diff --git a/src/cryfs/filesystem/CryFile.cpp b/src/cryfs/filesystem/CryFile.cpp
index 84dc5404..16df5a36 100644
--- a/src/cryfs/filesystem/CryFile.cpp
+++ b/src/cryfs/filesystem/CryFile.cpp
@@ -34,7 +34,7 @@ unique_ref<parallelaccessfsblobstore::FileBlobRef> CryFile::LoadBlob() const {
   return std::move(*file_blob);
 }
 
-unique_ref<fspp::OpenFile> CryFile::open(int flags) const {
+unique_ref<fspp::OpenFile> CryFile::open(int flags) {
   // TODO Should we honor open flags?
   UNUSED(flags);
   device()->callFsActionCallbacks();
@@ -42,7 +42,7 @@ unique_ref<fspp::OpenFile> CryFile::open(int flags) const {
   return make_unique_ref<CryOpenFile>(device(), parent(), std::move(blob));
 }
 
-void CryFile::truncate(off_t size) const {
+void CryFile::truncate(off_t size) {
   device()->callFsActionCallbacks();
   auto blob = LoadBlob();
   blob->resize(size);
diff --git a/src/cryfs/filesystem/CryFile.h b/src/cryfs/filesystem/CryFile.h
index 95777ff9..270578ba 100644
--- a/src/cryfs/filesystem/CryFile.h
+++ b/src/cryfs/filesystem/CryFile.h
@@ -14,8 +14,8 @@ public:
   CryFile(CryDevice *device, cpputils::unique_ref<parallelaccessfsblobstore::DirBlobRef> parent, const blockstore::Key &key);
   ~CryFile();
 
-  cpputils::unique_ref<fspp::OpenFile> open(int flags) const override;
-  void truncate(off_t size) const override;
+  cpputils::unique_ref<fspp::OpenFile> open(int flags) override;
+  void truncate(off_t size) override;
   fspp::Dir::EntryType getType() const override;
   void remove() override;
 
diff --git a/src/cryfs/filesystem/CryNode.cpp b/src/cryfs/filesystem/CryNode.cpp
index 71e362b5..0d551bae 100644
--- a/src/cryfs/filesystem/CryNode.cpp
+++ b/src/cryfs/filesystem/CryNode.cpp
@@ -52,6 +52,11 @@ shared_ptr<const DirBlobRef> CryNode::parent() const {
   return *_parent;
 }
 
+shared_ptr<DirBlobRef> CryNode::parent() {
+  ASSERT(_parent != none, "We are the root directory and can't get the parent of the root directory");
+  return *_parent;
+}
+
 void CryNode::rename(const bf::path &to) {
   device()->callFsActionCallbacks();
   if (_parent == none) {
diff --git a/src/cryfs/filesystem/CryNode.h b/src/cryfs/filesystem/CryNode.h
index 2b00cb39..1399d41b 100644
--- a/src/cryfs/filesystem/CryNode.h
+++ b/src/cryfs/filesystem/CryNode.h
@@ -29,6 +29,7 @@ protected:
   const CryDevice *device() const;
   cpputils::unique_ref<parallelaccessfsblobstore::FsBlobRef> LoadBlob() const;
   std::shared_ptr<const parallelaccessfsblobstore::DirBlobRef> parent() const;
+  std::shared_ptr<parallelaccessfsblobstore::DirBlobRef> parent();
 
   virtual fspp::Dir::EntryType getType() const = 0;
 
diff --git a/src/cryfs/filesystem/CryOpenFile.cpp b/src/cryfs/filesystem/CryOpenFile.cpp
index e0be9f08..8a03b2a8 100644
--- a/src/cryfs/filesystem/CryOpenFile.cpp
+++ b/src/cryfs/filesystem/CryOpenFile.cpp
@@ -19,7 +19,7 @@ using fspp::fuse::FuseErrnoException;
 
 namespace cryfs {
 
-CryOpenFile::CryOpenFile(const CryDevice *device, shared_ptr<const DirBlobRef> parent, unique_ref<FileBlobRef> fileBlob)
+CryOpenFile::CryOpenFile(const CryDevice *device, shared_ptr<DirBlobRef> parent, unique_ref<FileBlobRef> fileBlob)
 : _device(device), _parent(parent), _fileBlob(std::move(fileBlob)) {
 }
 
@@ -41,15 +41,18 @@ void CryOpenFile::stat(struct ::stat *result) const {
 void CryOpenFile::truncate(off_t size) const {
   _device->callFsActionCallbacks();
   _fileBlob->resize(size);
+  _parent->updateModificationTimestampForChild(_fileBlob->key());
 }
 
 size_t CryOpenFile::read(void *buf, size_t count, off_t offset) const {
   _device->callFsActionCallbacks();
+  _parent->updateAccessTimestampForChild(_fileBlob->key());
   return _fileBlob->read(buf, offset, count);
 }
 
 void CryOpenFile::write(const void *buf, size_t count, off_t offset) {
   _device->callFsActionCallbacks();
+  _parent->updateModificationTimestampForChild(_fileBlob->key());
   _fileBlob->write(buf, offset, count);
 }
 
diff --git a/src/cryfs/filesystem/CryOpenFile.h b/src/cryfs/filesystem/CryOpenFile.h
index b621e3be..b483f584 100644
--- a/src/cryfs/filesystem/CryOpenFile.h
+++ b/src/cryfs/filesystem/CryOpenFile.h
@@ -11,7 +11,7 @@ class CryDevice;
 
 class CryOpenFile final: public fspp::OpenFile {
 public:
-  explicit CryOpenFile(const CryDevice *device, std::shared_ptr<const parallelaccessfsblobstore::DirBlobRef> parent, cpputils::unique_ref<parallelaccessfsblobstore::FileBlobRef> fileBlob);
+  explicit CryOpenFile(const CryDevice *device, std::shared_ptr<parallelaccessfsblobstore::DirBlobRef> parent, cpputils::unique_ref<parallelaccessfsblobstore::FileBlobRef> fileBlob);
   ~CryOpenFile();
 
   void stat(struct ::stat *result) const override;
@@ -24,7 +24,7 @@ public:
 
 private:
   const CryDevice *_device;
-  std::shared_ptr<const parallelaccessfsblobstore::DirBlobRef> _parent;
+  std::shared_ptr<parallelaccessfsblobstore::DirBlobRef> _parent;
   cpputils::unique_ref<parallelaccessfsblobstore::FileBlobRef> _fileBlob;
 
   DISALLOW_COPY_AND_ASSIGN(CryOpenFile);
diff --git a/src/cryfs/filesystem/cachingfsblobstore/DirBlobRef.h b/src/cryfs/filesystem/cachingfsblobstore/DirBlobRef.h
index 7ef37f5f..b1efc983 100644
--- a/src/cryfs/filesystem/cachingfsblobstore/DirBlobRef.h
+++ b/src/cryfs/filesystem/cachingfsblobstore/DirBlobRef.h
@@ -60,6 +60,14 @@ public:
         return _base->statChildExceptSize(key, result);
     }
 
+    void updateAccessTimestampForChild(const blockstore::Key &key) {
+        return _base->updateAccessTimestampForChild(key);
+    }
+
+    void updateModificationTimestampForChild(const blockstore::Key &key) {
+        return _base->updateModificationTimestampForChild(key);
+    }
+
     void chmodChild(const blockstore::Key &key, mode_t mode) {
         return _base->chmodChild(key, mode);
     }
diff --git a/src/cryfs/filesystem/fsblobstore/DirBlob.cpp b/src/cryfs/filesystem/fsblobstore/DirBlob.cpp
index dc3a28da..194dd6fb 100644
--- a/src/cryfs/filesystem/fsblobstore/DirBlob.cpp
+++ b/src/cryfs/filesystem/fsblobstore/DirBlob.cpp
@@ -158,6 +158,16 @@ void DirBlob::statChildExceptSize(const Key &key, struct ::stat *result) const {
   result->st_blksize = _fsBlobStore->virtualBlocksizeBytes();
 }
 
+void DirBlob::updateAccessTimestampForChild(const Key &key) {
+  std::unique_lock<std::mutex> lock(_mutex);
+  _entries.updateAccessTimestampForChild(key);
+}
+
+void DirBlob::updateModificationTimestampForChild(const Key &key) {
+  std::unique_lock<std::mutex> lock(_mutex);
+  _entries.updateModificationTimestampForChild(key);
+}
+
 void DirBlob::chmodChild(const Key &key, mode_t mode) {
   std::unique_lock<std::mutex> lock(_mutex);
   _entries.setMode(key, mode);
diff --git a/src/cryfs/filesystem/fsblobstore/DirBlob.h b/src/cryfs/filesystem/fsblobstore/DirBlob.h
index 4875f197..0851f37d 100644
--- a/src/cryfs/filesystem/fsblobstore/DirBlob.h
+++ b/src/cryfs/filesystem/fsblobstore/DirBlob.h
@@ -59,6 +59,10 @@ namespace cryfs {
 
             void statChildExceptSize(const blockstore::Key &key, struct ::stat *result) const;
 
+            void updateAccessTimestampForChild(const blockstore::Key &key);
+
+            void updateModificationTimestampForChild(const blockstore::Key &key);
+
             void chmodChild(const blockstore::Key &key, mode_t mode);
 
             void chownChild(const blockstore::Key &key, uid_t uid, gid_t gid);
diff --git a/src/cryfs/filesystem/fsblobstore/utils/DirEntryList.cpp b/src/cryfs/filesystem/fsblobstore/utils/DirEntryList.cpp
index 53025e01..8ca6f514 100644
--- a/src/cryfs/filesystem/fsblobstore/utils/DirEntryList.cpp
+++ b/src/cryfs/filesystem/fsblobstore/utils/DirEntryList.cpp
@@ -228,5 +228,15 @@ void DirEntryList::setAccessTimes(const blockstore::Key &key, timespec lastAcces
     found->setLastModificationTime(lastModificationTime);
 }
 
+void DirEntryList::updateAccessTimestampForChild(const blockstore::Key &key) {
+    auto found = _findByKey(key);
+    found->setLastAccessTime(cpputils::time::now());
+}
+
+void DirEntryList::updateModificationTimestampForChild(const blockstore::Key &key) {
+    auto found = _findByKey(key);
+    found->setLastModificationTime(cpputils::time::now());
+}
+
 }
 }
diff --git a/src/cryfs/filesystem/fsblobstore/utils/DirEntryList.h b/src/cryfs/filesystem/fsblobstore/utils/DirEntryList.h
index c3cc32b3..8f3e98dc 100644
--- a/src/cryfs/filesystem/fsblobstore/utils/DirEntryList.h
+++ b/src/cryfs/filesystem/fsblobstore/utils/DirEntryList.h
@@ -39,6 +39,8 @@ namespace cryfs {
             void setMode(const blockstore::Key &key, mode_t mode);
             bool setUidGid(const blockstore::Key &key, uid_t uid, gid_t gid);
             void setAccessTimes(const blockstore::Key &key, timespec lastAccessTime, timespec lastModificationTime);
+            void updateAccessTimestampForChild(const blockstore::Key &key);
+            void updateModificationTimestampForChild(const blockstore::Key &key);
 
         private:
             uint64_t _serializedSize() const;
diff --git a/src/cryfs/filesystem/parallelaccessfsblobstore/DirBlobRef.h b/src/cryfs/filesystem/parallelaccessfsblobstore/DirBlobRef.h
index 9e596f93..46a42226 100644
--- a/src/cryfs/filesystem/parallelaccessfsblobstore/DirBlobRef.h
+++ b/src/cryfs/filesystem/parallelaccessfsblobstore/DirBlobRef.h
@@ -56,6 +56,14 @@ public:
         return _base->statChildExceptSize(key, result);
     }
 
+    void updateAccessTimestampForChild(const blockstore::Key &key) {
+        return _base->updateAccessTimestampForChild(key);
+    }
+
+    void updateModificationTimestampForChild(const blockstore::Key &key) {
+        return _base->updateModificationTimestampForChild(key);
+    }
+
     void chmodChild(const blockstore::Key &key, mode_t mode) {
         return _base->chmodChild(key, mode);
     }
diff --git a/src/fspp/fs_interface/File.h b/src/fspp/fs_interface/File.h
index 74084303..7ca7551c 100644
--- a/src/fspp/fs_interface/File.h
+++ b/src/fspp/fs_interface/File.h
@@ -13,8 +13,8 @@ class File: public virtual Node {
 public:
   virtual ~File() {}
 
-  virtual cpputils::unique_ref<OpenFile> open(int flags) const = 0;
-  virtual void truncate(off_t size) const = 0;
+  virtual cpputils::unique_ref<OpenFile> open(int flags) = 0;
+  virtual void truncate(off_t size) = 0;
 };
 
 }
diff --git a/src/fspp/fstest/FsTest.h b/src/fspp/fstest/FsTest.h
index fb9b5d9b..ee6900ad 100644
--- a/src/fspp/fstest/FsTest.h
+++ b/src/fspp/fstest/FsTest.h
@@ -9,9 +9,10 @@
 #include "FsppSymlinkTest.h"
 #include "FsppNodeTest_Rename.h"
 #include "FsppNodeTest_Stat.h"
-#include "FsppNodeTest_Timestamps.h"
 #include "FsppOpenFileTest.h"
 #include "FsppDeviceTest_Timestamps.h"
+#include "FsppNodeTest_Timestamps.h"
+#include "FsppOpenFileTest_Timestamps.h"
 
 #define FSPP_ADD_FILESYTEM_TESTS(FS_NAME, FIXTURE) \
   INSTANTIATE_TYPED_TEST_CASE_P(FS_NAME, FsppDeviceTest,                FIXTURE);  \
@@ -26,5 +27,7 @@
   INSTANTIATE_TYPED_TEST_CASE_P(FS_NAME, FsppNodeTest_Stat_DirOnly,     FIXTURE);  \
   INSTANTIATE_TYPED_TEST_CASE_P(FS_NAME, FsppNodeTest_Stat_SymlinkOnly, FIXTURE);  \
   INSTANTIATE_TYPED_TEST_CASE_P(FS_NAME, FsppOpenFileTest,              FIXTURE);  \
+  INSTANTIATE_TYPED_TEST_CASE_P(FS_NAME, FsppOpenFileTest_Timestamps,   FIXTURE);  \
+
 
 #endif
diff --git a/src/fspp/fstest/FsppFileTest.h b/src/fspp/fstest/FsppFileTest.h
index 18b1f9b0..805ed6b3 100644
--- a/src/fspp/fstest/FsppFileTest.h
+++ b/src/fspp/fstest/FsppFileTest.h
@@ -24,54 +24,54 @@ public:
 
   void Test_Truncate_DontChange1(fspp::File *file) {
 	file->truncate(0);
-	this->EXPECT_SIZE(0, *file);
+	this->EXPECT_SIZE(0, file);
   }
 
   void Test_Truncate_GrowTo1(fspp::File *file) {
 	file->truncate(1);
-	this->EXPECT_SIZE(1, *file);
+	this->EXPECT_SIZE(1, file);
   }
 
   void Test_Truncate_Grow(fspp::File *file) {
 	file->truncate(10*1024*1024);
-	this->EXPECT_SIZE(10*1024*1024, *file);
+	this->EXPECT_SIZE(10*1024*1024, file);
   }
 
   void Test_Truncate_DontChange2(fspp::File *file) {
 	file->truncate(10*1024*1024);
 	file->truncate(10*1024*1024);
-	this->EXPECT_SIZE(10*1024*1024, *file);
+	this->EXPECT_SIZE(10*1024*1024, file);
   }
 
   void Test_Truncate_Shrink(fspp::File *file) {
     file->truncate(10*1024*1024);
     file->truncate(5*1024*1024);
-    this->EXPECT_SIZE(5*1024*1024, *file);
+    this->EXPECT_SIZE(5*1024*1024, file);
   }
 
   void Test_Truncate_ShrinkTo0(fspp::File *file) {
 	file->truncate(10*1024*1024);
 	file->truncate(0);
-	this->EXPECT_SIZE(0, *file);
+	this->EXPECT_SIZE(0, file);
   }
 
   void Test_Chown_Uid(fspp::File *file) {
       file->chown(100, 200);
-      this->IN_STAT(*file, [] (struct stat st){
+      this->IN_STAT(file, [] (struct stat st){
           EXPECT_EQ(100u, st.st_uid);
       });
   }
 
   void Test_Chown_Gid(fspp::File *file) {
     file->chown(100, 200);
-    this->IN_STAT(*file, [] (struct stat st){
+    this->IN_STAT(file, [] (struct stat st){
         EXPECT_EQ(200u, st.st_gid);
     });
   }
 
   void Test_Chmod(fspp::File *file) {
     file->chmod(S_IFREG | S_IRUSR | S_IWOTH);
-    this->IN_STAT(*file, [] (struct stat st){
+    this->IN_STAT(file, [] (struct stat st){
         EXPECT_EQ((mode_t)(S_IFREG | S_IRUSR | S_IWOTH), st.st_mode);
     });
   }
@@ -80,7 +80,7 @@ public:
     struct timespec ATIME; ATIME.tv_sec = 1458086400; ATIME.tv_nsec = 34525;
     struct timespec MTIME; MTIME.tv_sec = 1458086300; MTIME.tv_nsec = 48293;
     file->utimens(ATIME, MTIME);
-    this->IN_STAT(*file, [this, ATIME, MTIME] (struct stat st) {
+    this->IN_STAT(file, [this, ATIME, MTIME] (struct stat st) {
         this->EXPECT_ATIME_EQ(ATIME, st);
         this->EXPECT_MTIME_EQ(MTIME, st);
     });
diff --git a/src/fspp/fstest/FsppNodeTest_Stat.h b/src/fspp/fstest/FsppNodeTest_Stat.h
index e31996ef..0f82d209 100644
--- a/src/fspp/fstest/FsppNodeTest_Stat.h
+++ b/src/fspp/fstest/FsppNodeTest_Stat.h
@@ -10,7 +10,7 @@ class FsppNodeTest_Stat: public FsppNodeTest<ConcreteFileSystemTestFixture> {
 public:
     void Test_Nlink() {
         auto node = this->CreateNode("/mynode");
-        this->IN_STAT(*node, [] (struct stat st) {
+        this->IN_STAT(node.get(), [] (struct stat st) {
             EXPECT_EQ(1u, st.st_nlink);
         });
     }
@@ -24,12 +24,12 @@ TYPED_TEST_CASE_P(FsppNodeTest_Stat_FileOnly);
 
 TYPED_TEST_P(FsppNodeTest_Stat_FileOnly, CreatedFileIsEmpty) {
     auto file = this->CreateFile("/myfile");
-    this->EXPECT_SIZE(0, *file);
+    this->EXPECT_SIZE(0, file.get());
 }
 
 TYPED_TEST_P(FsppNodeTest_Stat_FileOnly, FileIsFile) {
     auto file = this->CreateFile("/myfile");
-    this->IN_STAT(*file, [] (struct stat st) {
+    this->IN_STAT(file.get(), [] (struct stat st) {
         EXPECT_TRUE(S_ISREG(st.st_mode));
     });
 }
@@ -42,7 +42,7 @@ TYPED_TEST_CASE_P(FsppNodeTest_Stat_DirOnly);
 
 TYPED_TEST_P(FsppNodeTest_Stat_DirOnly, DirIsDir) {
     auto file = this->CreateDir("/mydir");
-    this->IN_STAT(*file, [] (struct stat st) {
+    this->IN_STAT(file.get(), [] (struct stat st) {
         EXPECT_TRUE(S_ISDIR(st.st_mode));
     });
 }
@@ -55,7 +55,7 @@ TYPED_TEST_CASE_P(FsppNodeTest_Stat_SymlinkOnly);
 
 TYPED_TEST_P(FsppNodeTest_Stat_SymlinkOnly, SymlinkIsSymlink) {
     auto file = this->CreateSymlink("/mysymlink");
-    this->IN_STAT(*file, [] (struct stat st) {
+    this->IN_STAT(file.get(), [] (struct stat st) {
         EXPECT_TRUE(S_ISLNK(st.st_mode));
     });
 }
diff --git a/src/fspp/fstest/FsppOpenFileTest_Timestamps.h b/src/fspp/fstest/FsppOpenFileTest_Timestamps.h
new file mode 100644
index 00000000..02b4ef52
--- /dev/null
+++ b/src/fspp/fstest/FsppOpenFileTest_Timestamps.h
@@ -0,0 +1,149 @@
+#pragma once
+#ifndef MESSMER_FSPP_FSTEST_FSPPOPENFILETEST_TIMESTAMPS_H_
+#define MESSMER_FSPP_FSTEST_FSPPOPENFILETEST_TIMESTAMPS_H_
+
+#include "testutils/TimestampTestUtils.h"
+
+template<class ConcreteFileSystemTestFixture>
+class FsppOpenFileTest_Timestamps: public FileSystemTest<ConcreteFileSystemTestFixture>, public TimestampTestUtils<fspp::OpenFile> {
+public:
+    cpputils::unique_ref<fspp::OpenFile> CreateAndOpenFile(const boost::filesystem::path &path) {
+        return this->CreateFile(path)->open(O_RDWR);
+    }
+    cpputils::unique_ref<fspp::OpenFile> CreateAndOpenFileWithSize(const boost::filesystem::path &path, off_t size) {
+        auto file = this->CreateFile(path);
+        file->truncate(size);
+        auto openFile = file->open(O_RDWR);
+        assert(stat(*openFile).st_size == size);
+        return openFile;
+    }
+};
+TYPED_TEST_CASE_P(FsppOpenFileTest_Timestamps);
+
+TYPED_TEST_P(FsppOpenFileTest_Timestamps, stat) {
+    auto openFile = this->CreateAndOpenFile("/mynode");
+    auto operation = [&openFile] () {
+        struct ::stat st;
+        openFile->stat(&st);
+    };
+    this->EXPECT_OPERATION_UPDATES_TIMESTAMPS_AS(*openFile, operation, {this->ExpectDoesntUpdateAnyTimestamps});
+}
+
+TYPED_TEST_P(FsppOpenFileTest_Timestamps, truncate_empty_to_empty) {
+    auto openFile = this->CreateAndOpenFileWithSize("/myfile", 0);
+    auto operation = [&openFile] () {
+        openFile->truncate(0);
+    };
+    this->EXPECT_OPERATION_UPDATES_TIMESTAMPS_AS(*openFile, operation, {this->ExpectDoesntUpdateAccessTimestamp, this->ExpectUpdatesModificationTimestamp, this->ExpectUpdatesMetadataTimestamp});
+}
+
+TYPED_TEST_P(FsppOpenFileTest_Timestamps, truncate_empty_to_nonempty) {
+    auto openFile = this->CreateAndOpenFileWithSize("/myfile", 0);
+    auto operation = [&openFile] () {
+        openFile->truncate(10);
+    };
+    this->EXPECT_OPERATION_UPDATES_TIMESTAMPS_AS(*openFile, operation, {this->ExpectDoesntUpdateAccessTimestamp, this->ExpectUpdatesModificationTimestamp, this->ExpectUpdatesMetadataTimestamp});
+}
+
+TYPED_TEST_P(FsppOpenFileTest_Timestamps, truncate_nonempty_to_empty) {
+    auto openFile = this->CreateAndOpenFileWithSize("/myfile", 10);
+    auto operation = [&openFile] () {
+        openFile->truncate(0);
+    };
+    this->EXPECT_OPERATION_UPDATES_TIMESTAMPS_AS(*openFile, operation, {this->ExpectDoesntUpdateAccessTimestamp, this->ExpectUpdatesModificationTimestamp, this->ExpectUpdatesMetadataTimestamp});
+}
+
+TYPED_TEST_P(FsppOpenFileTest_Timestamps, truncate_nonempty_to_nonempty_shrink) {
+    auto openFile = this->CreateAndOpenFileWithSize("/myfile", 10);
+    auto operation = [&openFile] () {
+        openFile->truncate(5);
+    };
+    this->EXPECT_OPERATION_UPDATES_TIMESTAMPS_AS(*openFile, operation, {this->ExpectDoesntUpdateAccessTimestamp, this->ExpectUpdatesModificationTimestamp, this->ExpectUpdatesMetadataTimestamp});
+}
+
+TYPED_TEST_P(FsppOpenFileTest_Timestamps, truncate_nonempty_to_nonempty_grow) {
+    auto openFile = this->CreateAndOpenFileWithSize("/myfile", 10);
+    auto operation = [&openFile] () {
+        openFile->truncate(20);
+    };
+    this->EXPECT_OPERATION_UPDATES_TIMESTAMPS_AS(*openFile, operation, {this->ExpectDoesntUpdateAccessTimestamp, this->ExpectUpdatesModificationTimestamp, this->ExpectUpdatesMetadataTimestamp});
+}
+
+TYPED_TEST_P(FsppOpenFileTest_Timestamps, read_inbounds) {
+    auto openFile = this->CreateAndOpenFileWithSize("/myfile", 10);
+    auto operation = [&openFile] () {
+        char buffer[5];
+        openFile->read(buffer, 5, 0);
+    };
+    this->EXPECT_OPERATION_UPDATES_TIMESTAMPS_AS(*openFile, operation, {this->ExpectUpdatesAccessTimestamp, this->ExpectDoesntUpdateModificationTimestamp, this->ExpectDoesntUpdateMetadataTimestamp});
+}
+
+TYPED_TEST_P(FsppOpenFileTest_Timestamps, read_outofbounds) {
+    auto openFile = this->CreateAndOpenFileWithSize("/myfile", 0);
+    auto operation = [&openFile] () {
+        char buffer[5];
+        openFile->read(buffer, 5, 2);
+    };
+    this->EXPECT_OPERATION_UPDATES_TIMESTAMPS_AS(*openFile, operation, {this->ExpectUpdatesAccessTimestamp, this->ExpectDoesntUpdateModificationTimestamp, this->ExpectDoesntUpdateMetadataTimestamp});
+}
+
+TYPED_TEST_P(FsppOpenFileTest_Timestamps, write_inbounds) {
+    auto openFile = this->CreateAndOpenFileWithSize("/myfile", 10);
+    auto operation = [&openFile] () {
+        openFile->write("content", 7, 0);
+    };
+    this->EXPECT_OPERATION_UPDATES_TIMESTAMPS_AS(*openFile, operation, {this->ExpectDoesntUpdateAccessTimestamp, this->ExpectUpdatesModificationTimestamp, this->ExpectUpdatesMetadataTimestamp});
+}
+
+TYPED_TEST_P(FsppOpenFileTest_Timestamps, write_outofbounds) {
+    auto openFile = this->CreateAndOpenFileWithSize("/myfile", 0);
+    auto operation = [&openFile] () {
+        openFile->write("content", 7, 2);
+    };
+    this->EXPECT_OPERATION_UPDATES_TIMESTAMPS_AS(*openFile, operation, {this->ExpectDoesntUpdateAccessTimestamp, this->ExpectUpdatesModificationTimestamp, this->ExpectUpdatesMetadataTimestamp});
+}
+
+TYPED_TEST_P(FsppOpenFileTest_Timestamps, flush) {
+    auto openFile = this->CreateAndOpenFileWithSize("/myfile", 10);
+    openFile->write("content", 7, 0);
+    auto operation = [&openFile] () {
+        openFile->flush();
+    };
+    this->EXPECT_OPERATION_UPDATES_TIMESTAMPS_AS(*openFile, operation, {this->ExpectDoesntUpdateAnyTimestamps});
+}
+
+TYPED_TEST_P(FsppOpenFileTest_Timestamps, fsync) {
+    auto openFile = this->CreateAndOpenFileWithSize("/myfile", 10);
+    openFile->write("content", 7, 0);
+    auto operation = [&openFile] () {
+        openFile->fsync();
+    };
+    this->EXPECT_OPERATION_UPDATES_TIMESTAMPS_AS(*openFile, operation, {this->ExpectDoesntUpdateAnyTimestamps});
+}
+
+TYPED_TEST_P(FsppOpenFileTest_Timestamps, fdatasync) {
+    auto openFile = this->CreateAndOpenFileWithSize("/myfile", 10);
+    openFile->write("content", 7, 0);
+    auto operation = [&openFile] () {
+        openFile->fdatasync();
+    };
+    this->EXPECT_OPERATION_UPDATES_TIMESTAMPS_AS(*openFile, operation, {this->ExpectDoesntUpdateAnyTimestamps});
+}
+
+REGISTER_TYPED_TEST_CASE_P(FsppOpenFileTest_Timestamps,
+   stat,
+   truncate_empty_to_empty,
+   truncate_empty_to_nonempty,
+   truncate_nonempty_to_empty,
+   truncate_nonempty_to_nonempty_shrink,
+   truncate_nonempty_to_nonempty_grow,
+   read_inbounds,
+   read_outofbounds,
+   write_inbounds,
+   write_outofbounds,
+   flush,
+   fsync,
+   fdatasync
+);
+
+#endif
diff --git a/src/fspp/fstest/testutils/FileTest.h b/src/fspp/fstest/testutils/FileTest.h
index 64119295..c0f282e4 100644
--- a/src/fspp/fstest/testutils/FileTest.h
+++ b/src/fspp/fstest/testutils/FileTest.h
@@ -24,15 +24,15 @@ public:
   std::unique_ptr<fspp::File> file_nested;
 
   //TODO IN_STAT still needed after moving it to FsppNodeTest?
-  void IN_STAT(const fspp::File &file, std::function<void (struct stat)> callback) {
+  void IN_STAT(fspp::File *file, std::function<void (struct stat)> callback) {
 	  struct stat st1, st2;
-	  file.stat(&st1);
+	  file->stat(&st1);
 	  callback(st1);
-	  file.open(O_RDONLY)->stat(&st2);
+	  file->open(O_RDONLY)->stat(&st2);
 	  callback(st2);
   }
 
-  void EXPECT_SIZE(uint64_t expectedSize, const fspp::File &file) {
+  void EXPECT_SIZE(uint64_t expectedSize, fspp::File *file) {
 	IN_STAT(file, [expectedSize] (struct stat st) {
 		EXPECT_EQ(expectedSize, (uint64_t)st.st_size);
 	});
@@ -40,8 +40,8 @@ public:
 	EXPECT_NUMBYTES_READABLE(expectedSize, file);
   }
 
-  void EXPECT_NUMBYTES_READABLE(uint64_t expectedSize, const fspp::File &file) {
-	auto openFile = file.open(O_RDONLY);
+  void EXPECT_NUMBYTES_READABLE(uint64_t expectedSize, fspp::File *file) {
+	auto openFile = file->open(O_RDONLY);
 	cpputils::Data data(expectedSize);
 	//Try to read one byte more than the expected size
 	ssize_t readBytes = openFile->read(data.data(), expectedSize+1, 0);
diff --git a/src/fspp/fstest/testutils/FsppNodeTest.h b/src/fspp/fstest/testutils/FsppNodeTest.h
index ff731f10..cc1c764b 100644
--- a/src/fspp/fstest/testutils/FsppNodeTest.h
+++ b/src/fspp/fstest/testutils/FsppNodeTest.h
@@ -9,8 +9,8 @@
 
 class FsppNodeTestBase {
 public:
-    virtual void IN_STAT(const fspp::Node &node, std::function<void (struct stat)> callback) = 0;
-    virtual void EXPECT_SIZE(uint64_t expectedSize, const fspp::Node &node) = 0;
+    virtual void IN_STAT(fspp::Node *node, std::function<void (struct stat)> callback) = 0;
+    virtual void EXPECT_SIZE(uint64_t expectedSize, fspp::Node *node) = 0;
 };
 
 /**
@@ -29,24 +29,24 @@ public:
 
 class FsppNodeTest_File_Helper: public virtual FsppNodeTestBase {
 public:
-    void IN_STAT(const fspp::Node &file, std::function<void (struct stat)> callback) override {
+    void IN_STAT(fspp::Node *file, std::function<void (struct stat)> callback) override {
         struct stat st1, st2;
-        file.stat(&st1);
+        file->stat(&st1);
         callback(st1);
-        dynamic_cast<const fspp::File &>(file).open(O_RDONLY)->stat(&st2);
+        dynamic_cast<fspp::File &>(*file).open(O_RDONLY)->stat(&st2);
         callback(st2);
     }
 
-    void EXPECT_SIZE(uint64_t expectedSize, const fspp::Node &node) override {
+    void EXPECT_SIZE(uint64_t expectedSize, fspp::Node *node) override {
         IN_STAT(node, [expectedSize] (struct stat st) {
             EXPECT_EQ(expectedSize, (uint64_t)st.st_size);
         });
 
-        EXPECT_NUMBYTES_READABLE(expectedSize, dynamic_cast<const fspp::File&>(node));
+        EXPECT_NUMBYTES_READABLE(expectedSize, dynamic_cast<fspp::File*>(node));
     }
 
-    void EXPECT_NUMBYTES_READABLE(uint64_t expectedSize, const fspp::File &file) {
-        auto openFile = file.open(O_RDONLY);
+    void EXPECT_NUMBYTES_READABLE(uint64_t expectedSize, fspp::File *file) {
+        auto openFile = file->open(O_RDONLY);
         cpputils::Data data(expectedSize);
         //Try to read one byte more than the expected size
         ssize_t readBytes = openFile->read(data.data(), expectedSize+1, 0);
@@ -57,13 +57,13 @@ public:
 
 class FsppNodeTest_Dir_Helper: public virtual FsppNodeTestBase {
 public:
-    void IN_STAT(const fspp::Node &file, std::function<void (struct stat)> callback) override {
+    void IN_STAT(fspp::Node *file, std::function<void (struct stat)> callback) override {
         struct stat st;
-        file.stat(&st);
+        file->stat(&st);
         callback(st);
     }
 
-    void EXPECT_SIZE(uint64_t expectedSize, const fspp::Node &node) override {
+    void EXPECT_SIZE(uint64_t expectedSize, fspp::Node *node) override {
         IN_STAT(node, [expectedSize] (struct stat st) {
             EXPECT_EQ(expectedSize, (uint64_t)st.st_size);
         });
@@ -72,13 +72,13 @@ public:
 
 class FsppNodeTest_Symlink_Helper: public virtual FsppNodeTestBase {
 public:
-    void IN_STAT(const fspp::Node &file, std::function<void (struct stat)> callback) override {
+    void IN_STAT(fspp::Node *file, std::function<void (struct stat)> callback) override {
         struct stat st;
-        file.stat(&st);
+        file->stat(&st);
         callback(st);
     }
 
-    void EXPECT_SIZE(uint64_t expectedSize, const fspp::Node &node) override {
+    void EXPECT_SIZE(uint64_t expectedSize, fspp::Node *node) override {
         IN_STAT(node, [expectedSize] (struct stat st) {
             EXPECT_EQ(expectedSize, (uint64_t)st.st_size);
         });
diff --git a/src/fspp/impl/FilesystemImpl.cpp b/src/fspp/impl/FilesystemImpl.cpp
index 1be269de..d9bff72f 100644
--- a/src/fspp/impl/FilesystemImpl.cpp
+++ b/src/fspp/impl/FilesystemImpl.cpp
@@ -151,12 +151,12 @@ unique_ref<Node> FilesystemImpl::LoadFileOrSymlink(const bf::path &path) {
 
 int FilesystemImpl::openFile(const bf::path &path, int flags) {
   auto file = LoadFile(path);
-  return openFile(*file, flags);
+  return openFile(file.get(), flags);
 }
 
-int FilesystemImpl::openFile(const File &file, int flags) {
+int FilesystemImpl::openFile(File *file, int flags) {
   PROFILE(_openFileNanosec);
-  return _open_files.open(file.open(flags));
+  return _open_files.open(file->open(flags));
 }
 
 void FilesystemImpl::flush(int descriptor) {
diff --git a/src/fspp/impl/FilesystemImpl.h b/src/fspp/impl/FilesystemImpl.h
index 8af1fab1..f0e21be6 100644
--- a/src/fspp/impl/FilesystemImpl.h
+++ b/src/fspp/impl/FilesystemImpl.h
@@ -54,7 +54,7 @@ private:
 	cpputils::unique_ref<Dir> LoadDir(const boost::filesystem::path &path);
 	cpputils::unique_ref<Symlink> LoadSymlink(const boost::filesystem::path &path);
 	cpputils::unique_ref<Node> LoadFileOrSymlink(const boost::filesystem::path &path);
-	int openFile(const File &file, int flags);
+	int openFile(File *file, int flags);
 
 #ifdef FSPP_PROFILE
     std::atomic<uint64_t> _loadFileNanosec;