diff --git a/repos/libports/src/test/lwip/http_clnt/main.cc b/repos/libports/src/test/lwip/http_clnt/main.cc
index a51f563ca4..d43d623e88 100644
--- a/repos/libports/src/test/lwip/http_clnt/main.cc
+++ b/repos/libports/src/test/lwip/http_clnt/main.cc
@@ -122,7 +122,7 @@ void Libc::Component::construct(Libc::Env &env)
 				;
 				if (++success_cnt >= 5) {
 					log("Test done");
-					return;
+					env.parent().exit(0);
 				}
 			} else
 				break;
@@ -132,4 +132,5 @@ void Libc::Component::construct(Libc::Env &env)
 		lwip_close(s);
 	}
 	log("Test failed");
+	env.parent().exit(-1);
 }
diff --git a/repos/libports/src/test/lwip/udp/client/main.cc b/repos/libports/src/test/lwip/udp/client/main.cc
index fb06d446d5..0f77c199af 100644
--- a/repos/libports/src/test/lwip/udp/client/main.cc
+++ b/repos/libports/src/test/lwip/udp/client/main.cc
@@ -78,8 +78,10 @@ void Libc::Component::construct(Libc::Env &env)
 		log("Received \"", String<64>(buf), " ...\"");
 		if (++success_cnt >= 5) {
 			log("Test done");
+			env.parent().exit(0);
 			return;
 		}
 	}
 	log("Test failed");
+	env.parent().exit(-1);
 }