Use message name as defined in php runtime.
diff --git a/php/tests/generated_class_test.php b/php/tests/generated_class_test.php
index 86e6868..98918bc 100644
--- a/php/tests/generated_class_test.php
+++ b/php/tests/generated_class_test.php
@@ -14,6 +14,8 @@
 use Foo\TestMessage;
 use Foo\TestMessage_Sub;
 use Foo\TestReverseFieldOrder;
+use Foo\testLowerCaseMessage;
+use Foo\testLowerCaseEnum;
 use Php\Test\TestNamespace;
 
 class GeneratedClassTest extends TestBase
@@ -715,4 +717,14 @@
         $this->assertSame("abc", $m->getB());
         $this->assertNotSame("abc", $m->getA());
     }
+
+    #########################################################
+    # Test Reverse Field Order.
+    #########################################################
+
+    public function testLowerCase()
+    {
+        $m = new testLowerCaseMessage();
+        $n = testLowerCaseEnum::VALUE;
+    }
 }