diff --git a/planner/core/logical_plan_trace_test.go b/planner/core/logical_plan_trace_test.go
index 43dd15c5179e8..a315e9a23ea3f 100644
--- a/planner/core/logical_plan_trace_test.go
+++ b/planner/core/logical_plan_trace_test.go
@@ -97,7 +97,7 @@ func (s *testPlanSuite) TestSingleRuleTraceStep(c *C) {
 				},
 				{
 					assertReason: "",
-					assertAction: "The conditions[lt(test.t.a, 1)] are pushed down across DataSource_1",
+					assertAction: "The conditions[lt(test.t.a, 1)] are pushed down across DataSource_2",
 				},
 				{
 					assertAction: "Selection_4 is removed",