diff --git a/.gitignore b/.gitignore
index 12b6bd37..1b122cad 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,7 @@ kernel/bin/moon.elf
 initrd/sys/moon.sym
 initrd/bin/**
 apps/bin/**
+tests/**/bin/**
 base/usr/include/**
 base/usr/lib/**
 **/*.a
\ No newline at end of file
diff --git a/kernel/src/main.cpp b/kernel/src/main.cpp
index 78a7a28f..13030466 100644
--- a/kernel/src/main.cpp
+++ b/kernel/src/main.cpp
@@ -35,6 +35,9 @@
 #include "thread/PIT.h"
 #include "thread/Scheduler.h"
 
+#define STRINGIZE(x) #x
+#define STRINGIZE_VALUE_OF(x) STRINGIZE(x)
+
 extern "C" void _start()
 {
     Init::check_magic();
@@ -73,7 +76,11 @@ extern "C" void _start()
         }
     });
 
+#ifdef RUN_TEST_AS_INIT
+    Scheduler::load_user_task(STRINGIZE_VALUE_OF(RUN_TEST_AS_INIT));
+#else
     Scheduler::load_user_task("/bin/init");
+#endif
 
     kinfoln("Prepared scheduler tasks");
 
diff --git a/tests/Makefile b/tests/Makefile
new file mode 100644
index 00000000..38f21741
--- /dev/null
+++ b/tests/Makefile
@@ -0,0 +1,9 @@
+build:
+	make -C libc build
+
+install:
+	make -C libc install
+
+test:
+	make -C libc test
+	
\ No newline at end of file
diff --git a/tests/Test.h b/tests/Test.h
new file mode 100644
index 00000000..0430c7e5
--- /dev/null
+++ b/tests/Test.h
@@ -0,0 +1,36 @@
+#pragma once
+#include <stdbool.h>
+
+int printf(const char*, ...);
+
+#define DEFINE_TEST(name) bool test_##name()
+#define START_TEST(name) printf("testing whether %s works... ", #name)
+#define START_TEST_CASE(name) printf("testing %s...\n", #name)
+
+#define TEST_SUCCESS()                                                                                                 \
+    do {                                                                                                               \
+        printf("yes!\n");                                                                                              \
+        return true;                                                                                                   \
+    } while (0)
+
+#define TEST_FAIL()                                                                                                    \
+    do {                                                                                                               \
+        printf("no\n");                                                                                                \
+        return false;                                                                                                  \
+    } while (0)
+
+#define EXPECT(expr)                                                                                                   \
+    do {                                                                                                               \
+        if (!(expr)) { TEST_FAIL(); }                                                                                  \
+    } while (0)
+
+#define EXPECT_EQ(a, b) EXPECT((a) == (b))
+
+#define EXPECT_NOT_EQ(a, b) EXPECT((a) != (b))
+
+#define EXPECT_NOT_CRASHED() TEST_SUCCESS()
+
+#define RUN_TEST(name)                                                                                                 \
+    do {                                                                                                               \
+        if (!test_##name()) return 1;                                                                                  \
+    } while (0)
\ No newline at end of file
diff --git a/tests/libc/Makefile b/tests/libc/Makefile
new file mode 100644
index 00000000..3f6e9ce5
--- /dev/null
+++ b/tests/libc/Makefile
@@ -0,0 +1,15 @@
+TESTDIR := $(LUNA_ROOT)/tests/libc
+DESTDIR := $(LUNA_ROOT)/initrd/bin
+
+build:
+	@mkdir -p $(TESTDIR)/bin
+	$(LUNA_ROOT)/tools/sync-libc.sh
+	$(CC) $(TESTDIR)/string.c $(TESTDIR)/Test.c -I$(LUNA_ROOT)/tests -o $(TESTDIR)/bin/test-libc
+
+install:
+	$(LUNA_ROOT)/tools/clean.sh
+	@mkdir -p $(DESTDIR)
+	cp $(TESTDIR)/bin/test-libc $(DESTDIR)/test-libc
+
+test:
+	CFLAGS="-DRUN_TEST_AS_INIT=/bin/test-libc" $(LUNA_ROOT)/tools/run.sh
\ No newline at end of file
diff --git a/tests/libc/Test.c b/tests/libc/Test.c
new file mode 100644
index 00000000..b97475b0
--- /dev/null
+++ b/tests/libc/Test.c
@@ -0,0 +1,9 @@
+#include "Test.h"
+
+DEFINE_TEST(strlen);
+
+int main()
+{
+    START_TEST_CASE(string.h);
+    RUN_TEST(strlen);
+}
\ No newline at end of file
diff --git a/tests/libc/string.c b/tests/libc/string.c
new file mode 100644
index 00000000..a603dcc6
--- /dev/null
+++ b/tests/libc/string.c
@@ -0,0 +1,21 @@
+#include "Test.h"
+#include <string.h>
+
+DEFINE_TEST(strlen)
+{
+    START_TEST(strlen);
+
+    const char* str = "Hello, World!";
+
+    size_t len = strlen(str);
+
+    EXPECT_EQ(len, 13);
+
+    char null[] = {'\0'};
+
+    len = strlen(null);
+
+    EXPECT_EQ(len, 0);
+
+    TEST_SUCCESS();
+}
\ No newline at end of file
diff --git a/tools/rebuild-and-run.sh b/tools/rebuild-and-run.sh
index 678c3f60..1ac23fa1 100755
--- a/tools/rebuild-and-run.sh
+++ b/tools/rebuild-and-run.sh
@@ -3,6 +3,8 @@
 set -e
 source $(dirname $0)/env.sh
 
+cd $LUNA_ROOT
+
 tools/rebuild-iso.sh
 
 qemu-system-x86_64 -cdrom Luna.iso -smp 1 -m 256M -serial stdio -enable-kvm $@
\ No newline at end of file
diff --git a/tools/run.sh b/tools/run.sh
index e1904c95..f2f3e326 100755
--- a/tools/run.sh
+++ b/tools/run.sh
@@ -3,6 +3,8 @@
 set -e
 source $(dirname $0)/env.sh
 
+cd $LUNA_ROOT
+
 tools/build-iso.sh
 
 qemu-system-x86_64 -cdrom Luna.iso -smp 1 -m 256M -serial stdio -enable-kvm $@
\ No newline at end of file
diff --git a/tools/test.sh b/tools/test.sh
new file mode 100755
index 00000000..d73fd091
--- /dev/null
+++ b/tools/test.sh
@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+set -e
+source $(dirname $0)/env.sh
+
+cd $LUNA_ROOT
+
+make -C tests build
+make -C tests install
+make -C tests test
\ No newline at end of file