diff --git a/tests/army/test.py b/tests/army/test.py
index 5827657106..56b868c7ae 100644
--- a/tests/army/test.py
+++ b/tests/army/test.py
@@ -369,8 +369,7 @@ if __name__ == "__main__":
         updateCfgDictStr = ''
         # adapter_cfg_dict_str = ''
         if is_test_framework:
-            moduleName = fileName.replace(".py", "").replace(os.sep, ".")
-            uModule = importlib.import_module(moduleName)
+            uModule = dynamicLoadModule(fileName)
             try:
                 case_class = getattr(uModule, get_local_classes(uModule)[-1])
                 ucase = case_class()
@@ -542,8 +541,7 @@ if __name__ == "__main__":
         except:
             pass
         if is_test_framework:
-            moduleName = fileName.replace(".py", "").replace("/", ".")
-            uModule = importlib.import_module(moduleName)
+            uModule = dynamicLoadModule(fileName)
             try:
                 case_class = getattr(uModule, get_local_classes(uModule)[-1])
                 ucase = case_class()
diff --git a/tests/develop-test/test.py b/tests/develop-test/test.py
index c0a090aaa5..76d5732e80 100644
--- a/tests/develop-test/test.py
+++ b/tests/develop-test/test.py
@@ -22,6 +22,9 @@ import json
 import platform
 import socket
 import threading
+import inspect
+import importlib
+import os
 
 import toml
 
@@ -56,6 +59,17 @@ def checkRunTimeError():
         if hwnd:
             os.system("TASKKILL /F /IM taosd.exe")
 
+def get_local_classes(module):
+    classes = []
+    for name, obj in inspect.getmembers(module, inspect.isclass):
+        if inspect.getmodule(obj) == module:
+            classes.append(name)
+    return classes
+
+def dynamicLoadModule(fileName):
+    moduleName = fileName.replace(".py", "").replace(os.sep, ".")
+    return importlib.import_module(moduleName, package='..')
+
 
 if __name__ == "__main__":
 
@@ -295,8 +309,7 @@ if __name__ == "__main__":
         updateCfgDictStr = ""
         # adapter_cfg_dict_str = ''
         if is_test_framework:
-            moduleName = fileName.replace(".py", "").replace(os.sep, ".")
-            uModule = importlib.import_module(moduleName)
+            uModule = dynamicLoadModule(fileName)
             try:
                 case_class = getattr(uModule, get_local_classes(uModule)[-1])
                 ucase = case_class()
@@ -435,8 +448,7 @@ if __name__ == "__main__":
         except:
             pass
         if is_test_framework:
-            moduleName = fileName.replace(".py", "").replace("/", ".")
-            uModule = importlib.import_module(moduleName)
+            uModule = dynamicLoadModule(fileName)
             try:
                 case_class = getattr(uModule, get_local_classes(uModule)[-1])
                 ucase = case_class()
diff --git a/tests/pytest/test.py b/tests/pytest/test.py
index eac9d9ea77..9d0e8651b4 100644
--- a/tests/pytest/test.py
+++ b/tests/pytest/test.py
@@ -147,8 +147,7 @@ if __name__ == "__main__":
             except:
                 pass
             if is_test_framework:
-                moduleName = fileName.replace(".py", "").replace(os.sep, ".")
-                uModule = importlib.import_module(moduleName)
+                uModule = dynamicLoadModule(fileName)
                 try:
                     ucase = uModule.TDTestCase()
                     tdDnodes.deploy(1,ucase.updatecfgDict)
@@ -181,8 +180,7 @@ if __name__ == "__main__":
         except:
             pass
         if is_test_framework:
-            moduleName = fileName.replace(".py", "").replace("/", ".")
-            uModule = importlib.import_module(moduleName)
+            uModule = dynamicLoadModule(fileName)
             try:
                 ucase = uModule.TDTestCase()
                 tdDnodes.deploy(1,ucase.updatecfgDict)
diff --git a/tests/pytest/util/cases.py b/tests/pytest/util/cases.py
index 9a76e14790..48f73c50f1 100644
--- a/tests/pytest/util/cases.py
+++ b/tests/pytest/util/cases.py
@@ -63,7 +63,9 @@ class TDCases:
         runNum = 0
         for tmp in self.linuxCases:
             if tmp.name.find(fileName) != -1:
-                case = testModule.TDTestCase()
+                # get the last class name as the test case class name
+                case_class = getattr(testModule, self.get_local_classes(testModule)[0])
+                case = case_class()
                 case.init(conn)
                 case.run()
                 case.stop()
@@ -98,7 +100,9 @@ class TDCases:
         runNum = 0
         for tmp in self.windowsCases:
             if tmp.name.find(fileName) != -1:
-                case = testModule.TDTestCase()
+                # get the last class name as the test case class name
+                case_class = getattr(testModule, self.get_local_classes(testModule)[-1])
+                case = case_class()
                 case.init(conn)
                 case.run()
                 case.stop()
diff --git a/tests/system-test/test.py b/tests/system-test/test.py
index 87febd1bf2..bf66b6a765 100644
--- a/tests/system-test/test.py
+++ b/tests/system-test/test.py
@@ -24,6 +24,7 @@ import platform
 import socket
 import threading
 import importlib
+import inspect
 print(f"Python version: {sys.version}")
 print(f"Version info: {sys.version_info}")
 
@@ -58,6 +59,17 @@ def checkRunTimeError():
         if hwnd:
             os.system("TASKKILL /F /IM taosd.exe")
 
+def get_local_classes(module):
+    classes = []
+    for name, obj in inspect.getmembers(module, inspect.isclass):
+        if inspect.getmodule(obj) == module:
+            classes.append(name)
+    return classes
+
+def dynamicLoadModule(fileName):
+    moduleName = fileName.replace(".py", "").replace(os.sep, ".")
+    return importlib.import_module(moduleName, package='..')
+
 #
 # run case on previous cluster
 #
@@ -69,7 +81,6 @@ def runOnPreviousCluster(host, config, fileName):
     if platform.system().lower() == 'windows':
         sep = os.sep
     uModule = dynamicLoadModule(fileName)
-    
     case_class = getattr(uModule, get_local_classes(uModule)[-1])
     case = case_class()    
 
@@ -351,8 +362,7 @@ if __name__ == "__main__":
         updateCfgDictStr = ''
         # adapter_cfg_dict_str = ''
         if is_test_framework:
-            moduleName = fileName.replace(".py", "").replace(os.sep, ".")
-            uModule = importlib.import_module(moduleName)
+            uModule = dynamicLoadModule(fileName)
             try:
                 case_class = getattr(uModule, get_local_classes(uModule)[-1])
                 ucase = case_class()
@@ -524,8 +534,7 @@ if __name__ == "__main__":
         except:
             pass
         if is_test_framework:
-            moduleName = fileName.replace(".py", "").replace("/", ".")
-            uModule = importlib.import_module(moduleName)
+            uModule = dynamicLoadModule(fileName)
             try:
                 case_class = getattr(uModule, get_local_classes(uModule)[-1])
                 ucase = case_class()                
diff --git a/tests/test_new/test.py b/tests/test_new/test.py
index 87febd1bf2..bf66b6a765 100644
--- a/tests/test_new/test.py
+++ b/tests/test_new/test.py
@@ -24,6 +24,7 @@ import platform
 import socket
 import threading
 import importlib
+import inspect
 print(f"Python version: {sys.version}")
 print(f"Version info: {sys.version_info}")
 
@@ -58,6 +59,17 @@ def checkRunTimeError():
         if hwnd:
             os.system("TASKKILL /F /IM taosd.exe")
 
+def get_local_classes(module):
+    classes = []
+    for name, obj in inspect.getmembers(module, inspect.isclass):
+        if inspect.getmodule(obj) == module:
+            classes.append(name)
+    return classes
+
+def dynamicLoadModule(fileName):
+    moduleName = fileName.replace(".py", "").replace(os.sep, ".")
+    return importlib.import_module(moduleName, package='..')
+
 #
 # run case on previous cluster
 #
@@ -69,7 +81,6 @@ def runOnPreviousCluster(host, config, fileName):
     if platform.system().lower() == 'windows':
         sep = os.sep
     uModule = dynamicLoadModule(fileName)
-    
     case_class = getattr(uModule, get_local_classes(uModule)[-1])
     case = case_class()    
 
@@ -351,8 +362,7 @@ if __name__ == "__main__":
         updateCfgDictStr = ''
         # adapter_cfg_dict_str = ''
         if is_test_framework:
-            moduleName = fileName.replace(".py", "").replace(os.sep, ".")
-            uModule = importlib.import_module(moduleName)
+            uModule = dynamicLoadModule(fileName)
             try:
                 case_class = getattr(uModule, get_local_classes(uModule)[-1])
                 ucase = case_class()
@@ -524,8 +534,7 @@ if __name__ == "__main__":
         except:
             pass
         if is_test_framework:
-            moduleName = fileName.replace(".py", "").replace("/", ".")
-            uModule = importlib.import_module(moduleName)
+            uModule = dynamicLoadModule(fileName)
             try:
                 case_class = getattr(uModule, get_local_classes(uModule)[-1])
                 ucase = case_class()