diff --git a/src/test/validation_tests.cpp b/src/test/validation_tests.cpp
index c6f6ac3bdb4..93a884be6d3 100644
--- a/src/test/validation_tests.cpp
+++ b/src/test/validation_tests.cpp
@@ -233,7 +233,6 @@ BOOST_AUTO_TEST_CASE(block_malleation)
         // Block with two transactions is mutated if any node is duplicate.
         {
             block.vtx[1] = block.vtx[0];
-            BOOST_CHECK(is_mutated(block, /*check_witness_root=*/false));
             HashWriter hasher;
             hasher.write(block.vtx[0]->GetHash());
             hasher.write(block.vtx[1]->GetHash());