tests fix

pandas/core/internals.py

@@ -371,7 +371,6 @@ def fillna(self, value, limit=None, inplace=False, downcast=None,
             else:
                 return self.copy()
 
-        original_value = value
         mask = isnull(self.values)
         if limit is not None:
             if not is_integer(limit):
@@ -398,10 +397,13 @@ def fillna(self, value, limit=None, inplace=False, downcast=None,
 
             # operate column-by-column
             def f(m, v, i):
-
+                print("value: {}".format(value))
+                print("block: {}".format(self))
                 # try again with a compatible block
-                block = self.coerce_to_target_dtype(original_value)
-                return block.fillna(original_value,
+                block = self.coerce_to_target_dtype(value)
+                print("coerced block: {}".format(block))
+
+                return block.fillna(value,
                                     limit=limit,
                                     inplace=inplace,
                                     downcast=False)