diff --git a/cpp/velox/tests/VeloxSubstraitRoundTripTest.cc b/cpp/velox/tests/VeloxSubstraitRoundTripTest.cc
index 0795f39273542..fc302c8d78395 100644
--- a/cpp/velox/tests/VeloxSubstraitRoundTripTest.cc
+++ b/cpp/velox/tests/VeloxSubstraitRoundTripTest.cc
@@ -108,7 +108,7 @@ TEST_F(VeloxSubstraitRoundTripTest, project) {
   auto vectors = makeVectors(3, 4, 2);
   createDuckDbTable(vectors);
   auto plan = PlanBuilder().values(vectors).project({"c0 + c1", "c1 / c2"}).planNode();
-  assertPlanConversion(plan, "SELECT c0 + c1, c1 / c2 FROM tmp");
+  assertPlanConversion(plan, "SELECT c0 + c1, c1 // c2 FROM tmp");
 }
 
 TEST_F(VeloxSubstraitRoundTripTest, cast) {