diff --git a/src/testcases/org/apache/poi/util/TestIOUtils.java b/src/testcases/org/apache/poi/util/TestIOUtils.java
index b3ebeac4ff..0acef2fa7d 100644
--- a/src/testcases/org/apache/poi/util/TestIOUtils.java
+++ b/src/testcases/org/apache/poi/util/TestIOUtils.java
@@ -44,7 +44,7 @@ import org.junit.Test;
 public final class TestIOUtils {
 
     static File TMP;
-    static final long LENGTH = new Random().nextInt(10000);
+    static final long LENGTH = 300+new Random().nextInt(9000);
 
     @BeforeClass
     public static void setUp() throws IOException {