diff --git a/.travis.yml b/.travis.yml
index ebeaa3b711..541b552669 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,5 +17,5 @@ before_script:
   - mkdir darwin && cd darwin
 
 script:
-  - cmake .. -DTRAVIS=ON
+  - cmake .. -DTRAVIS=ON -DEXTRA_TESTS=ON
   - make VERBOSE=1 && ./unittests --pass
diff --git a/examples/demo_service/service.cpp b/examples/demo_service/service.cpp
index 29567cd4a1..10a845f3d3 100644
--- a/examples/demo_service/service.cpp
+++ b/examples/demo_service/service.cpp
@@ -82,8 +82,10 @@ http::Response handle_request(const http::Request& req)
 void Service::start(const std::string&)
 {
   // DHCP on interface 0
+  printf("*** Waiting up to 10 sec. for DHCP... ***\n");
   auto& inet = net::Inet4::ifconfig(5.0, [](bool timeout) {
     if (timeout) {
+      printf("*** Falling back to static network config ***\n");
       // static IP in case DHCP fails
       net::Inet4::stack().network_config(
         { 10,0,0,42 },     // IP
diff --git a/test/posix/integration/stat/ftw_tests.cpp b/test/posix/integration/stat/ftw_tests.cpp
index cf002bfb70..51d6aec421 100644
--- a/test/posix/integration/stat/ftw_tests.cpp
+++ b/test/posix/integration/stat/ftw_tests.cpp
@@ -98,7 +98,7 @@ void ftw_tests()
   printf("Total size: %ld\n", total_size);
 }
 
-int display_info(const char *fpath, const struct stat *sb, int flag, struct FTW *ftwbuf)
+int display_info(const char *fpath, const struct stat *sb, int flag, struct FTW *)
 {
   printf("%ld\t%s (%d)\n", sb->st_size, fpath, flag);
 #ifdef EXTRAVERBOSE
diff --git a/test/posix/integration/stat/test_stat_ftw.cpp b/test/posix/integration/stat/test_stat_ftw.cpp
index 849e937d6e..024240cc8d 100644
--- a/test/posix/integration/stat/test_stat_ftw.cpp
+++ b/test/posix/integration/stat/test_stat_ftw.cpp
@@ -24,12 +24,12 @@
 int ftw_tests();
 int stat_tests();
 
-fs::Disk_ptr& memdisk() {
-  static auto disk = fs::new_shared_memdisk();
+fs::Disk& memdisk() {
+  fs::Disk& disk = fs::memdisk();
 
-  if (not disk->fs_ready()) {
-    printf("%s\n", disk->name().c_str());
-    disk->init_fs([](fs::error_t err, auto&) {
+  if (not disk.fs_ready()) {
+    printf("%s\n", disk.name().c_str());
+    disk.init_fs([](fs::error_t err, auto&) {
         if (err) {
           printf("ERROR MOUNTING DISK\n");
           exit(127);
@@ -44,7 +44,7 @@ int main()
   INFO("POSIX stat", "Running tests for POSIX stat");
 
   // mount a disk with contents for testing
-  auto root = memdisk()->fs().stat("/");
+  auto root = memdisk().fs().stat("/");
   fs::mount("/mnt/disk", root, "test root");
 
   fs::print_tree();