diff --git a/test/gtest/ucg/test_op.cc b/test/gtest/ucg/test_op.cc
index 8331b8bfde2..11cd6d9ca76 100644
--- a/test/gtest/ucg/test_op.cc
+++ b/test/gtest/ucg/test_op.cc
@@ -223,4 +223,6 @@ TEST_F(ucg_op_test, test_op_trigger) {
     ret = ucg_builtin_op_trigger(op, 0, &request);
     ASSERT_EQ(UCS_INPROGRESS, ret);
     ucg_builtin_component.destroy(group);
+    m_ucg_worker = NULL;
+    m_ucg_context = NULL;
 }
diff --git a/test/gtest/ucg/test_step.cc b/test/gtest/ucg/test_step.cc
index 183de729e3f..c43990e1f96 100644
--- a/test/gtest/ucg/test_step.cc
+++ b/test/gtest/ucg/test_step.cc
@@ -346,6 +346,8 @@ TEST_F(ucg_step_test, test_step_execute_bcopy) {
     delete iface;
     step->uct_iface = NULL;
     ASSERT_EQ(UCS_OK, ret);
+    m_ucg_worker = NULL;
+    m_ucg_context = NULL;
 }
 
 TEST_F(ucg_step_test, test_step_execute_zcopy) {
@@ -393,4 +395,6 @@ TEST_F(ucg_step_test, test_step_execute_zcopy) {
     step->uct_iface = NULL;
     ASSERT_EQ(UCS_OK, ret);
     ASSERT_EQ((unsigned)0, step->zcopy.num_store);
+    m_ucg_worker = NULL;
+    m_ucg_context = NULL;
 }