diff --git a/crates/erg_common/serialize.rs b/crates/erg_common/serialize.rs
index d95eb8ade..d14d9bd4d 100644
--- a/crates/erg_common/serialize.rs
+++ b/crates/erg_common/serialize.rs
@@ -33,6 +33,7 @@ pub const fn get_ver_from_magic_num(magic_num: u32) -> PythonVersion {
         3420..=3425 => PythonVersion::new(3, Some(9), Some(0)),
         3430..=3439 => PythonVersion::new(3, Some(10), Some(0)), // main: 3439
         3495 => PythonVersion::new(3, Some(11), Some(0)),
+        3531 => PythonVersion::new(3, Some(12), Some(0)),
         _ => panic!("unknown magic number"),
     }
 }
diff --git a/crates/erg_compiler/codegen.rs b/crates/erg_compiler/codegen.rs
index e73a0e472..64fc3bbe2 100644
--- a/crates/erg_compiler/codegen.rs
+++ b/crates/erg_compiler/codegen.rs
@@ -775,7 +775,7 @@ impl PyCodeGenerator {
         let kind = RegisterNameKind::from_ident(&ident);
         let escaped = escape_ident(ident);
         match &escaped[..] {
-            "if__" | "for__" | "while__" | "with__" | "discard__" => {
+            "if__" | "for__" | "while__" | "with__" | "discard__" | "assert__" => {
                 self.load_control();
             }
             "int__" | "nat__" | "str__" | "float__" => {
diff --git a/crates/erg_compiler/context/initialize/funcs.rs b/crates/erg_compiler/context/initialize/funcs.rs
index 303aaecf2..02543c7d4 100644
--- a/crates/erg_compiler/context/initialize/funcs.rs
+++ b/crates/erg_compiler/context/initialize/funcs.rs
@@ -292,7 +292,8 @@ impl Context {
         self.register_py_builtin(FUNC_ARRAY, t_array, Some(FUNC_LIST), 215);
         self.register_py_builtin(FUNC_ASCII, t_ascii, Some(FUNC_ASCII), 53);
         // Leave as `Const`, as it may negatively affect assert casting.
-        self.register_builtin_erg_impl(FUNC_ASSERT, t_assert, Const, vis.clone());
+        let name = if PYTHON_MODE { "assert" } else { "assert__" };
+        self.register_builtin_py_impl(FUNC_ASSERT, t_assert, Const, vis.clone(), Some(name));
         self.register_builtin_py_impl(FUNC_BIN, t_bin, Immutable, vis.clone(), Some(FUNC_BIN));
         self.register_builtin_py_impl(
             FUNC_BYTES,
diff --git a/crates/erg_compiler/lib/std/exception.er b/crates/erg_compiler/lib/std/exception.er
index 0c9ced34d..6ae183467 100644
--- a/crates/erg_compiler/lib/std/exception.er
+++ b/crates/erg_compiler/lib/std/exception.er
@@ -3,15 +3,16 @@ unsound = import "unsound"
 # TODO: exception: Exception
 unsound.pyexec("""
 def try_(p, exc=lambda _: None, els=lambda: None, fin=lambda: None):
+    __result = None
     try:
-        res = p()
+        __result = p()
     except Exception as e:
-        res = exc(e)
+        __result = exc(e)
     else:
         els()
     finally:
         fin()
-        return res
+        return __result
 """)
 .try! = unsound.pyeval("try_")
 assert .try! in |T, U|(