel.java b/src/main/java/sk/gymy/seminar/swingui/SeminarPanel.java
index fde051f..93e7931 100644
--- a/src/main/java/sk/gymy/seminar/swingui/SeminarPanel.java
+++ b/src/main/java/sk/gymy/seminar/swingui/SeminarPanel.java
@@ -41,7 +41,7 @@ public SeminarPanel() {
     }
 
     private Groups getGroups() {
-        return (Groups) solutionBusiness.getSolution();
+        return (Groups) getSolutionBusiness().getSolution();
     }
 
     public void resetPanel(Solution solution) {
diff --git a/src/test/java/sk/gymy/seminar/swingui/SeminarPanelTest.java b/src/test/java/sk/gymy/seminar/swingui/SeminarPanelTest.java
index f40542d..e6493f8 100644
--- a/src/test/java/sk/gymy/seminar/swingui/SeminarPanelTest.java
+++ b/src/test/java/sk/gymy/seminar/swingui/SeminarPanelTest.java
@@ -101,6 +101,8 @@ public void testLockIconDrawing() {
             }
         }
         assertEquals(2, buttonsWithLockIcons); // Two locked seminars
+        solvedGroups.getSeminarList().get(0).setLocked(false);
+        solvedGroups.getSeminarList().get(2).setLocked(false);
     }
 
 }