diff --git a/tests/libtest/chkhostname.c b/tests/libtest/chkhostname.c
index 58930467f..bf0dbfda2 100644
--- a/tests/libtest/chkhostname.c
+++ b/tests/libtest/chkhostname.c
@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -21,6 +21,8 @@
  ***************************************************************************/
 #include "setup.h"
 
+#undef CURL_HIDDEN_SYMBOLS /* libcurl internal use only */
+
 #include "curl_gethostname.h"
 
 #define HOSTNAME_MAX 1024
diff --git a/tests/libtest/sethostname.c b/tests/libtest/sethostname.c
index daf94f95c..d5d5cf9e2 100644
--- a/tests/libtest/sethostname.c
+++ b/tests/libtest/sethostname.c
@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -19,9 +19,10 @@
  * KIND, either express or implied.
  *
  ***************************************************************************/
-
 #include "setup.h"
 
+#undef CURL_HIDDEN_SYMBOLS /* libcurl internal use only */
+
 #include "sethostname.h"
 
 /*
diff --git a/tests/libtest/test.h b/tests/libtest/test.h
index 861a571a5..119debd68 100644
--- a/tests/libtest/test.h
+++ b/tests/libtest/test.h
@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -29,6 +29,8 @@
 
 #include "setup.h"
 
+#undef CURL_HIDDEN_SYMBOLS /* libcurl internal use only */
+
 #include <curl/curl.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/tests/libtest/testutil.c b/tests/libtest/testutil.c
index 4ee488e71..fc79e5c63 100644
--- a/tests/libtest/testutil.c
+++ b/tests/libtest/testutil.c
@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2008, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -19,9 +19,10 @@
  * KIND, either express or implied.
  *
  ***************************************************************************/
-
 #include "setup.h"
 
+#undef CURL_HIDDEN_SYMBOLS /* libcurl internal use only */
+
 #include "testutil.h"
 #include "memdebug.h"
 
diff --git a/tests/libtest/testutil.h b/tests/libtest/testutil.h
index 6a322e3cb..455b5d53f 100644
--- a/tests/libtest/testutil.h
+++ b/tests/libtest/testutil.h
@@ -1,5 +1,5 @@
-#ifndef __LIBTEST_TESTUTIL_H
-#define __LIBTEST_TESTUTIL_H
+#ifndef HEADER_CURL_LIBTEST_TESTUTIL_H
+#define HEADER_CURL_LIBTEST_TESTUTIL_H
 /***************************************************************************
  *                                  _   _ ____  _
  *  Project                     ___| | | |  _ \| |
@@ -7,7 +7,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2007, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -21,9 +21,9 @@
  * KIND, either express or implied.
  *
  ***************************************************************************/
-
 #include "setup.h"
 
+#undef CURL_HIDDEN_SYMBOLS /* libcurl internal use only */
 
 struct timeval tutil_tvnow(void);
 
@@ -45,5 +45,5 @@ double tutil_tvdiff_secs(struct timeval t1, struct timeval t2);
 long tutil_tvlong(struct timeval t1);
 
 
-#endif  /* __LIBTEST_TESTUTIL_H */
+#endif  /* HEADER_CURL_LIBTEST_TESTUTIL_H */