diff --git a/router/java/test/junit/net/i2p/router/tunnel/FragmentTest.java b/router/java/test/junit/net/i2p/router/tunnel/FragmentTest.java
index 2c0f5e1b4..ac6b96107 100644
--- a/router/java/test/junit/net/i2p/router/tunnel/FragmentTest.java
+++ b/router/java/test/junit/net/i2p/router/tunnel/FragmentTest.java
@@ -66,8 +66,8 @@ public class FragmentTest {
 
         try {
             pre.preprocessQueue(messages, new SenderImpl(), receiver);
-            fail("should have thrown IAE");
-        } catch (IllegalArgumentException expected){}
+            fail("should have thrown UOE");
+        } catch (UnsupportedOperationException expected){}
     }
     
     /**
@@ -89,8 +89,8 @@ public class FragmentTest {
             
         try {
             pre.preprocessQueue(messages, new SenderImpl(), receiver);
-            fail("should have thrown IAE");
-        } catch (IllegalArgumentException expected){}
+            fail("should have thrown UOE");
+        } catch (UnsupportedOperationException expected){}
     }
     
     /**