1 files changed, 1 insertions, 0 deletions
diff --git a/eval/src/tests/tensor/dense_xw_product_function/dense_xw_product_function_test.cpp b/eval/src/tests/tensor/dense_xw_product_function/dense_xw_product_function_test.cpp
index 01abad343ae..536dd95de9c 100644
--- a/eval/src/tests/tensor/dense_xw_product_function/dense_xw_product_function_test.cpp
+++ b/eval/src/tests/tensor/dense_xw_product_function/dense_xw_product_function_test.cpp
@@ -63,6 +63,7 @@ void verify_optimized(const vespalib::string &expr, size_t vec_size, size_t res_
     EXPECT_EQUAL(fixture.result(), EvalFixture::ref(expr, param_repo));
     auto info = fixture.find_all<DenseXWProductFunction>();
     ASSERT_EQUAL(info.size(), 1u);
+    EXPECT_TRUE(info[0]->result_is_mutable());
     EXPECT_EQUAL(info[0]->vectorSize(), vec_size);
     EXPECT_EQUAL(info[0]->resultSize(), res_size);
     EXPECT_EQUAL(info[0]->matrixHasCommonDimensionInnermost(), happy);