diff --git a/core/kernel/trust_spec.rb b/core/kernel/trust_spec.rb
index 4665036da..5cb1f61a1 100644
--- a/core/kernel/trust_spec.rb
+++ b/core/kernel/trust_spec.rb
@@ -17,4 +17,12 @@
       }.should complain(/Object#trust is deprecated and will be removed in Ruby 3.2/, verbose: true)
     end
   end
+
+  ruby_version_is "3.2" do
+    it "has been removed" do
+      -> {
+        Object.new.trust
+    }.should raise_error(NoMethodError, /undefined method `trust' for/)
+    end
+  end
 end
diff --git a/core/kernel/untrust_spec.rb b/core/kernel/untrust_spec.rb
index ba0e073cf..b41de6354 100644
--- a/core/kernel/untrust_spec.rb
+++ b/core/kernel/untrust_spec.rb
@@ -16,4 +16,12 @@
       }.should complain(/Object#untrust is deprecated and will be removed in Ruby 3.2/, verbose: true)
     end
   end
+
+  ruby_version_is "3.2" do
+    it "has been removed" do
+      -> {
+        Object.new.untrust
+    }.should raise_error(NoMethodError, /undefined method `untrust' for/)
+    end
+  end
 end
diff --git a/core/kernel/untrusted_spec.rb b/core/kernel/untrusted_spec.rb
index 517bd4711..8987a4c56 100644
--- a/core/kernel/untrusted_spec.rb
+++ b/core/kernel/untrusted_spec.rb
@@ -17,4 +17,12 @@
       }.should complain(/Object#untrusted\? is deprecated and will be removed in Ruby 3.2/, verbose: true)
     end
   end
+
+  ruby_version_is "3.2" do
+    it "has been removed" do
+      -> {
+        Object.new.untrusted?
+    }.should raise_error(NoMethodError, /undefined method `untrusted?/)
+    end
+  end
 end