diff --git a/src/etc/testcases/taskdefs/checksum.xml b/src/etc/testcases/taskdefs/checksum.xml
index fb6c6fb6a..706adc714 100644
--- a/src/etc/testcases/taskdefs/checksum.xml
+++ b/src/etc/testcases/taskdefs/checksum.xml
@@ -3,6 +3,7 @@
 
   <target name="cleanup">
     <delete file="../asf-logo.gif.MD5" />
+    <delete file="../asf-logo.gif.md5" />
     <delete>
       <fileset dir="checksum">
         <include name="**/*.MD5"/>
@@ -20,8 +21,8 @@
   </target>
 
   <target name="verifyAsTask">
-    <copy file="expected/asf-logo.gif.MD5" todir=".." />
-    <checksum file="../asf-logo.gif" fileext=".MD5"
+    <copy file="expected/asf-logo.gif.md5" todir=".." />
+    <checksum file="../asf-logo.gif" fileext=".md5"
               verifyproperty="logo.MD5" />
 
     <copy file="checksum.xml" tofile="../asf-logo.gif.MD5"
@@ -31,9 +32,9 @@
   </target>
 
   <target name="verifyAsCondition">
-    <copy file="expected/asf-logo.gif.MD5" todir=".." />
+    <copy file="expected/asf-logo.gif.md5" todir=".." />
     <condition property="logo.MD5">
-      <checksum file="../asf-logo.gif" fileext=".MD5" />
+      <checksum file="../asf-logo.gif" fileext=".md5" />
     </condition>
 
     <copy file="checksum.xml" tofile="../asf-logo.gif.MD5"
diff --git a/src/testcases/org/apache/tools/ant/taskdefs/ChecksumTest.java b/src/testcases/org/apache/tools/ant/taskdefs/ChecksumTest.java
index 1fdeef9d4..e618679ef 100644
--- a/src/testcases/org/apache/tools/ant/taskdefs/ChecksumTest.java
+++ b/src/testcases/org/apache/tools/ant/taskdefs/ChecksumTest.java
@@ -82,7 +82,7 @@ public class ChecksumTest extends BuildFileTest {
     public void testCreateMd5() throws IOException {
         FileUtils fileUtils = FileUtils.newFileUtils();
         executeTarget("createMd5");
-        assertTrue(fileUtils.contentEquals(project.resolveFile("expected/asf-logo.gif.MD5"),
+        assertTrue(fileUtils.contentEquals(project.resolveFile("expected/asf-logo.gif.md5"),
                                            project.resolveFile("../asf-logo.gif.MD5")));
     }