diff --git a/mypy/nativeparse.py b/mypy/nativeparse.py
index 622b199227bd..59bc95cbe626 100644
--- a/mypy/nativeparse.py
+++ b/mypy/nativeparse.py
@@ -269,6 +269,8 @@ def native_parse_type_string(
     data = ReadBuffer(ast_bytes)
     ret = read_type(state, data)
     assert isinstance(ret, ProperType)
+    if isinstance(ret, RawExpressionType) and expr_string == "None":
+        return UnboundType("None", line=line, column=column)
     return ret
 
 
diff --git a/test-data/unit/check-newsemanal.test b/test-data/unit/check-newsemanal.test
index f2dec8005183..7b4d4d3ed016 100644
--- a/test-data/unit/check-newsemanal.test
+++ b/test-data/unit/check-newsemanal.test
@@ -2311,6 +2311,12 @@ reveal_type(x.x)  # N: Revealed type is "builtins.int"
 C = NamedTuple('C', [('x', int)])
 [builtins fixtures/tuple.pyi]
 
+[case testNewAnalyzerCastNoneString]
+from typing import Any, cast
+
+def f(x: Any) -> None:
+    return cast("None", x)
+
 [case testNewAnalyzerApplicationForward1]
 # flags: --disable-error-code used-before-def
 from typing import Generic, TypeVar