fix ut for static graph (#27506)

python/paddle/fluid/tests/unittests/test_dist_fleet_ps6.py

@@ -15,11 +15,14 @@
 from __future__ import print_function
 
 import unittest
+import paddle
 import paddle.fluid as fluid
 import paddle.fluid.incubate.fleet.base.role_maker as role_maker
 from paddle.fluid.incubate.fleet.parameter_server.distribute_transpiler import fleet
 from paddle.fluid.incubate.fleet.parameter_server.distribute_transpiler.distributed_strategy import StrategyFactory
 
+paddle.enable_static()
+
 # For Net
 base_lr = 0.2
 emb_lr = base_lr * 3

python/paddle/fluid/tests/unittests/test_dist_lookup_sparse_table_fuse_ops.py

@@ -20,6 +20,9 @@ import numpy as np
 import paddle.fluid as fluid
 import paddle.fluid.core as core
 
+import paddle
+paddle.enable_static()
+
 
 class TestLookupTableFuseOp(unittest.TestCase):
     def test_fuse(self):