diff --git a/Lib/test/test_peg_generator/test_c_parser.py b/Lib/test/test_peg_generator/test_c_parser.py
index 2c13635d37..b29bac8155 100644
--- a/Lib/test/test_peg_generator/test_c_parser.py
+++ b/Lib/test/test_peg_generator/test_c_parser.py
@@ -90,7 +90,7 @@ class TestCParser(TempdirManager, unittest.TestCase):
 
     def test_c_parser(self) -> None:
         grammar_source = """
-        start[mod_ty]: a=stmt* $ { Module(a, NULL, p->arena) }
+        start[mod_ty]: a=stmt* $ { Module((asdl_stmt_seq *)a, NULL, p->arena) }
         stmt[stmt_ty]: a=expr_stmt { a }
         expr_stmt[stmt_ty]: a=expression NEWLINE { _Py_Expr(a, EXTRA) }
         expression[expr_ty]: ( l=expression '+' r=term { _Py_BinOp(l, Add, r, EXTRA) }
@@ -231,7 +231,7 @@ class TestCParser(TempdirManager, unittest.TestCase):
 
     def test_return_stmt_noexpr_action(self) -> None:
         grammar_source = """
-        start[mod_ty]: a=[statements] ENDMARKER { Module(a, NULL, p->arena) }
+        start[mod_ty]: a=[statements] ENDMARKER { Module((asdl_stmt_seq *)a, NULL, p->arena) }
         statements[asdl_seq*]: a=statement+ { a }
         statement[stmt_ty]: simple_stmt
         simple_stmt[stmt_ty]: small_stmt
@@ -246,7 +246,7 @@ class TestCParser(TempdirManager, unittest.TestCase):
 
     def test_gather_action_ast(self) -> None:
         grammar_source = """
-        start[mod_ty]: a=';'.pass_stmt+ NEWLINE ENDMARKER { Module(a, NULL, p->arena) }
+        start[mod_ty]: a=';'.pass_stmt+ NEWLINE ENDMARKER { Module((asdl_stmt_seq *)a, NULL, p->arena) }
         pass_stmt[stmt_ty]: a='pass' { _Py_Pass(EXTRA)}
         """
         test_source = """
@@ -257,7 +257,7 @@ class TestCParser(TempdirManager, unittest.TestCase):
 
     def test_pass_stmt_action(self) -> None:
         grammar_source = """
-        start[mod_ty]: a=[statements] ENDMARKER { Module(a, NULL, p->arena) }
+        start[mod_ty]: a=[statements] ENDMARKER { Module((asdl_stmt_seq *)a, NULL, p->arena) }
         statements[asdl_seq*]: a=statement+ { a }
         statement[stmt_ty]: simple_stmt
         simple_stmt[stmt_ty]: small_stmt
@@ -272,7 +272,7 @@ class TestCParser(TempdirManager, unittest.TestCase):
 
     def test_if_stmt_action(self) -> None:
         grammar_source = """
-        start[mod_ty]: a=[statements] ENDMARKER { Module(a, NULL, p->arena) }
+        start[mod_ty]: a=[statements] ENDMARKER { Module((asdl_stmt_seq *)a, NULL, p->arena) }
         statements[asdl_seq*]: a=statement+ { _PyPegen_seq_flatten(p, a) }
         statement[asdl_seq*]:  a=compound_stmt { _PyPegen_singleton_seq(p, a) } | simple_stmt
 
@@ -299,11 +299,11 @@ class TestCParser(TempdirManager, unittest.TestCase):
 
     def test_same_name_different_types(self) -> None:
         grammar_source = """
-        start[mod_ty]: a=import_from+ NEWLINE ENDMARKER { Module(a, NULL, p->arena)}
+        start[mod_ty]: a=import_from+ NEWLINE ENDMARKER { Module((asdl_stmt_seq *)a, NULL, p->arena)}
         import_from[stmt_ty]: ( a='from' !'import' c=simple_name 'import' d=import_as_names_from {
-                                _Py_ImportFrom(c->v.Name.id, d, 0, EXTRA) }
+                                _Py_ImportFrom(c->v.Name.id, (asdl_alias_seq *)d, 0, EXTRA) }
                             | a='from' '.' 'import' c=import_as_names_from {
-                                _Py_ImportFrom(NULL, c, 1, EXTRA) }
+                                _Py_ImportFrom(NULL, (asdl_alias_seq *)c, 1, EXTRA) }
                             )
         simple_name[expr_ty]: NAME
         import_as_names_from[asdl_seq*]: a=','.import_as_name_from+ { a }
@@ -319,13 +319,13 @@ class TestCParser(TempdirManager, unittest.TestCase):
 
     def test_with_stmt_with_paren(self) -> None:
         grammar_source = """
-        start[mod_ty]: a=[statements] ENDMARKER { Module(a, NULL, p->arena) }
+        start[mod_ty]: a=[statements] ENDMARKER { Module((asdl_stmt_seq *)a, NULL, p->arena) }
         statements[asdl_seq*]: a=statement+ { _PyPegen_seq_flatten(p, a) }
         statement[asdl_seq*]: a=compound_stmt { _PyPegen_singleton_seq(p, a) }
         compound_stmt[stmt_ty]: with_stmt
         with_stmt[stmt_ty]: (
             a='with' '(' b=','.with_item+ ')' ':' c=block {
-                _Py_With(b, _PyPegen_singleton_seq(p, c), NULL, EXTRA) }
+                _Py_With((asdl_withitem_seq *)b, (asdl_stmt_seq *)_PyPegen_singleton_seq(p, c), NULL, EXTRA) }
         )
         with_item[withitem_ty]: (
             e=NAME o=['as' t=NAME { t }] { _Py_withitem(e, _PyPegen_set_expr_context(p, o, Store), p->arena) }
@@ -345,14 +345,14 @@ class TestCParser(TempdirManager, unittest.TestCase):
 
     def test_ternary_operator(self) -> None:
         grammar_source = """
-        start[mod_ty]: a=expr ENDMARKER { Module(a, NULL, p->arena) }
+        start[mod_ty]: a=expr ENDMARKER { Module((asdl_stmt_seq *)a, NULL, p->arena) }
         expr[asdl_seq*]: a=listcomp NEWLINE { _PyPegen_singleton_seq(p, _Py_Expr(a, EXTRA)) }
         listcomp[expr_ty]: (
-            a='[' b=NAME c=for_if_clauses d=']' { _Py_ListComp(b, c, EXTRA) }
+            a='[' b=NAME c=for_if_clauses d=']' { _Py_ListComp(b, (asdl_comprehension_seq *)c, EXTRA) }
         )
         for_if_clauses[asdl_seq*]: (
             a=(y=[ASYNC] 'for' a=NAME 'in' b=NAME c=('if' z=NAME { z })*
-                { _Py_comprehension(_Py_Name(((expr_ty) a)->v.Name.id, Store, EXTRA), b, c, (y == NULL) ? 0 : 1, p->arena) })+ { a }
+                { _Py_comprehension(_Py_Name(((expr_ty) a)->v.Name.id, Store, EXTRA), b, (asdl_expr_seq *)c, (y == NULL) ? 0 : 1, p->arena) })+ { a }
         )
         """
         test_source = """