diff --git a/test/autotest/testcases/toolchain/performance/TestMainBasicFuncWithGPSOff.py b/test/autotest/testcases/toolchain/performance/TestMainBasicFuncWithGPSOff.py
index ee7c3333997ef25d150913fce88062bd8706c1d2..447c705d49be95728ded584cbd372a3a41ecbc21 100644
--- a/test/autotest/testcases/toolchain/performance/TestMainBasicFuncWithGPSOff.py
+++ b/test/autotest/testcases/toolchain/performance/TestMainBasicFuncWithGPSOff.py
@@ -128,7 +128,7 @@ class TestMainBasicFuncWithGPSOff(TestCase):
         ################################################################################################################
         symbolicBreakpoints = [debugger.SymbolicBreakpoint(functionName='testDebug')]
         for i in range(1, 51):
-            symbolicBreakpoints.append(debugger.SymbolicBreakpoint(functionName='testDebug' + str(i)))
+            symbolicBreakpoints.append(debugger.SymbolicBreakpoint(functionName=f'testDebug{i}'))
         params = debugger.SymbolicBreakpoints(symbolicBreakpoints)
         start_time = datetime.now()
         await self.debugger_impl.send("Debugger.setSymbolicBreakpoints", main_thread, params)
@@ -646,7 +646,7 @@ class TestMainBasicFuncWithGPSOff(TestCase):
         ################################################################################################################
         symbolicBreakpoints = [debugger.SymbolicBreakpoint(functionName='testDebug')]
         for i in range(1, 51):
-            symbolicBreakpoints.append(debugger.SymbolicBreakpoint(functionName='testDebug' + str(i)))
+            symbolicBreakpoints.append(debugger.SymbolicBreakpoint(functionName=f'testDebug{i}'))
         params = debugger.SymbolicBreakpoints(symbolicBreakpoints)
         start_time = datetime.now()
         await self.debugger_impl.send("Debugger.removeSymbolicBreakpoints", main_thread, params)
diff --git a/test/autotest/testcases/toolchain/performance/TestMainBasicFuncWithGPSOn.py b/test/autotest/testcases/toolchain/performance/TestMainBasicFuncWithGPSOn.py
index 17d3cc37537f6f4a19697e062f464f2c58dd2cfd..541f08a988ecd0cbdb2f0f9ceecde534ad29d4ec 100644
--- a/test/autotest/testcases/toolchain/performance/TestMainBasicFuncWithGPSOn.py
+++ b/test/autotest/testcases/toolchain/performance/TestMainBasicFuncWithGPSOn.py
@@ -128,7 +128,7 @@ class TestMainBasicFuncWithGPSOn(TestCase):
         ################################################################################################################
         symbolicBreakpoints = [debugger.SymbolicBreakpoint(functionName='testDropFrame')]
         for i in range(1, 51):
-            symbolicBreakpoints.append(debugger.SymbolicBreakpoint(functionName='testDebug' + str(i)))
+            symbolicBreakpoints.append(debugger.SymbolicBreakpoint(functionName=f'testDebug{i}'))
         params = debugger.SymbolicBreakpoints(symbolicBreakpoints)
         start_time = datetime.now()
         await self.debugger_impl.send("Debugger.setSymbolicBreakpoints", main_thread, params)
@@ -639,7 +639,7 @@ class TestMainBasicFuncWithGPSOn(TestCase):
         ################################################################################################################
         symbolicBreakpoints = [debugger.SymbolicBreakpoint(functionName='testDropFrame')]
         for i in range(1, 51):
-            symbolicBreakpoints.append(debugger.SymbolicBreakpoint(functionName='testDebug' + str(i)))
+            symbolicBreakpoints.append(debugger.SymbolicBreakpoint(functionName=f'testDebug{i}'))
         params = debugger.SymbolicBreakpoints(symbolicBreakpoints)
         start_time = datetime.now()
         await self.debugger_impl.send("Debugger.removeSymbolicBreakpoints", main_thread, params)