diff --git a/core/src/trezor/utils.py b/core/src/trezor/utils.py
index ab8f4ff5c..0263fa3ed 100644
--- a/core/src/trezor/utils.py
+++ b/core/src/trezor/utils.py
@@ -304,29 +304,20 @@ class BufferReader:
 
 def obj_eq(self: Any, __o: Any) -> bool:
     """
-    Compares object contents, supports __slots__.
+    Compares object contents.
     """
     if self.__class__ is not __o.__class__:
         return False
-    if not hasattr(self, "__slots__"):
-        return self.__dict__ == __o.__dict__
-    if self.__slots__ is not __o.__slots__:
-        return False
-    for slot in self.__slots__:
-        if getattr(self, slot, None) != getattr(__o, slot, None):
-            return False
-    return True
+    assert not hasattr(self, "__slots__")
+    return self.__dict__ == __o.__dict__
 
 
 def obj_repr(self: Any) -> str:
     """
-    Returns a string representation of object, supports __slots__.
+    Returns a string representation of object.
     """
-    if hasattr(self, "__slots__"):
-        d = {attr: getattr(self, attr, None) for attr in self.__slots__}
-    else:
-        d = self.__dict__
-    return f"<{self.__class__.__name__}: {d}>"
+    assert not hasattr(self, "__slots__")
+    return f"<{self.__class__.__name__}: {self.__dict__}>"
 
 
 def truncate_utf8(string: str, max_bytes: int) -> str: