diff --git a/plugins/TestingList.java b/plugins/TestingList.java
index b0e0ed0..297d382 100644
--- a/plugins/TestingList.java
+++ b/plugins/TestingList.java
@@ -455,7 +455,7 @@ public class TestingList extends Panel {
                     iconSource = "/icons/button_stop-16px.png";
                 } else {
                     sStatus = "Disabled";
-                    iconSource = null;
+                    iconSource = "";
                 }
                 ImageIcon icon = new ImageIcon(getClass().getResource(iconSource));
                 jTable1.setValueAt(bSelected, row, COL_CHECK);