diff --git a/src/scratchpad/testcases/org/apache/poi/hslf/model/TestSlides.java b/src/scratchpad/testcases/org/apache/poi/hslf/model/TestSlides.java
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index 000000000..a60c87353
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+++ b/src/scratchpad/testcases/org/apache/poi/hslf/model/TestSlides.java
@@ -0,0 +1,123 @@
+/* ====================================================================
+   Copyright 2002-2004   Apache Software Foundation
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+==================================================================== */
+
+package org.apache.poi.hslf.model;
+
+import junit.framework.TestCase;
+import org.apache.poi.hslf.HSLFSlideShow;
+import org.apache.poi.hslf.usermodel.SlideShow;
+
+import java.io.ByteArrayOutputStream;
+import java.io.ByteArrayInputStream;
+
+/**
+ * Test adding new slides to a ppt.
+ * 
+ * Note - uses the same empty PPT file as the core "new Slideshow" 
+ *  stuff does
+ * @author Yegor Kozlov
+ */
+public class TestSlides extends TestCase {
+
+    /**
+     * Add 1 slide to an empty ppt.
+     * @throws Exception
+     */
+    public void testAddSlides1() throws Exception {
+        SlideShow ppt = new SlideShow(new HSLFSlideShow( TestSlides.class.getResourceAsStream("/org/apache/poi/hslf/data/empty.ppt") ));
+        assertTrue(ppt.getSlides().length == 0);
+        ppt.createSlide();
+        assertTrue(ppt.getSlides().length == 1);
+
+        //serialize and read again
+        ByteArrayOutputStream out = new ByteArrayOutputStream();
+        ppt.write(out);
+        out.close();
+
+        ppt = new SlideShow(new HSLFSlideShow(new ByteArrayInputStream(out.toByteArray())));
+        assertTrue(ppt.getSlides().length == 1);
+    }
+
+    /**
+     * Add 2 slides to an empty ppt
+     * @throws Exception
+     */
+    public void testAddSlides2() throws Exception {
+        SlideShow ppt = new SlideShow(new HSLFSlideShow( TestSlides.class.getResourceAsStream("/org/apache/poi/hslf/data/empty.ppt") ));
+        assertTrue(ppt.getSlides().length == 0);
+        
+        Slide s1 = ppt.createSlide();
+        assertTrue(ppt.getSlides().length == 1);
+        
+        Slide s2 = ppt.createSlide();
+        assertTrue(ppt.getSlides().length == 2);
+
+        //serialize and read again
+         ByteArrayOutputStream out = new ByteArrayOutputStream();
+        ppt.write(out);
+        out.close();
+
+        ppt = new SlideShow(new HSLFSlideShow(new ByteArrayInputStream(out.toByteArray())));
+        assertTrue(ppt.getSlides().length == 2);
+    }
+
+    /**
+     * Add 3 slides to an empty ppt
+     * @throws Exception
+     */
+    public void testAddSlides3() throws Exception {
+        SlideShow ppt = new SlideShow(new HSLFSlideShow( TestSlides.class.getResourceAsStream("/org/apache/poi/hslf/data/empty.ppt") ));
+        assertTrue(ppt.getSlides().length == 0);
+        
+        Slide s1 = ppt.createSlide();
+        assertTrue(ppt.getSlides().length == 1);
+        
+        Slide s2 = ppt.createSlide();
+        assertTrue(ppt.getSlides().length == 2);
+
+        Slide s3 = ppt.createSlide();
+        assertTrue(ppt.getSlides().length == 3);
+
+        //serialize and read again
+         ByteArrayOutputStream out = new ByteArrayOutputStream();
+        ppt.write(out);
+        out.close();
+
+        ppt = new SlideShow(new HSLFSlideShow(new ByteArrayInputStream(out.toByteArray())));
+        assertTrue(ppt.getSlides().length == 3);
+    }
+
+    /**
+     * Add slides to ppt which already has two slides
+     */
+    public void testAddSlides2to3() throws Exception {
+		String dirname = System.getProperty("HSLF.testdata.path");
+        SlideShow ppt = new SlideShow(new HSLFSlideShow(dirname + "/basic_test_ppt_file.ppt"));
+        
+        assertTrue(ppt.getSlides().length == 2);
+        ppt.createSlide();
+        assertTrue(ppt.getSlides().length == 3);
+
+        //serialize and read again
+         ByteArrayOutputStream out = new ByteArrayOutputStream();
+        ppt.write(out);
+        out.close();
+
+        ppt = new SlideShow(new HSLFSlideShow(new ByteArrayInputStream(out.toByteArray())));
+        assertTrue(ppt.getSlides().length == 3);
+    }
+
+}