Provide justification for skipping test in v2

PiperOrigin-RevId: 240418174

tensorflow/python/ops/stateful_random_ops_test.py

@@ -99,7 +99,9 @@ class StatefulRandomOpsTest(test.TestCase):
       check_results(expected_normal1, *f())
       check_results(expected_normal2, *f())
 
-  @test_util.run_v1_only
+  @test_util.run_v1_only(
+      ("This test is specifically for checking TF1 compatibility. "
+       "It cannot run under TF2."))
   def testTF1(self):
     seed = 1234
     shape = [2, 3]