diff --git a/Sources/ViewInspection/DummyObjects.swift b/Sources/ViewInspection/DummyObjects.swift
index 9350a5d..d3f1515 100644
--- a/Sources/ViewInspection/DummyObjects.swift
+++ b/Sources/ViewInspection/DummyObjects.swift
@@ -10,11 +10,6 @@ import SwiftUI
     final class NSDummyDelegate: NSObject, NSApplicationDelegate {}
 #endif
 
-final class DummyOnservableOnject: ObservableObject {}
-
-@available(iOS 17.0, macOS 14.0, tvOS 17.0, watchOS 10.0, *)
-@Observable final class DummyOnservable {}
-
 enum DummyEnum {
     case case0
     case case1
diff --git a/Sources/ViewInspection/Generated/InspectableType+Dynamicproperty.swift b/Sources/ViewInspection/Generated/InspectableType+Dynamicproperty.swift
index de46aa4..52e3d2f 100644
--- a/Sources/ViewInspection/Generated/InspectableType+Dynamicproperty.swift
+++ b/Sources/ViewInspection/Generated/InspectableType+Dynamicproperty.swift
@@ -9,14 +9,14 @@ typealias _Binding = SameBaseElement<Binding<Never>>
 
 typealias _Environment = SameBaseElement<Environment<Never>>
 
-typealias _EnvironmentObject = SameBaseElement<EnvironmentObject<DummyOnservableOnject>>
+typealias _EnvironmentObject = SameBaseElement<EnvironmentObject<_PreviewHost>>
 
 typealias _FetchRequest = SameBaseElement<FetchRequest<NSDictionary>>
 
 typealias _FocusedBinding = SameBaseElement<FocusedBinding<Never>>
 
 @available(iOS 16.0, macOS 13.0, tvOS 16.0, watchOS 9.0, *)
-typealias _FocusedObject = SameBaseElement<FocusedObject<DummyOnservableOnject>>
+typealias _FocusedObject = SameBaseElement<FocusedObject<_PreviewHost>>
 
 typealias _FocusedValue = SameBaseElement<FocusedValue<Never>>
 
@@ -34,7 +34,7 @@ typealias _Namespace = SameBaseElement<Namespace>
 typealias _NSApplicationDelegateAdaptor = SameBaseElement<NSApplicationDelegateAdaptor<NSDummyDelegate>>
 #endif
 
-typealias _ObservedObject = SameBaseElement<ObservedObject<DummyOnservableOnject>>
+typealias _ObservedObject = SameBaseElement<ObservedObject<_PreviewHost>>
 
 typealias _ScaledMetric = SameBaseElement<ScaledMetric<Double>>
 
@@ -44,7 +44,7 @@ typealias _SectionedFetchRequest = SameBaseElement<SectionedFetchRequest<Int,NSD
 
 typealias _State = SameBaseElement<State<Never>>
 
-typealias _StateObject = SameBaseElement<StateObject<DummyOnservableOnject>>
+typealias _StateObject = SameBaseElement<StateObject<_PreviewHost>>
 
 #if os(iOS) || os(tvOS)
 @available(macOS, unavailable)
diff --git a/Tools/apple_parser.py b/Tools/apple_parser.py
index bd7bc61..e3ff37d 100644
--- a/Tools/apple_parser.py
+++ b/Tools/apple_parser.py
@@ -68,8 +68,8 @@ def get_names(entity):
     'UIApplicationDelegate': 'UIDummyDelegate',
     'NSObject': 'NSObject',
     'BinaryFloatingPoint': 'Double',
-    'Onservable': 'DummyOnservable',
-    'ObservableObject': 'DummyOnservableOnject',
+    'Onservable': '_PreviewHost',
+    'ObservableObject': '_PreviewHost',
     'NSFetchRequestResult':  'NSDictionary',
     'View' : 'Never',
     'Shape': 'Circle',