diff --git a/src/util/src/tcache.c b/src/util/src/tcache.c
index 69b3741e13..b4cf2b6658 100644
--- a/src/util/src/tcache.c
+++ b/src/util/src/tcache.c
@@ -537,7 +537,8 @@ void taosCacheCleanup(SCacheObj *pCacheObj) {
   pCacheObj->deleting = 1;
 
   // wait for the refresh thread quit before destroying the cache object.
-  while(atomic_load_8(&pCacheObj->deleting) != 0) {
+  // But in the dll, the child thread will be killed before atexit takes effect.So here we only wait for 2 seconds.
+  for (int i = 0; i < 40&&atomic_load_8(&pCacheObj->deleting) != 0; i++) {
     taosMsleep(50);
   }
 
diff --git a/tests/pytest/util/dnodes-default.py b/tests/pytest/util/dnodes-default.py
index 085e083149..8da36f3074 100644
--- a/tests/pytest/util/dnodes-default.py
+++ b/tests/pytest/util/dnodes-default.py
@@ -60,7 +60,7 @@ class TDSimClient:
         self.cfgDict.update({option: value})
 
     def cfg(self, option, value):
-        cmd = "echo '%s %s' >> %s" % (option, value, self.cfgPath)
+        cmd = "echo %s %s >> %s" % (option, value, self.cfgPath)
         if os.system(cmd) != 0:
             tdLog.exit(cmd)
 
@@ -320,7 +320,7 @@ class TDDnode:
             tdLog.exit(cmd)
 
     def cfg(self, option, value):
-        cmd = "echo '%s %s' >> %s" % (option, value, self.cfgPath)
+        cmd = "echo %s %s >> %s" % (option, value, self.cfgPath)
         if os.system(cmd) != 0:
             tdLog.exit(cmd)
 
diff --git a/tests/pytest/util/dnodes-no-random-fail.py b/tests/pytest/util/dnodes-no-random-fail.py
index 2627575e61..a973f8da52 100644
--- a/tests/pytest/util/dnodes-no-random-fail.py
+++ b/tests/pytest/util/dnodes-no-random-fail.py
@@ -58,7 +58,7 @@ class TDSimClient:
         self.cfgDict.update({option: value})
 
     def cfg(self, option, value):
-        cmd = "echo '%s %s' >> %s" % (option, value, self.cfgPath)
+        cmd = "echo %s %s >> %s" % (option, value, self.cfgPath)
         if os.system(cmd) != 0:
             tdLog.exit(cmd)
 
@@ -318,7 +318,7 @@ class TDDnode:
             tdLog.exit(cmd)
 
     def cfg(self, option, value):
-        cmd = "echo '%s %s' >> %s" % (option, value, self.cfgPath)
+        cmd = "echo %s %s >> %s" % (option, value, self.cfgPath)
         if os.system(cmd) != 0:
             tdLog.exit(cmd)
 
diff --git a/tests/pytest/util/dnodes-random-fail.py b/tests/pytest/util/dnodes-random-fail.py
index 4f4cdcc0d0..7cadca64a3 100644
--- a/tests/pytest/util/dnodes-random-fail.py
+++ b/tests/pytest/util/dnodes-random-fail.py
@@ -58,7 +58,7 @@ class TDSimClient:
         self.cfgDict.update({option: value})
 
     def cfg(self, option, value):
-        cmd = "echo '%s %s' >> %s" % (option, value, self.cfgPath)
+        cmd = "echo %s %s >> %s" % (option, value, self.cfgPath)
         if os.system(cmd) != 0:
             tdLog.exit(cmd)
 
@@ -318,7 +318,7 @@ class TDDnode:
             tdLog.exit(cmd)
 
     def cfg(self, option, value):
-        cmd = "echo '%s %s' >> %s" % (option, value, self.cfgPath)
+        cmd = "echo %s %s >> %s" % (option, value, self.cfgPath)
         if os.system(cmd) != 0:
             tdLog.exit(cmd)
 
diff --git a/tests/pytest/util/dnodes.py b/tests/pytest/util/dnodes.py
index b176035b57..2abb8f5ee7 100644
--- a/tests/pytest/util/dnodes.py
+++ b/tests/pytest/util/dnodes.py
@@ -14,6 +14,7 @@
 import sys
 import os
 import os.path
+import platform
 import subprocess
 from time import sleep
 from util.log import *
@@ -58,7 +59,7 @@ class TDSimClient:
         self.cfgDict.update({option: value})
 
     def cfg(self, option, value):
-        cmd = "echo '%s %s' >> %s" % (option, value, self.cfgPath)
+        cmd = "echo %s %s >> %s" % (option, value, self.cfgPath)
         if os.system(cmd) != 0:
             tdLog.exit(cmd)
 
@@ -243,7 +244,7 @@ class TDDnode:
             projPath = selfPath[:selfPath.find("tests")]
 
         for root, dirs, files in os.walk(projPath):
-            if ("taosd" in files):
+            if (("taosd") in files):
                 rootRealPath = os.path.dirname(os.path.realpath(root))
                 if ("packaging" not in rootRealPath):
                     buildPath = root[:len(root)-len("/build/bin")]
@@ -401,7 +402,7 @@ class TDDnode:
             tdLog.exit(cmd)
 
     def cfg(self, option, value):
-        cmd = "echo '%s %s' >> %s" % (option, value, self.cfgPath)
+        cmd = "echo %s %s >> %s" % (option, value, self.cfgPath)
         if os.system(cmd) != 0:
             tdLog.exit(cmd)