diff --git a/src/hotspot/share/classfile/javaClasses.cpp b/src/hotspot/share/classfile/javaClasses.cpp
index 77a94c8afa5..dd70d7b49ab 100644
--- a/src/hotspot/share/classfile/javaClasses.cpp
+++ b/src/hotspot/share/classfile/javaClasses.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -4297,10 +4297,6 @@ int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
   macro(_method_type_offset,           k, "methodType",          java_lang_invoke_MethodType_signature, false); \
   macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
 
-bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
-  return obj != nullptr && is_subclass(obj->klass());
-}
-
 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
   InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
   NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
@@ -4337,10 +4333,6 @@ int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
   macro(_scratch1_offset,        k, "scratch1",        jdk_internal_foreign_abi_VMStorage_signature, false); \
   macro(_scratch2_offset,        k, "scratch2",        jdk_internal_foreign_abi_VMStorage_signature, false);
 
-bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
-  return obj != nullptr && is_subclass(obj->klass());
-}
-
 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
   InstanceKlass* k = vmClasses::ABIDescriptor_klass();
   ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
diff --git a/src/hotspot/share/classfile/javaClasses.hpp b/src/hotspot/share/classfile/javaClasses.hpp
index 33dc912404c..a8562a345c8 100644
--- a/src/hotspot/share/classfile/javaClasses.hpp
+++ b/src/hotspot/share/classfile/javaClasses.hpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1179,13 +1179,6 @@ class jdk_internal_foreign_abi_NativeEntryPoint: AllStatic {
   static oop        method_type(oop entry);
   static jlong      downcall_stub_address(oop entry);
 
-  // Testers
-  static bool is_subclass(Klass* klass) {
-    return vmClasses::NativeEntryPoint_klass() != nullptr &&
-      klass->is_subclass_of(vmClasses::NativeEntryPoint_klass());
-  }
-  static bool is_instance(oop obj);
-
   // Accessors for code generation:
   static int method_type_offset_in_bytes()           { return _method_type_offset; }
   static int downcall_stub_address_offset_in_bytes() { return _downcall_stub_address_offset; }
@@ -1216,13 +1209,6 @@ class jdk_internal_foreign_abi_ABIDescriptor: AllStatic {
   static jint        shadowSpace(oop entry);
   static oop         scratch1(oop entry);
   static oop         scratch2(oop entry);
-
-  // Testers
-  static bool is_subclass(Klass* klass) {
-    return vmClasses::ABIDescriptor_klass() != nullptr &&
-      klass->is_subclass_of(vmClasses::ABIDescriptor_klass());
-  }
-  static bool is_instance(oop obj);
 };
 
 class jdk_internal_foreign_abi_VMStorage: AllStatic {