diff --git a/tests/TestClassDef.h b/tests/TestClassDef.h
new file mode 100644
index 0000000..77f48b3
--- /dev/null
+++ b/tests/TestClassDef.h
@@ -0,0 +1,24 @@
+/*  This file is meant be including by .cpp files, so it can spew out a
+    customized class + global definition.
+ 
+    e.g.
+    #include "TestClassDef.h"
+    DEFINE_TESTCLASS("MyTest", MyTestClass, MyTestFunction)
+ 
+    where MyTestFunction is declared as
+ 
+        void MyTestFunction(skiatest::Reporter*)
+*/
+
+#define DEFINE_TESTCLASS(uiname, classname, function)                       \
+    namespace skiatest {                                                    \
+        class classname : public Test {                                     \
+        public:                                                             \
+            static Test* Factory(void*) { return SkNEW(classname); }        \
+        protected:                                                          \
+            virtual void onGetName(SkString* name) { name->set(uiname); }   \
+            virtual void onRun(Reporter* reporter) { function(reporter); }  \
+        };                                                                  \
+        static TestRegistry gReg(classname::Factory);                       \
+    }
+