diff --git a/python/paddle/fluid/tests/unittests/dist_ctr.py b/python/paddle/fluid/tests/unittests/dist_ctr.py
index e696ef23bdd41beeb8d52631fbfa1ee2ea30e068..fd09d47258fdfbf6d4a285df7d53c81f7489f39e 100644
--- a/python/paddle/fluid/tests/unittests/dist_ctr.py
+++ b/python/paddle/fluid/tests/unittests/dist_ctr.py
@@ -99,10 +99,10 @@ class TestDistCTR2x2(TestDistRunnerBase):
         inference_program = paddle.fluid.default_main_program().clone()
 
         regularization = None
-        use_l2_decay = bool(os.getenv(['USE_L2_DECAY'], 0))
+        use_l2_decay = bool(os.getenv('USE_L2_DECAY', 0))
         if use_l2_decay:
             regularization = fluid.regularizer.L2DecayRegularizer(
-                regularization_coeff=1e-3)
+                regularization_coeff=1e-1)
 
         sgd_optimizer = fluid.optimizer.SGD(learning_rate=0.0001,
                                             regularization=regularization)