diff --git a/studio/backend/tests/test_safetensors_tool_loop.py b/studio/backend/tests/test_safetensors_tool_loop.py
index 6e450e6cbc..0b6869275a 100644
--- a/studio/backend/tests/test_safetensors_tool_loop.py
+++ b/studio/backend/tests/test_safetensors_tool_loop.py
@@ -100,7 +100,7 @@ class TestParser:
         assert json.loads(result[0]["function"]["arguments"]) == {"command": "echo {foo:bar}"}
 
     def test_gemma_native_tool_call_bare_string_values(self):
-        text = '<|tool_call>call:get_weather{location:Tokyo,unit:celsius}<tool_call|>'
+        text = "<|tool_call>call:get_weather{location:Tokyo,unit:celsius}<tool_call|>"
         result = parse_tool_calls_from_text(text)
         assert len(result) == 1
         assert json.loads(result[0]["function"]["arguments"]) == {
diff --git a/studio/backend/tests/test_tool_call_parser_strict.py b/studio/backend/tests/test_tool_call_parser_strict.py
index 61c625f6fe..931d8a705d 100644
--- a/studio/backend/tests/test_tool_call_parser_strict.py
+++ b/studio/backend/tests/test_tool_call_parser_strict.py
@@ -141,7 +141,9 @@ class TestGemmaNativeStyle:
 
     def test_bare_unquoted_string_values_are_accepted(self):
         # Gemma can emit enum/string args unquoted; bare JSON scalars stay typed.
-        text = '<|tool_call>call:get_weather{location:Tokyo,unit:celsius,days:3,live:true}<tool_call|>'
+        text = (
+            "<|tool_call>call:get_weather{location:Tokyo,unit:celsius,days:3,live:true}<tool_call|>"
+        )
         calls = parse_tool_calls_from_text(text, allow_incomplete = False)
         assert len(calls) == 1
         assert json.loads(calls[0]["function"]["arguments"]) == {