Index: contrib/snowball/build.xml
===================================================================
--- contrib/snowball/build.xml	(revision 900154)
+++ contrib/snowball/build.xml	(working copy)
@@ -147,10 +147,9 @@
     description="Downloads Snowball vocabulary tests">
     <sequential>
       <mkdir dir="${vocab.dir}"/>
-      <exec dir="${vocab.dir}" executable="${svn.exe}"
-	            failifexecutionfails="false">
+      <exec dir="${vocab.dir}" executable="${svn.exe}" failifexecutionfails="false" failonerror="true">
         <arg line="checkout -r ${snowball.vocab.rev} ${snowball.vocab.url}"/>
-	  </exec>
-	</sequential>
+      </exec>
+    </sequential>
   </target>
 </project>
Index: contrib/snowball/src/test/org/apache/lucene/analysis/snowball/TestSnowballVocab.java
===================================================================
--- contrib/snowball/src/test/org/apache/lucene/analysis/snowball/TestSnowballVocab.java	(revision 900154)
+++ contrib/snowball/src/test/org/apache/lucene/analysis/snowball/TestSnowballVocab.java	(working copy)
@@ -43,6 +43,10 @@
    * Run all languages against their snowball vocabulary tests.
    */
   public void testStemmers() throws IOException {
+    if (!dataRoot.exists()) {
+      System.err.println("WARN: This test was disabled, as the svn checkout of snowball test files is not supported on your system!");
+      return;
+    }
     assertCorrectOutput("Danish", "danish");
     assertCorrectOutput("Dutch", "dutch");
     assertCorrectOutput("English", "english");