diff --git a/xpcom/tests/TestCOMPtr.cpp b/xpcom/tests/TestCOMPtr.cpp
index 4253e762eddf..6a20eb867a7c 100644
--- a/xpcom/tests/TestCOMPtr.cpp
+++ b/xpcom/tests/TestCOMPtr.cpp
@@ -69,6 +69,7 @@ typedef unsigned long NS_RESULT;
           nsresult  CreateIFoo( void** );
           nsresult  CreateIBar( void** result );
               void  AnIFooPtrPtrContext( IFoo** );
+              void	AnISupportsPtrPtrContext( nsISupports** );
               void  AVoidPtrPtrContext( void** );
               void  set_a_IFoo( nsCOMPtr<IFoo>* result );
 nsCOMPtr<IFoo>  return_a_IFoo();
@@ -291,6 +292,11 @@ AVoidPtrPtrContext( void** )
   {
   }
 
+void
+AnISupportsPtrPtrContext( nsISupports** )
+	{
+	}
+
 
 // Optimism
 #define TEST_EXCEPTIONS 1
@@ -612,6 +618,23 @@ main()
     cout << "### End Test 24" << endl;
 
 
+		{
+			nsCOMPtr<IFoo> fooP;
+
+			AnIFooPtrPtrContext( getter_AddRefs(fooP) );
+			AVoidPtrPtrContext( getter_AddRefs(fooP) );
+			AnISupportsPtrPtrContext( getter_AddRefs(fooP) );
+		}
+
+
+		{
+			nsCOMPtr<nsISupports> supportsP;
+
+			AVoidPtrPtrContext( getter_AddRefs(supportsP) );
+			AnISupportsPtrPtrContext( getter_AddRefs(supportsP) );
+		}
+
+
     cout << endl << "### Test 25: will a static |nsCOMPtr| |Release| before program termination?" << endl;
     gFoop = do_QueryInterface(new IFoo);