diff --git a/tools/test_apps/system/panic/app_test.py b/tools/test_apps/system/panic/app_test.py
index da2c3266cf..e12d393f3b 100644
--- a/tools/test_apps/system/panic/app_test.py
+++ b/tools/test_apps/system/panic/app_test.py
@@ -296,32 +296,32 @@ def test_gdbstub_abort(env, _extra_data):
 
 @panic_test()
 def test_panic_ub(env, _extra_data):
-    test.ub_inner(env, "panic")
+    test.ub_inner(env, 'panic')
 
 
 @panic_test()
 def test_coredump_ub_uart_elf_crc(env, _extra_data):
-    test.ub_inner(env, "coredump_uart_elf_crc")
+    test.ub_inner(env, 'coredump_uart_elf_crc')
 
 
 @panic_test()
 def test_coredump_ub_uart_bin_crc(env, _extra_data):
-    test.ub_inner(env, "coredump_uart_bin_crc")
+    test.ub_inner(env, 'coredump_uart_bin_crc')
 
 
 @panic_test()
 def test_coredump_ub_flash_elf_sha(env, _extra_data):
-    test.ub_inner(env, "coredump_flash_elf_sha")
+    test.ub_inner(env, 'coredump_flash_elf_sha')
 
 
 @panic_test()
 def test_coredump_ub_flash_bin_crc(env, _extra_data):
-    test.ub_inner(env, "coredump_flash_bin_crc")
+    test.ub_inner(env, 'coredump_flash_bin_crc')
 
 
 @panic_test()
 def test_gdbstub_ub(env, _extra_data):
-    test.ub_inner(env, "gdbstub")
+    test.ub_inner(env, 'gdbstub')
 
 
 if __name__ == '__main__':
diff --git a/tools/test_apps/system/panic/panic_tests.py b/tools/test_apps/system/panic/panic_tests.py
index d8db3725f5..bdf6b4941c 100644
--- a/tools/test_apps/system/panic/panic_tests.py
+++ b/tools/test_apps/system/panic/panic_tests.py
@@ -150,12 +150,12 @@ def instr_fetch_prohibited_inner(env, test_name):
 
 
 def ub_inner(env, test_name):
-    with get_dut(env, test_name, "test_ub") as dut:
-        dut.expect(re.compile(r"Undefined behavior of type out_of_bounds"))
+    with get_dut(env, test_name, 'test_ub') as dut:
+        dut.expect(re.compile(r'Undefined behavior of type out_of_bounds'))
         dut.expect_backtrace()
         dut.expect_elf_sha256()
-        dut.expect_none("Guru Meditation", "Re-entered core dump")
+        dut.expect_none('Guru Meditation', 'Re-entered core dump')
         test_common(dut, test_name, expected_backtrace=[
             # Backtrace interrupted when abort is called, IDF-842
-            "panic_abort", "esp_system_abort"
+            'panic_abort', 'esp_system_abort'
         ])