diff --git a/src/saleyo/mixin.py b/src/saleyo/mixin.py
index fc2a810..5388f17 100644
--- a/src/saleyo/mixin.py
+++ b/src/saleyo/mixin.py
@@ -20,7 +20,7 @@ class Mixin:
 
     def __init__(
         self,
-        target: IterableOrSingle,
+        target: IterableOrSingle[Type[Any]],
         toolchain: ToolChain = ToolChain(),
         reverse_level: bool = False,
     ) -> None:
@@ -120,9 +120,11 @@ def apply_from_class(self, mixin: T) -> T:
                 member.mixin(target=target, toolchain=self.toolchain)
         return mixin
 
-    def apply_from_operations(self, operations: Iterable[MixinOperation]) -> None:
+    def apply_from_operations(
+        self, operations: IterableOrSingle[MixinOperation]
+    ) -> None:
         """
-        Use operations from a `Iterable[MixinOperation]` and apply to target.
+        Use operations from a `IterableOrSingle[MixinOperation]` and apply to target.
 
         Always used to mixin class manually.
 
@@ -133,7 +135,7 @@ def apply_from_operations(self, operations: Iterable[MixinOperation]) -> None:
         mixin.apply_from_operations([op1, op2])
         ```
         """
-        for operation in operations:
+        for operation in operations if operations is Iterable else [operations]:
             for target in self.target:
                 operation.mixin(target=target, toolchain=self.toolchain)
 
diff --git a/tests/gc_test.py b/tests/gc_test.py
index d8e6529..a244f24 100644
--- a/tests/gc_test.py
+++ b/tests/gc_test.py
@@ -4,9 +4,10 @@
 @Mixin(target=str, toolchain=GCToolChain)
 class MixinStr:
     @Pre.configure(target_name="format")
-    def pre_format(self, *args) -> Arguments[...]:
+    def pre_format(self, *args, **kwargs) -> Arguments[...]:
         print(f"input args: {args}")
-        return Arguments(self, "python")
+        print(f"input kwargs: {kwargs}")
+        return Arguments(self, *args, **kwargs)
 
 
-print("hello world {}".format("saleyo"))
+print("hello world {},{}".format("saleyo", "some"))
diff --git a/tests/modify_test.py b/tests/modify_test.py
index 4de6e2a..139c9c6 100644
--- a/tests/modify_test.py
+++ b/tests/modify_test.py
@@ -1,6 +1,8 @@
-from saleyo import Alias, GCToolChain
+from saleyo import Alias, GCToolChain, Mixin
 
-Alias("upper", "do_upper").mixin(str, GCToolChain)
+alias = Alias("upper", "do_upper")
+
+Mixin(str, GCToolChain).apply_from_operations(alias)
 
 print("Hello Saleyo!".do_upper())
 print("Hello Saleyo!".upper())