Index: uspace/app/tester/Makefile
===================================================================
--- uspace/app/tester/Makefile	(revision 1f2dd20bb7535f5d8a3876582e186cb29b7d6453)
+++ uspace/app/tester/Makefile	(revision f47c70d4876446756813cc4afd6170be71853e80)
@@ -45,4 +45,5 @@
 	stdio/stdio1.c \
 	stdio/stdio2.c \
+	stdio/logger1.c \
 	fault/fault1.c \
 	fault/fault2.c \
Index: uspace/app/tester/stdio/logger1.c
===================================================================
--- uspace/app/tester/stdio/logger1.c	(revision f47c70d4876446756813cc4afd6170be71853e80)
+++ uspace/app/tester/stdio/logger1.c	(revision f47c70d4876446756813cc4afd6170be71853e80)
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2012 Vojtech Horky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <io/log.h>
+#include "../tester.h"
+
+const char *test_logger1(void)
+{
+	for (log_level_t level = 0; level < LVL_LIMIT; level++) {
+		log_msg(level, "Testing logger, level %d.", (int) level);
+	}
+
+	return NULL;
+}
Index: uspace/app/tester/stdio/logger1.def
===================================================================
--- uspace/app/tester/stdio/logger1.def	(revision f47c70d4876446756813cc4afd6170be71853e80)
+++ uspace/app/tester/stdio/logger1.def	(revision f47c70d4876446756813cc4afd6170be71853e80)
@@ -0,0 +1,6 @@
+{
+	"logger1",
+	"Logger printing test",
+	&test_logger1,
+	true
+},
Index: uspace/app/tester/tester.c
===================================================================
--- uspace/app/tester/tester.c	(revision 1f2dd20bb7535f5d8a3876582e186cb29b7d6453)
+++ uspace/app/tester/tester.c	(revision f47c70d4876446756813cc4afd6170be71853e80)
@@ -39,4 +39,5 @@
 #include <stdio.h>
 #include <str.h>
+#include <io/log.h>
 #include "tester.h"
 
@@ -55,4 +56,5 @@
 #include "stdio/stdio1.def"
 #include "stdio/stdio2.def"
+#include "stdio/logger1.def"
 #include "fault/fault1.def"
 #include "fault/fault2.def"
@@ -138,4 +140,6 @@
 	}
 	
+	log_init("tester", LVL_NOTE);
+
 	test_quiet = false;
 	test_argc = argc - 2;
Index: uspace/app/tester/tester.h
===================================================================
--- uspace/app/tester/tester.h	(revision 1f2dd20bb7535f5d8a3876582e186cb29b7d6453)
+++ uspace/app/tester/tester.h	(revision f47c70d4876446756813cc4afd6170be71853e80)
@@ -88,4 +88,5 @@
 extern const char *test_stdio1(void);
 extern const char *test_stdio2(void);
+extern const char *test_logger1(void);
 extern const char *test_fault1(void);
 extern const char *test_fault2(void);