diff --git a/java/java-tests/testSrc/com/intellij/openapi/vfs/JarFileSystemTest.java b/java/java-tests/testSrc/com/intellij/openapi/vfs/JarFileSystemTest.java
index 053eb932d3eb..d1154eff0bfa 100644
--- a/java/java-tests/testSrc/com/intellij/openapi/vfs/JarFileSystemTest.java
+++ b/java/java-tests/testSrc/com/intellij/openapi/vfs/JarFileSystemTest.java
@@ -68,6 +68,7 @@ public class JarFileSystemTest extends IdeaTestCase {
 
   public void testJarRefresh() throws IOException {
     File jar = IoTestUtil.createTestJar();
+    assertTrue(jar.setLastModified(jar.lastModified() - 1000));
     VirtualFile vFile = LocalFileSystem.getInstance().refreshAndFindFileByIoFile(jar);
     assertNotNull(vFile);