diff --git a/src/Language/Wasm/Validate.hs b/src/Language/Wasm/Validate.hs
index 520ab0e..70515f1 100644
--- a/src/Language/Wasm/Validate.hs
+++ b/src/Language/Wasm/Validate.hs
@@ -332,7 +332,7 @@ unify :: Arrow -> Arrow -> Checker Arrow
 unify (f `Arrow` []) (f' `Arrow` t') =
     return $ (reverse f' ++ f) `Arrow` t'
 unify (f `Arrow` t) ([] `Arrow` t') =
-    return $ f `Arrow` (t' ++ t)
+    return $ f `Arrow` (reverse t ++ t')
 unify (f `Arrow` (Val v':t)) ((Val v:f') `Arrow` t') =
     if v == v'
     then unify (f `Arrow` t) (f' `Arrow` t')
@@ -352,7 +352,7 @@ unify (f `Arrow` _) ((Any:_) `Arrow` t') =
     return $ f `Arrow` t'
 
 unify' :: Arrow -> Arrow -> Checker Arrow
-unify' (f `Arrow` t) (f' `Arrow` t') = unify (reverse f `Arrow` reverse t) (reverse f' `Arrow` reverse t')
+unify' (f `Arrow` t) (f' `Arrow` t') = unify (f `Arrow` reverse t) (reverse f' `Arrow` t')
 
 getExpressionType :: [Instruction] -> Checker Arrow
 getExpressionType instrs =
diff --git a/tests/Test.hs b/tests/Test.hs
index 24e2629..6a3eb4f 100644
--- a/tests/Test.hs
+++ b/tests/Test.hs
@@ -31,7 +31,7 @@ compile file = do
 main :: IO ()
 main = do
   files <- Directory.listDirectory "tests/samples"
-  -- let files = ["func.wast"]
+  -- let files = ["call.wast"]
   -- compile "fact.wast"
   syntaxTestCases <- (`mapM` files) $ \file -> do
     content <- LBS.readFile $ "tests/samples/" ++ file
diff --git a/tests/samples/if.wast b/tests/samples/if.wast
index a609345..1459045 100644
--- a/tests/samples/if.wast
+++ b/tests/samples/if.wast
@@ -24,7 +24,7 @@
       (else (call $dummy) (call $dummy) (i32.const 9))
     )
   )
-(;
+
   (func (export "nested") (param i32 i32) (result i32)
     (if (result i32) (get_local 0)
       (then
@@ -128,5 +128,4 @@
     )
     (get_local 1)
   )
-  ;)
 )
\ No newline at end of file