diff --git a/org.eclipse.jdt.compiler.tool.tests/src/org/eclipse/jdt/compiler/tool/tests/AbstractCompilerToolTest.java b/org.eclipse.jdt.compiler.tool.tests/src/org/eclipse/jdt/compiler/tool/tests/AbstractCompilerToolTest.java
index cb26233..70763b5 100644
--- a/org.eclipse.jdt.compiler.tool.tests/src/org/eclipse/jdt/compiler/tool/tests/AbstractCompilerToolTest.java
+++ b/org.eclipse.jdt.compiler.tool.tests/src/org/eclipse/jdt/compiler/tool/tests/AbstractCompilerToolTest.java
@@ -113,7 +113,9 @@
 			return task.call();
 		} finally {
 			try {
-				manager.close();
+				if (arguments.standardJavaFileManager == null) { // close only if it is got in this function
+					manager.close();
+				}
 			} catch (IOException e) {
 				// nop
 			}