diff --git a/test/test.h b/test/test.h
index 1b57330..8b3ed16 100644
--- a/test/test.h
+++ b/test/test.h
@@ -115,7 +115,7 @@ void benchmark_prod_cons(T* cq) {
 //                std::cout << cid << "-consumer-disconnect" << std::endl;
 //            }
             tcq.disconnect(cn);
-            if ((fini_c.fetch_add(1, std::memory_order_relaxed) + 1) != std::extent<decltype(consumers)>::value) {
+            if ((fini_c.fetch_add(1, std::memory_order_relaxed) + 1) != M) {
 //                std::unique_lock<capo::spin_lock> guard { lc };
 //                std::cout << cid << "-consumer-end" << std::endl;
                 return;
@@ -141,7 +141,7 @@ void benchmark_prod_cons(T* cq) {
 //                }
                 tcq.send(cn, { pid, i });
             }
-            if ((fini_p.fetch_add(1, std::memory_order_relaxed) + 1) != std::extent<decltype(producers)>::value) {
+            if ((fini_p.fetch_add(1, std::memory_order_relaxed) + 1) != N) {
                 return;
             }
             // quit
diff --git a/test/test_ipc.cpp b/test/test_ipc.cpp
index 768250b..cd43438 100644
--- a/test/test_ipc.cpp
+++ b/test/test_ipc.cpp
@@ -265,12 +265,12 @@ void benchmark_lc() {
                 }
                 std::this_thread::yield();
             }
-            if ((fini.fetch_add(1, std::memory_order_relaxed) + 1) == std::extent<decltype(r_trd)>::value) {
+            if ((fini.fetch_add(1, std::memory_order_relaxed) + 1) == R) {
                 sw.print_elapsed(W, R, Loops);
             }
             std::uint64_t sum = 0;
             for (int i : seq) sum += static_cast<std::uint64_t>(i);
-            QCOMPARE(sum, acc<std::uint64_t>(1, Loops) * std::extent<decltype(w_trd)>::value);
+            QCOMPARE(sum, acc<std::uint64_t>(1, Loops) * W);
         });
     }