diff --git a/libs/pika/execution/tests/unit/algorithm_ensure_started.cpp b/libs/pika/execution/tests/unit/algorithm_ensure_started.cpp
index 033996ca2..1d67a9234 100644
--- a/libs/pika/execution/tests/unit/algorithm_ensure_started.cpp
+++ b/libs/pika/execution/tests/unit/algorithm_ensure_started.cpp
@@ -150,6 +150,7 @@ int main()
         PIKA_TEST(set_error_called);
     }
 
+#if !defined(PIKA_HAVE_STDEXEC)
     {
         std::atomic<bool> set_error_called{false};
         auto s =
@@ -160,6 +161,7 @@ int main()
         ex::start(os);
         PIKA_TEST(set_error_called);
     }
+#endif
 
     // It's allowed to discard the sender from ensure_started
     {