diff --git a/crates/ty_python_semantic/src/types/property_tests/type_generation.rs b/crates/ty_python_semantic/src/types/property_tests/type_generation.rs
index 362d603e6b..470f3e0778 100644
--- a/crates/ty_python_semantic/src/types/property_tests/type_generation.rs
+++ b/crates/ty_python_semantic/src/types/property_tests/type_generation.rs
@@ -220,6 +220,8 @@ fn arbitrary_core_type(g: &mut Gen) -> Ty {
         Ty::KnownClassInstance(KnownClass::Str),
         Ty::KnownClassInstance(KnownClass::Int),
         Ty::KnownClassInstance(KnownClass::Bool),
+        Ty::KnownClassInstance(KnownClass::List),
+        Ty::KnownClassInstance(KnownClass::Tuple),
         Ty::KnownClassInstance(KnownClass::FunctionType),
         Ty::KnownClassInstance(KnownClass::SpecialForm),
         Ty::KnownClassInstance(KnownClass::TypeVar),