diff --git a/internal/dir.go b/internal/dir.go
index 98de75f1..5a349495 100644
--- a/internal/dir.go
+++ b/internal/dir.go
@@ -725,7 +725,7 @@ func (dh *DirHandle) ReadDir(internalOffset int, offset fuseops.DirOffset) (en *
 		}
 	}
 
-	if len(notifications) > 0 {
+	if len(notifications) > 0 && fs.NotifyCallback != nil {
 		fs.NotifyCallback(notifications)
 	}
 
diff --git a/internal/goofys.go b/internal/goofys.go
index b9223cd5..c5cbe8f5 100644
--- a/internal/goofys.go
+++ b/internal/goofys.go
@@ -867,7 +867,9 @@ func (fs *Goofys) RefreshInodeCache(inode *Inode) error {
 		}
 		dh.CloseDir()
 		dh.mu.Unlock()
-		fs.NotifyCallback(notifications)
+		if fs.NotifyCallback != nil {
+			fs.NotifyCallback(notifications)
+		}
 		return mappedErr
 	}
 	inode, err := parent.recheckInode(inode, name)
@@ -884,7 +886,9 @@ func (fs *Goofys) RefreshInodeCache(inode *Inode) error {
 			Name: name,
 		})
 	}
-	fs.NotifyCallback(notifications)
+	if fs.NotifyCallback != nil {
+		fs.NotifyCallback(notifications)
+	}
 	if mappedErr == syscall.ENOENT {
 		// We don't mind if the file disappeared
 		return nil
diff --git a/internal/goofys_fs_test.go b/internal/goofys_fs_test.go
index 98971778..fb28d0ee 100644
--- a/internal/goofys_fs_test.go
+++ b/internal/goofys_fs_test.go
@@ -23,8 +23,8 @@ import (
 	"io/fs"
 	"io/ioutil"
 	"os"
-	"os/exec"
 	"path/filepath"
+	"runtime"
 	"syscall"
 	"time"
 
@@ -90,7 +90,7 @@ func (s *GoofysTest) TestWriteAnonymousFuse(t *C) {
 	t.Assert(err, NotNil)
 	pathErr, ok := err.(*os.PathError)
 	t.Assert(ok, Equals, true)
-	t.Assert(pathErr.Err, Equals, syscall.EACCES)
+	t.Assert(IsAccessDenied(pathErr.Err), Equals, true)
 
 	err = file.Close()
 	t.Assert(err, IsNil)
@@ -281,61 +281,53 @@ func (s *GoofysTest) TestRmdirWithDiropen(t *C) {
 	err = os.MkdirAll(mountPoint+"/dir2/dir5", 0700)
 	t.Assert(err, IsNil)
 
-	//1, open dir5
+	// 1, open dir5
 	dir := mountPoint + "/dir2/dir5"
 	fh, err := os.Open(dir)
 	t.Assert(err, IsNil)
 	defer fh.Close()
 
-	cmd1 := exec.Command("ls", mountPoint+"/dir2")
-	//out, err := cmd.Output()
-	out1, err1 := cmd1.Output()
-	if err1 != nil {
-		if ee, ok := err.(*exec.ExitError); ok {
-			panic(ee.Stderr)
-		}
-	}
-	t.Assert(string(out1), DeepEquals, ""+"dir3\n"+"dir4\n"+"dir5\n")
-
-	//2, rm -rf dir5
-	cmd := exec.Command("rm", "-rf", dir)
-	_, err = cmd.Output()
-	if err != nil {
-		if ee, ok := err.(*exec.ExitError); ok {
-			panic(ee.Stderr)
-		}
+	fh2, err := os.Open(mountPoint + "/dir2")
+	t.Assert(err, IsNil)
+	defer fh2.Close()
+	names, err := fh2.Readdirnames(0)
+	t.Assert(err, IsNil)
+	t.Assert(names, DeepEquals, []string{"dir3", "dir4", "dir5"})
+	fh2.Close()
+
+	// 2, remove dir5
+	if runtime.GOOS == "windows" {
+		// Can't remove opened files under Windows
+		err = fh.Close()
+		t.Assert(err, IsNil)
 	}
+	err = os.RemoveAll(dir)
+	t.Assert(err, IsNil)
 
-	//3,  readdir dir2
+	// 3, readdir dir2
 	fh1, err := os.Open(mountPoint + "/dir2")
 	t.Assert(err, IsNil)
-	defer func() {
-		// close the file if the test failed so we can unmount
-		if fh1 != nil {
-			fh1.Close()
-		}
-	}()
-
-	names, err := fh1.Readdirnames(0)
+	defer fh1.Close()
+	names, err = fh1.Readdirnames(0)
 	t.Assert(err, IsNil)
 	t.Assert(names, DeepEquals, []string{"dir3", "dir4"})
 
-	cmd = exec.Command("ls", mountPoint+"/dir2")
-	out, err := cmd.Output()
-	if err != nil {
-		if ee, ok := err.(*exec.ExitError); ok {
-			panic(ee.Stderr)
-		}
-	}
-
-	t.Assert(string(out), DeepEquals, ""+"dir3\n"+"dir4\n")
+	fh2, err = os.Open(mountPoint + "/dir2")
+	t.Assert(err, IsNil)
+	names, err = fh2.Readdirnames(0)
+	t.Assert(err, IsNil)
+	t.Assert(names, DeepEquals, []string{"dir3", "dir4"})
+	err = fh2.Close()
+	t.Assert(err, IsNil)
 
 	err = fh1.Close()
 	t.Assert(err, IsNil)
 
-	// 4,reset env
-	err = fh.Close()
-	t.Assert(err, IsNil)
+	// 4, reset env
+	if runtime.GOOS != "windows" {
+		err = fh.Close()
+		t.Assert(err, IsNil)
+	}
 
 	err = os.RemoveAll(mountPoint + "/dir2/dir4")
 	t.Assert(err, IsNil)
@@ -353,12 +345,14 @@ func (s *GoofysTest) TestRmImplicitDir(t *C) {
 	t.Assert(err, IsNil)
 	defer os.Chdir(oldCwd)
 
-	dir, err := os.Open(mountPoint + "/test_rm_implicit_dir/dir2")
-	t.Assert(err, IsNil)
-	defer dir.Close()
+	if runtime.GOOS != "windows" {
+		dir, err := os.Open(mountPoint + "/test_rm_implicit_dir/dir2")
+		t.Assert(err, IsNil)
+		defer dir.Close()
 
-	err = dir.Chdir()
-	t.Assert(err, IsNil)
+		err = os.Chdir(mountPoint + "/test_rm_implicit_dir/dir2")
+		t.Assert(err, IsNil)
+	}
 
 	err = os.RemoveAll(mountPoint + "/test_rm_implicit_dir/dir2")
 	t.Assert(err, IsNil)
diff --git a/internal/goofys_test.go b/internal/goofys_test.go
index 2de1be1b..83d69571 100644
--- a/internal/goofys_test.go
+++ b/internal/goofys_test.go
@@ -1328,7 +1328,7 @@ func (s *GoofysTest) TestWriteAnonymous(t *C) {
 	t.Assert(err, IsNil)
 
 	err = in.SyncFile()
-	t.Assert(err, Equals, syscall.EACCES)
+	t.Assert(mapAwsError(err), Equals, syscall.EACCES)
 
 	fh.Release()
 }
@@ -1832,84 +1832,6 @@ func (s *GoofysTest) TestRead403(t *C) {
 	t.Assert(mapAwsError(err), Equals, syscall.EACCES)
 }
 
-func (s *GoofysTest) TestDirMTime(t *C) {
-	s.fs.flags.StatCacheTTL = 1 * time.Minute
-	// enable cheap to ensure GET dir/ will come back before LIST dir/
-	s.fs.flags.Cheap = true
-
-	root := s.getRoot(t)
-	t.Assert(time.Time{}.Before(root.Attributes.Mtime), Equals, true)
-
-	dir1, err := s.fs.LookupPath("dir1")
-	t.Assert(err, IsNil)
-
-	attr1 := dir1.GetAttributes()
-	m1 := attr1.Mtime
-
-	time.Sleep(2 * time.Second)
-
-	dir2, err := dir1.MkDir("dir2")
-	t.Assert(err, IsNil)
-
-	attr2 := dir2.GetAttributes()
-	m2 := attr2.Mtime
-	t.Assert(m1.Add(2*time.Second).Before(m2), Equals, true)
-
-	// dir1 didn't have an explicit mtime, so it should update now
-	// that we did a mkdir inside it
-	attr1 = dir1.GetAttributes()
-	m1 = attr1.Mtime
-	t.Assert(m1, Equals, m2)
-
-	time.Sleep(2 * time.Second)
-
-	// different dir2
-	dir2, err = s.fs.LookupPath("dir2")
-	t.Assert(err, IsNil)
-
-	attr2 = dir2.GetAttributes()
-	m2 = attr2.Mtime
-
-	// this fails because we are listing dir/, which means we
-	// don't actually see the dir blob dir2/dir3/ (it's returned
-	// as common prefix), so we can't get dir3's mtime
-	if false {
-		// dir2/dir3/ exists and has mtime
-		s.readDirIntoCache(t, dir2.Id)
-		dir3, err := s.fs.LookupPath("dir2/dir3")
-		t.Assert(err, IsNil)
-
-		attr3 := dir3.GetAttributes()
-		// setupDefaultEnv is before mounting
-		t.Assert(attr3.Mtime.Before(m2), Equals, true)
-	}
-
-	time.Sleep(time.Second)
-
-	params := &PutBlobInput{
-		Key:  "dir2/newfile",
-		Body: bytes.NewReader([]byte("foo")),
-		Size: PUInt64(3),
-	}
-	_, err = s.cloud.PutBlob(params)
-	t.Assert(err, IsNil)
-
-	// dir2 could be already preloaded due to optimisations, it may have older mtime
-	// FIXME: (maybe) update parent directory modification times when flushing files inside them
-	s.fs.flags.StatCacheTTL = 1 * time.Second
-	s.readDirIntoCache(t, dir2.Id)
-	s.fs.flags.StatCacheTTL = 1 * time.Minute
-
-	newfile, err := dir2.LookUp("newfile", false)
-	t.Assert(err, IsNil)
-
-	attr2New := dir2.GetAttributes()
-	// mtime should reflect that of the latest object
-	// GCS can return nano second resolution so truncate to second for compare
-	t.Assert(attr2New.Mtime.Unix(), Equals, newfile.Attributes.Mtime.Unix())
-	t.Assert(m2.Before(attr2New.Mtime), Equals, true)
-}
-
 func (s *GoofysTest) TestDirMTimeNoTTL(t *C) {
 	if s.cloud.Capabilities().DirBlob {
 		t.Skip("Tests for behavior without dir blob")
diff --git a/internal/goofys_unix_test.go b/internal/goofys_unix_test.go
index 103f5807..8c0a2758 100644
--- a/internal/goofys_unix_test.go
+++ b/internal/goofys_unix_test.go
@@ -104,6 +104,10 @@ func FsyncDir(dir string) error {
 	return fh.Close()
 }
 
+func IsAccessDenied(err error) bool {
+	return err == syscall.EACCES
+}
+
 func (s *GoofysTest) SetUpSuite(t *C) {
 	s.tmp = os.Getenv("TMPDIR")
 	if s.tmp == "" {
@@ -714,3 +718,81 @@ func (s *GoofysTest) TestConcurrentRefDeref(t *C) {
 		})
 	}
 }
+
+func (s *GoofysTest) TestDirMTime(t *C) {
+	s.fs.flags.StatCacheTTL = 1 * time.Minute
+	// enable cheap to ensure GET dir/ will come back before LIST dir/
+	s.fs.flags.Cheap = true
+
+	root := s.getRoot(t)
+	t.Assert(time.Time{}.Before(root.Attributes.Mtime), Equals, true)
+
+	dir1, err := s.fs.LookupPath("dir1")
+	t.Assert(err, IsNil)
+
+	attr1 := dir1.GetAttributes()
+	m1 := attr1.Mtime
+
+	time.Sleep(2 * time.Second)
+
+	dir2, err := dir1.MkDir("dir2")
+	t.Assert(err, IsNil)
+
+	attr2 := dir2.GetAttributes()
+	m2 := attr2.Mtime
+	t.Assert(m1.Add(2*time.Second).Before(m2), Equals, true)
+
+	// dir1 didn't have an explicit mtime, so it should update now
+	// that we did a mkdir inside it
+	attr1 = dir1.GetAttributes()
+	m1 = attr1.Mtime
+	t.Assert(m1, Equals, m2)
+
+	time.Sleep(2 * time.Second)
+
+	// different dir2
+	dir2, err = s.fs.LookupPath("dir2")
+	t.Assert(err, IsNil)
+
+	attr2 = dir2.GetAttributes()
+	m2 = attr2.Mtime
+
+	// this fails because we are listing dir/, which means we
+	// don't actually see the dir blob dir2/dir3/ (it's returned
+	// as common prefix), so we can't get dir3's mtime
+	if false {
+		// dir2/dir3/ exists and has mtime
+		s.readDirIntoCache(t, dir2.Id)
+		dir3, err := s.fs.LookupPath("dir2/dir3")
+		t.Assert(err, IsNil)
+
+		attr3 := dir3.GetAttributes()
+		// setupDefaultEnv is before mounting
+		t.Assert(attr3.Mtime.Before(m2), Equals, true)
+	}
+
+	time.Sleep(time.Second)
+
+	params := &PutBlobInput{
+		Key:  "dir2/newfile",
+		Body: bytes.NewReader([]byte("foo")),
+		Size: PUInt64(3),
+	}
+	_, err = s.cloud.PutBlob(params)
+	t.Assert(err, IsNil)
+
+	// dir2 could be already preloaded due to optimisations, it may have older mtime
+	// FIXME: (maybe) update parent directory modification times when flushing files inside them
+	s.fs.flags.StatCacheTTL = 1 * time.Second
+	s.readDirIntoCache(t, dir2.Id)
+	s.fs.flags.StatCacheTTL = 1 * time.Minute
+
+	newfile, err := dir2.LookUp("newfile", false)
+	t.Assert(err, IsNil)
+
+	attr2New := dir2.GetAttributes()
+	// mtime should reflect that of the latest object
+	// GCS can return nano second resolution so truncate to second for compare
+	t.Assert(attr2New.Mtime.Unix(), Equals, newfile.Attributes.Mtime.Unix())
+	t.Assert(m2.Before(attr2New.Mtime), Equals, true)
+}
diff --git a/internal/goofys_windows.go b/internal/goofys_windows.go
index 29243ef4..9ec42ab9 100644
--- a/internal/goofys_windows.go
+++ b/internal/goofys_windows.go
@@ -72,7 +72,7 @@ func NewGoofysWin(fs *Goofys) *GoofysWin {
 	fsint := &GoofysWin{
 		Goofys: fs,
 	}
-	fsint.initCh = make(chan int)
+	fsint.initCh = make(chan int, 3)
 	fs.NotifyCallback = func(notifications []interface{}) {
 		fsint.Notify(notifications)
 	}
diff --git a/internal/goofys_windows_test.go b/internal/goofys_windows_test.go
index 2816aed7..12c2b043 100644
--- a/internal/goofys_windows_test.go
+++ b/internal/goofys_windows_test.go
@@ -67,3 +67,7 @@ func FsyncDir(dir string) error {
 	}
 	return err
 }
+
+func IsAccessDenied(err error) bool {
+	return err == syscall.EACCES || err == syscall.ERROR_ACCESS_DENIED
+}