diff --git a/example/http/client/crawl/http_crawl.cpp b/example/http/client/crawl/http_crawl.cpp
index a6fc4eba..5a621d14 100644
--- a/example/http/client/crawl/http_crawl.cpp
+++ b/example/http/client/crawl/http_crawl.cpp
@@ -358,7 +358,7 @@ int main(int argc, char* argv[])
     // Building a tracked executor ensures that the underlying context's
     // run() function will not return until the tracked executor is destroyed
     net::any_io_executor work =
-        net::prefer(
+        net::require(
             ioc.get_executor(),
             net::execution::outstanding_work.tracked);
 
diff --git a/test/beast/websocket/test.hpp b/test/beast/websocket/test.hpp
index b202d67b..1575db32 100644
--- a/test/beast/websocket/test.hpp
+++ b/test/beast/websocket/test.hpp
@@ -85,7 +85,8 @@ public:
             std::ostream& log,
             kind k = kind::sync)
             : log_(log)
-            , work_(net::prefer(ioc_.get_executor(), net::execution::outstanding_work.tracked))
+            , work_(net::require(ioc_.get_executor(),
+                net::execution::outstanding_work.tracked))
             , ts_(ioc_)
             , ws_(ts_)
         {
diff --git a/test/doc/core_snippets.cpp b/test/doc/core_snippets.cpp
index eb52e70f..50dcf49e 100644
--- a/test/doc/core_snippets.cpp
+++ b/test/doc/core_snippets.cpp
@@ -39,7 +39,7 @@ using tcp = net::ip::tcp;
 
 net::io_context ioc;
 net::any_io_executor work =
-    net::prefer(ioc.get_executor(),
+    net::require(ioc.get_executor(),
         net::execution::outstanding_work.tracked);
 std::thread t{[&](){ ioc.run(); }};
 
diff --git a/test/doc/http_snippets.cpp b/test/doc/http_snippets.cpp
index 7f33626a..b3ac3255 100644
--- a/test/doc/http_snippets.cpp
+++ b/test/doc/http_snippets.cpp
@@ -38,7 +38,7 @@ void fxx() {
 
     net::io_context ioc;
     net::any_io_executor work =
-        net::prefer(
+        net::require(
             ioc.get_executor(),
             net::execution::outstanding_work.tracked);
     std::thread t{[&](){ ioc.run(); }};
diff --git a/test/doc/snippets.ipp b/test/doc/snippets.ipp
index b6d2b74f..c96efc71 100644
--- a/test/doc/snippets.ipp
+++ b/test/doc/snippets.ipp
@@ -18,7 +18,7 @@ using tcp     = net::ip::tcp;
 error_code ec;
 net::io_context ioc;
 net::any_io_executor work =
-    net::prefer(
+    net::require(
         ioc.get_executor(),
         net::execution::outstanding_work.tracked);
 std::thread t{[&](){ ioc.run(); }};