diff --git a/tests/src/java/com/threerings/io/StreamableTest.java b/tests/src/java/com/threerings/io/StreamableTest.java
index 33b06d55e..88048a083 100644
--- a/tests/src/java/com/threerings/io/StreamableTest.java
+++ b/tests/src/java/com/threerings/io/StreamableTest.java
@@ -1,5 +1,5 @@
 //
-// $Id: StreamableTest.java,v 1.2 2004/08/27 02:20:57 mdb Exp $
+// $Id$
 //
 // Narya library - tools for developing networked games
 // Copyright (C) 2002-2004 Three Rings Design, Inc., All Rights Reserved
@@ -87,7 +87,7 @@ public class StreamableTest extends TestCase
             _fizzle = in.readInt();
         }
 
-        protected void toString (StringBuffer buf)
+        protected void toString (StringBuilder buf)
         {
             super.toString(buf);
             buf.append(", fizzle=").append(_fizzle);
diff --git a/tests/src/java/com/threerings/parlor/TestConfig.java b/tests/src/java/com/threerings/parlor/TestConfig.java
index 741e01726..384306b4c 100644
--- a/tests/src/java/com/threerings/parlor/TestConfig.java
+++ b/tests/src/java/com/threerings/parlor/TestConfig.java
@@ -49,7 +49,7 @@ public class TestConfig extends GameConfig
         return "com.threerings.parlor.test.TestManager";
     }
 
-    protected void toString (StringBuffer buf)
+    protected void toString (StringBuilder buf)
     {
         super.toString(buf);
         buf.append(", foozle=").append(foozle);