diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/lib/IndexDiffSubmoduleTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/lib/IndexDiffSubmoduleTest.java
index 3259f622f..0111b9411 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/lib/IndexDiffSubmoduleTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/lib/IndexDiffSubmoduleTest.java
@@ -90,7 +90,6 @@ public void setUp() throws Exception {
 				.setPath("modules/submodule")
 				.setURI(submoduleStandalone.getDirectory().toURI().toString())
 				.call();
-		submoduleStandalone.close();
 		submodule_trash = submodule_db.getWorkTree();
 		addRepoToClose(submodule_db);
 		writeTrashFile("fileInRoot", "root");