diff --git a/board/jungle/__init__.py b/board/jungle/__init__.py
index 87cfd678..77a6e3c7 100644
--- a/board/jungle/__init__.py
+++ b/board/jungle/__init__.py
@@ -83,11 +83,10 @@ class PandaJungle(Panda):
       return McuType.H7
     raise ValueError(f"unknown HW type: {hw_type}")
 
-  def up_to_date(self) -> bool:
-    current = self.get_signature()
-    fn = os.path.join(FW_PATH, self.get_mcu_type().config.app_fn.replace("panda", "panda_jungle"))
-    expected = Panda.get_signature_from_firmware(fn)
-    return (current == expected)
+  def up_to_date(self, fn=None) -> bool:
+    if fn is None:
+      fn = os.path.join(FW_PATH, self.get_mcu_type().config.app_fn.replace("panda", "panda_jungle"))
+    return super().up_to_date(fn=fn)
 
   # ******************* health *******************
 
diff --git a/python/__init__.py b/python/__init__.py
index bfa37684..c073c78a 100644
--- a/python/__init__.py
+++ b/python/__init__.py
@@ -492,6 +492,10 @@ class Panda:
       pass
 
   def flash(self, fn=None, code=None, reconnect=True):
+    if self.up_to_date(fn=fn):
+      logging.debug("flash: already up to date")
+      return
+
     if not fn:
       fn = os.path.join(FW_PATH, self._mcu_type.config.app_fn)
     assert os.path.isfile(fn)
@@ -556,9 +560,10 @@ class Panda:
       serials = Panda.list()
     return True
 
-  def up_to_date(self) -> bool:
+  def up_to_date(self, fn=None) -> bool:
     current = self.get_signature()
-    fn = os.path.join(FW_PATH, self.get_mcu_type().config.app_fn)
+    if fn is None:
+      fn = os.path.join(FW_PATH, self.get_mcu_type().config.app_fn)
     expected = Panda.get_signature_from_firmware(fn)
     return (current == expected)