diff --git a/src/java/com/samskivert/depot/tests/ByteEnumTest.java b/src/java/com/samskivert/depot/tests/ByteEnumTest.java
new file mode 100644
index 0000000..dc1199d
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+++ b/src/java/com/samskivert/depot/tests/ByteEnumTest.java
@@ -0,0 +1,78 @@
+//
+// $Id$
+//
+// Depot library - a Java relational persistence library
+// Copyright (C) 2006-2010 Michael Bayne and Pär Winzell
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.samskivert.depot.tests;
+
+import java.lang.reflect.Field;
+
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+import com.samskivert.util.ByteEnum;
+
+import com.samskivert.depot.PersistentRecord;
+import com.samskivert.depot.impl.FieldMarshaller;
+
+/**
+ * Tests ByteEnum related bits.
+ */
+public class ByteEnumTest
+{
+    public enum TestEnum implements ByteEnum {
+        ONE(1), TWO(2), THREE(3);
+
+        // from interface ByteEnum
+        public byte toByte () {
+            return _code;
+        }
+
+        TestEnum (int code) {
+            _code = (byte)code;
+        }
+        protected byte _code;
+    }
+
+    public class NotAnEnum implements ByteEnum {
+        public byte toByte () {
+            return 0;
+        }
+    }
+
+    public static class TestRecord extends PersistentRecord
+    {
+        public TestEnum good;
+        public NotAnEnum bad;
+    }
+
+    @Test public void testMarshaller ()
+        throws NoSuchFieldException
+    {
+        Field good = TestRecord.class.getField("good");
+        Field bad = TestRecord.class.getField("bad");
+        assertTrue(FieldMarshaller.createMarshaller(good) != null);
+
+        try {
+            FieldMarshaller.createMarshaller(bad);
+            fail();
+        } catch (IllegalArgumentException iae) {
+            // expected
+        }
+    }
+}