diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/file/ObjectDirectoryTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/file/ObjectDirectoryTest.java
index 923f28389..e9b3d2bc7 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/file/ObjectDirectoryTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/file/ObjectDirectoryTest.java
@@ -42,6 +42,10 @@
 
 package org.eclipse.jgit.internal.storage.file;
 
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.concurrent.Callable;
@@ -49,14 +53,29 @@ import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.Future;
 
-import org.eclipse.jgit.internal.storage.file.ObjectDirectory;
 import org.eclipse.jgit.junit.RepositoryTestCase;
+import org.eclipse.jgit.junit.TestRepository;
+import org.eclipse.jgit.lib.ConfigConstants;
 import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.lib.ObjectId;
+import org.eclipse.jgit.storage.file.FileBasedConfig;
 import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.junit.runners.Parameterized.Parameter;
+import org.junit.runners.Parameterized.Parameters;
 
+@RunWith(Parameterized.class)
 public class ObjectDirectoryTest extends RepositoryTestCase {
 
+	@Parameter
+	public Boolean trustFolderStats;
+
+	@Parameters(name= "core.trustfolderstat={0}")
+	public static Iterable<? extends Object> data() {
+		return Arrays.asList(Boolean.TRUE, Boolean.FALSE);
+	}
+
 	@Test
 	public void testConcurrentInsertionOfBlobsToTheSameNewFanOutDirectory()
 			throws Exception {
@@ -69,6 +88,34 @@ public class ObjectDirectoryTest extends RepositoryTestCase {
 		}
 	}
 
+	@Test
+	public void testShouldNotSearchPacksAgainTheSecondTime() throws Exception {
+		FileRepository bareRepository = newTestRepositoryWithOnePackfile();
+		ObjectDirectory dir = bareRepository.getObjectDatabase();
+
+		// Make sure that timestamps are modified and read so that a full
+		// file snapshot check is performed
+		Thread.sleep(3000L);
+
+		assertTrue(dir.searchPacksAgain(dir.packList.get()));
+		assertFalse(dir.searchPacksAgain(dir.packList.get()));
+	}
+
+	private FileRepository newTestRepositoryWithOnePackfile() throws Exception {
+		FileRepository repository = createBareRepository();
+		TestRepository<FileRepository> testRepository = new TestRepository<FileRepository>(repository);
+		testRepository.commit();
+		testRepository.packAndPrune();
+
+		FileBasedConfig repoConfig = repository.getConfig();
+		repoConfig.setBoolean(ConfigConstants.CONFIG_CORE_SECTION,null,
+				ConfigConstants.CONFIG_KEY_TRUSTFOLDERSTAT,
+				trustFolderStats.booleanValue());
+		repoConfig.save();
+
+		return repository;
+	}
+
 	private Collection<Callable<ObjectId>> blobInsertersForTheSameFanOutDir(
 			final ObjectDirectory dir) {
 		Callable<ObjectId> callable = new Callable<ObjectId>() {
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/ObjectDirectory.java b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/ObjectDirectory.java
index 44ad99bb9..7c7a39ecc 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/ObjectDirectory.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/ObjectDirectory.java
@@ -127,8 +127,6 @@ public class ObjectDirectory extends FileObjectDatabase {
 
 	private final File alternatesFile;
 
-	private final AtomicReference<PackList> packList;
-
 	private final FS fs;
 
 	private final AtomicReference<AlternateHandle[]> alternates;
@@ -141,6 +139,8 @@ public class ObjectDirectory extends FileObjectDatabase {
 
 	private Set<ObjectId> shallowCommitsIds;
 
+	final AtomicReference<PackList> packList;
+
 	/**
 	 * Initialize a reference to an on-disk object directory.
 	 *
@@ -674,7 +674,7 @@ public class ObjectDirectory extends FileObjectDatabase {
 		return InsertLooseObjectResult.FAILURE;
 	}
 
-	private boolean searchPacksAgain(PackList old) {
+	boolean searchPacksAgain(PackList old) {
 		// Whether to trust the pack folder's modification time. If set
 		// to false we will always scan the .git/objects/pack folder to
 		// check for new pack files. If set to true (default) we use the
@@ -822,7 +822,8 @@ public class ObjectDirectory extends FileObjectDatabase {
 			final String packName = base + PACK.getExtension();
 			final File packFile = new File(packDirectory, packName);
 			final PackFile oldPack = forReuse.remove(packName);
-			if (oldPack != null && oldPack.getFileSnapshot().isModified(packFile)) {
+			if (oldPack != null
+					&& !oldPack.getFileSnapshot().isModified(packFile)) {
 				list.add(oldPack);
 				continue;
 			}
@@ -960,7 +961,7 @@ public class ObjectDirectory extends FileObjectDatabase {
 		return new File(new File(getDirectory(), d), f);
 	}
 
-	private static final class PackList {
+	static final class PackList {
 		/** State just before reading the pack directory. */
 		final FileSnapshot snapshot;