diff --git a/test/autotest/testcases/toolchain/performance/TestWorkerBasicFuncWithGPSOff.py b/test/autotest/testcases/toolchain/performance/TestWorkerBasicFuncWithGPSOff.py
index 354b55e721b01aad5d731bbc193958d522b44802..e96d68a33ae8ec8254f82250000a4b8072610a4b 100644
--- a/test/autotest/testcases/toolchain/performance/TestWorkerBasicFuncWithGPSOff.py
+++ b/test/autotest/testcases/toolchain/performance/TestWorkerBasicFuncWithGPSOff.py
@@ -263,7 +263,7 @@ class TestWorkerBasicFuncWithGPSOff(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", worker_thread, params)
@@ -770,7 +770,7 @@ class TestWorkerBasicFuncWithGPSOff(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", worker_thread, params)
diff --git a/test/autotest/testcases/toolchain/performance/TestWorkerBasicFuncWithGPSOn.py b/test/autotest/testcases/toolchain/performance/TestWorkerBasicFuncWithGPSOn.py
index a2e8056a16fdf102c90cd486fda262a550bbbac5..776a176c0b8c697b3f6e9d5c718ba3f99dbe94b6 100644
--- a/test/autotest/testcases/toolchain/performance/TestWorkerBasicFuncWithGPSOn.py
+++ b/test/autotest/testcases/toolchain/performance/TestWorkerBasicFuncWithGPSOn.py
@@ -263,7 +263,7 @@ class TestWorkerBasicFuncWithGPSOn(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", worker_thread, params)
@@ -763,7 +763,7 @@ class TestWorkerBasicFuncWithGPSOn(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", worker_thread, params)