diff --git a/pytest_mypy_plugins/item.py b/pytest_mypy_plugins/item.py
index 957d4fa..8f5c4cc 100644
--- a/pytest_mypy_plugins/item.py
+++ b/pytest_mypy_plugins/item.py
@@ -394,7 +394,7 @@ def execute_extension_hook(self) -> None:
 
     def runtest(self) -> None:
         try:
-            temp_dir = tempfile.TemporaryDirectory(prefix="pytest-mypy-", dir=self.root_directory)
+            temp_dir = tempfile.TemporaryDirectory(prefix=f"pytest-mypy-{self.name}-", dir=self.root_directory)
 
         except (FileNotFoundError, PermissionError, NotADirectoryError) as e:
             raise TypecheckAssertionError(