diff --git a/contrib/platform/test/com/sun/jna/platform/mac/CoreFoundationTest.java b/contrib/platform/test/com/sun/jna/platform/mac/CoreFoundationTest.java
index a046717a57..0a83c796e1 100644
--- a/contrib/platform/test/com/sun/jna/platform/mac/CoreFoundationTest.java
+++ b/contrib/platform/test/com/sun/jna/platform/mac/CoreFoundationTest.java
@@ -271,6 +271,9 @@ public void testCFStringRefByReference() {
         // test constructor(null)
         assertNull(new CFStringRef.ByReference(null).getValue());
 
+        // test constructor(CFStringRef)
+        assertTrue(CF.CFEqual(new CFStringRef.ByReference(key).getStringRefValue(), key));
+
         // test setValue(null)
         assertNotNull(byRef.getStringRefValue());
         byRef.setValue(null);
@@ -315,6 +318,9 @@ public void testCFDictionaryRefByReference() {
         // test constructor(null)
         assertNull(new CFDictionaryRef.ByReference(null).getValue());
 
+        // test constructor(CFDictionaryRef)
+        assertTrue(CF.CFEqual(new CFDictionaryRef.ByReference(dict).getDictionaryRefValue(), dict));
+
         // test setValue(null)
         assertNotNull(byRef.getDictionaryRefValue());
         byRef.setValue(null);