diff --git a/accounts/keystore/account_cache_test.go b/accounts/keystore/account_cache_test.go
index 569858c6f6..e579b64e7d 100644
--- a/accounts/keystore/account_cache_test.go
+++ b/accounts/keystore/account_cache_test.go
@@ -95,8 +95,7 @@ func TestWatchNoDir(t *testing.T) {
 	t.Parallel()
 
 	// Create ks but not the directory that it watches.
-	rand.Seed(time.Now().UnixNano())
-	dir := filepath.Join(os.TempDir(), fmt.Sprintf("eth-keystore-watch-test-%d-%d", os.Getpid(), rand.Int()))
+	dir := filepath.Join(t.TempDir(), fmt.Sprintf("eth-keystore-watchnodir-test-%d-%d", os.Getpid(), rand.Int()))
 	ks := NewKeyStore(dir, LightScryptN, LightScryptP)
 
 	list := ks.Accounts()
@@ -107,7 +106,6 @@ func TestWatchNoDir(t *testing.T) {
 
 	// Create the directory and copy a key file into it.
 	os.MkdirAll(dir, 0700)
-	defer os.RemoveAll(dir)
 	file := filepath.Join(dir, "aaa")
 	if err := cp.CopyFile(file, cachetestAccounts[0].URL.Path); err != nil {
 		t.Fatal(err)
diff --git a/core/rawdb/freezer_meta_test.go b/core/rawdb/freezer_meta_test.go
index 1c8baa7e24..a5b85501d9 100644
--- a/core/rawdb/freezer_meta_test.go
+++ b/core/rawdb/freezer_meta_test.go
@@ -22,10 +22,11 @@ import (
 )
 
 func TestReadWriteFreezerTableMeta(t *testing.T) {
-	f, err := os.CreateTemp(os.TempDir(), "*")
+	f, err := os.CreateTemp(t.TempDir(), "*")
 	if err != nil {
 		t.Fatalf("Failed to create file %v", err)
 	}
+	defer f.Close()
 	err = writeMetadata(f, newMetadata(100))
 	if err != nil {
 		t.Fatalf("Failed to write metadata %v", err)
@@ -43,10 +44,11 @@ func TestReadWriteFreezerTableMeta(t *testing.T) {
 }
 
 func TestInitializeFreezerTableMeta(t *testing.T) {
-	f, err := os.CreateTemp(os.TempDir(), "*")
+	f, err := os.CreateTemp(t.TempDir(), "*")
 	if err != nil {
 		t.Fatalf("Failed to create file %v", err)
 	}
+	defer f.Close()
 	meta, err := loadMetadata(f, uint64(100))
 	if err != nil {
 		t.Fatalf("Failed to read metadata %v", err)