diff --git a/docker/docker-compose.yml b/docker/docker-compose.yml
index b24db831d..27f0e0baf 100644
--- a/docker/docker-compose.yml
+++ b/docker/docker-compose.yml
@@ -471,6 +471,7 @@ services:
         environment:
             - TZ=Asia/Shanghai
             - DOCKER_TESTING_LOG_OFF="on"
+            - DOCKER_FLASHNODE_TMPFS_OFF="on"
             - http_proxy=
             - https_proxy=
             - HTTP_PROXY=
diff --git a/flashnode/cachengine/block_test.go b/flashnode/cachengine/block_test.go
index 734b06d0a..c322ce990 100644
--- a/flashnode/cachengine/block_test.go
+++ b/flashnode/cachengine/block_test.go
@@ -29,12 +29,16 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-func initTestTmpfs(size int64) (err error) {
+func initTestTmpfs() (umount func() error, err error) {
+	os.MkdirAll(testTmpFS, 0o777)
+	if !enabledTmpfs() {
+		return func() error { return os.RemoveAll(testTmpFS) }, nil
+	}
 	_, err = os.Stat(testTmpFS)
 	if err == nil {
 		if tmpfs.IsTmpfs(testTmpFS) {
 			if err = tmpfs.Umount(testTmpFS); err != nil {
-				return err
+				return
 			}
 		}
 	} else {
@@ -43,13 +47,17 @@ func initTestTmpfs(size int64) (err error) {
 		}
 		_ = os.MkdirAll(testTmpFS, 0o777)
 	}
-	err = tmpfs.MountTmpfs(testTmpFS, size)
-	return
+	if err = tmpfs.MountTmpfs(testTmpFS, 200*util.MB); err != nil {
+		return
+	}
+	return func() error { return tmpfs.Umount(testTmpFS) }, nil
 }
 
 func TestBlockWriteCache(t *testing.T) {
-	require.NoError(t, initTestTmpfs(200*util.MB))
-	defer func() { require.NoError(t, tmpfs.Umount(testTmpFS)) }()
+	umount, err := initTestTmpfs()
+	require.NoError(t, err)
+	defer func() { require.NoError(t, umount()) }()
+
 	testWriteSingleFile(t)
 	testWriteSingleFileError(t)
 	testWriteCacheBlockFull(t)
@@ -139,8 +147,9 @@ func testWriteMultiCacheBlock(t *testing.T, newMultiCacheFunc func(volume string
 }
 
 func TestBlockReadCache(t *testing.T) {
-	require.NoError(t, initTestTmpfs(200*util.MB))
-	defer func() { require.NoError(t, tmpfs.Umount(testTmpFS)) }()
+	umount, err := initTestTmpfs()
+	require.NoError(t, err)
+	defer func() { require.NoError(t, umount()) }()
 
 	cacheBlock := NewCacheBlock(testTmpFS, t.Name(), 1, 1024, 2568748711, proto.CACHE_BLOCK_SIZE, nil)
 	require.NoError(t, cacheBlock.initFilePath())
@@ -151,7 +160,7 @@ func TestBlockReadCache(t *testing.T) {
 	require.NoError(t, cacheBlock.WriteAt(bytes, offset, 1024))
 	cacheBlock.notifyReady()
 	bytesRead := make([]byte, 1024)
-	_, err := cacheBlock.Read(context.Background(), bytesRead, offset, 1024)
+	_, err = cacheBlock.Read(context.Background(), bytesRead, offset, 1024)
 	require.NoError(t, err)
 	require.Equal(t, bytesRead, bytes)
 }
@@ -163,8 +172,9 @@ func TestParallelOperation(t *testing.T) {
 }
 
 func testParallelOperation(t *testing.T) {
-	require.NoError(t, initTestTmpfs(200*util.MB))
-	defer func() { require.NoError(t, tmpfs.Umount(testTmpFS)) }()
+	umount, err := initTestTmpfs()
+	require.NoError(t, err)
+	defer func() { require.NoError(t, umount()) }()
 
 	cacheBlock := NewCacheBlock(testTmpFS, t.Name(), 1, 1024, 112456871, proto.CACHE_BLOCK_SIZE, nil)
 	require.NoError(t, cacheBlock.initFilePath())
diff --git a/flashnode/cachengine/engine.go b/flashnode/cachengine/engine.go
index 3823d6ed4..3f0ab6662 100644
--- a/flashnode/cachengine/engine.go
+++ b/flashnode/cachengine/engine.go
@@ -31,13 +31,9 @@ import (
 	"github.com/cubefs/cubefs/util/tmpfs"
 )
 
-//TODO: remove this later.
-//go:generate gofumpt -l -w .
-//go:generate git diff --exit-code
-//go:generate golangci-lint run --issues-exit-code=1 -D errcheck -E bodyclose ./...
-
 const (
 	prepareWorkers = 20
+	EnvDockerTmpfs = "DOCKER_FLASHNODE_TMPFS_OFF"
 
 	DefaultExpireTime        = 60 * 60
 	InitFileName             = "flash.init"
@@ -70,6 +66,8 @@ type CacheEngine struct {
 
 	closeOnce sync.Once
 	closeCh   chan struct{}
+
+	enableTmpfs bool // for testing in docker
 }
 
 type (
@@ -82,6 +80,7 @@ func NewCacheEngine(dataDir string, totalSize int64, maxUseRatio float64,
 ) (s *CacheEngine, err error) {
 	s = new(CacheEngine)
 	s.dataPath = dataDir
+	s.enableTmpfs = enabledTmpfs()
 	if maxUseRatio < 1e-1 {
 		maxUseRatio = DefaultCacheMaxUsedRatio
 	}
@@ -96,8 +95,10 @@ func NewCacheEngine(dataDir string, totalSize int64, maxUseRatio float64,
 	if err = os.MkdirAll(dataDir, 0o755); err != nil {
 		return nil, fmt.Errorf("NewCacheEngine [%v] err[%v]", dataDir, err)
 	}
-	if err = s.doMount(); err != nil {
-		return
+	if s.enableTmpfs {
+		if err = s.doMount(); err != nil {
+			return
+		}
 	}
 
 	s.cachePrepareTaskCh = make(chan cachePrepareTask, 1024)
@@ -123,6 +124,10 @@ func (c *CacheEngine) Stop() (err error) {
 	if err = c.lruCache.Close(); err != nil {
 		return err
 	}
+	if !c.enableTmpfs {
+		log.LogInfof("CacheEngine stopped, remove tmpfs dir: %s", c.dataPath)
+		return os.RemoveAll(c.dataPath)
+	}
 	time.Sleep(time.Second)
 	log.LogInfof("CacheEngine stopped, umount tmpfs: %v", c.dataPath)
 	return tmpfs.Umount(c.dataPath)
@@ -324,3 +329,7 @@ func GenCacheBlockKey(volume string, inode, offset uint64, version uint32) strin
 	u := strconv.FormatUint
 	return path.Join(volume, u(inode, 10)+"#"+u(offset, 10)+"#"+u(uint64(version), 10))
 }
+
+func enabledTmpfs() bool {
+	return os.Getenv(EnvDockerTmpfs) == ""
+}
diff --git a/flashnode/cachengine/engine_test.go b/flashnode/cachengine/engine_test.go
index 883d96b78..2d143f75d 100644
--- a/flashnode/cachengine/engine_test.go
+++ b/flashnode/cachengine/engine_test.go
@@ -52,6 +52,9 @@ func TestEngineNew(t *testing.T) {
 }
 
 func TestEngineOverFlow(t *testing.T) {
+	if !enabledTmpfs() {
+		t.Skip("disabled tmpfs")
+	}
 	ce, err := NewCacheEngine(testTmpFS, util.GB, 1.1, 1024, DefaultExpireTime, nil)
 	require.NoError(t, err)
 	defer func() { require.NoError(t, ce.Stop()) }()