2 files changed, 5 insertions, 5 deletions
diff --git a/activerecord/lib/active_record/coders/yaml_column.rb b/activerecord/lib/active_record/coders/yaml_column.rb
index 2136da43fe..9c52a31b95 100644
--- a/activerecord/lib/active_record/coders/yaml_column.rb
+++ b/activerecord/lib/active_record/coders/yaml_column.rb
@@ -14,7 +14,7 @@ module ActiveRecord
       def dump(obj)
         return if obj.nil?
 
-        assert_valid_value(obj)
+        assert_valid_value(obj, action: "dump")
         YAML.dump obj
       end
 
@@ -23,16 +23,16 @@ module ActiveRecord
         return yaml unless yaml.is_a?(String) && /^---/.match?(yaml)
         obj = YAML.load(yaml)
 
-        assert_valid_value(obj)
+        assert_valid_value(obj, action: "load")
         obj ||= object_class.new if object_class != Object
 
         obj
       end
 
-      def assert_valid_value(obj)
+      def assert_valid_value(obj, action:)
         unless obj.nil? || obj.is_a?(object_class)
           raise SerializationTypeMismatch,
-            "Attribute `#{@attr_name}` was supposed to be a #{object_class}, but was a #{obj.class}. -- #{obj.inspect}"
+            "can't #{action} `#{@attr_name}`: was supposed to be a #{object_class}, but was a #{obj.class}. -- #{obj.inspect}"
         end
       end
 
diff --git a/activerecord/lib/active_record/type/serialized.rb b/activerecord/lib/active_record/type/serialized.rb
index ac9134bfcb..6af05c1860 100644
--- a/activerecord/lib/active_record/type/serialized.rb
+++ b/activerecord/lib/active_record/type/serialized.rb
@@ -43,7 +43,7 @@ module ActiveRecord
 
       def assert_valid_value(value)
         if coder.respond_to?(:assert_valid_value)
-          coder.assert_valid_value(value)
+          coder.assert_valid_value(value, action: "serialize")
         end
       end