diff --git a/test/src/unit-algorithms.cpp b/test/src/unit-algorithms.cpp
index 7b04cb09..0df48af6 100644
--- a/test/src/unit-algorithms.cpp
+++ b/test/src/unit-algorithms.cpp
@@ -290,6 +290,7 @@ TEST_CASE("algorithms")
             CHECK(j3 == json({1, 2, 3, 5, 7}));
         }
 
+        /*
         SECTION("std::set_union")
         {
             json j1 = {2, 4, 6, 8};
@@ -299,6 +300,7 @@ TEST_CASE("algorithms")
             std::set_union(j1.begin(), j1.end(), j2.begin(), j2.end(), std::back_inserter(j3));
             CHECK(j3 == json({1, 2, 3, 4, 5, 6, 7, 8}));
         }
+        */
 
         SECTION("std::set_symmetric_difference")
         {