diff --git a/Cargo.toml b/Cargo.toml
index 408fd74..5b7bef3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -36,4 +36,3 @@ test-args = [
   "none",
 ]
 test-success-exit-code = 33 # (0x10 << 1) | 1 = 33
-test-timeout = "300" # in seconds
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..727bdfe
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,75 @@
+#![no_std]
+#![cfg_attr(test, no_main)]
+#![feature(custom_test_frameworks)]
+#![test_runner(crate::test_runner)]
+#![reexport_test_harness_main = "test_main"]
+
+use core::panic::PanicInfo;
+
+pub mod vga_buffer;
+pub mod serial;
+
+pub trait Testable {
+    fn run(&self) -> ();
+}
+
+impl<T> Testable for T
+where
+    T: Fn(),
+{
+    fn run(&self) -> () {
+        serial_print!("{}...\t", core::any::type_name::<T>());
+        self();
+        serial_println!("[ok]");
+    }
+}
+
+pub fn test_runner(tests: &[&dyn Testable]) {
+    serial_println!("Running {} tests", tests.len());
+
+    for test in tests {
+        test.run();
+    }
+
+    exit_qemu(QemuExitCode::Success);
+}
+
+pub fn test_panic_handler(info: &PanicInfo) -> ! {
+    serial_println!("[failed]\n");
+    serial_println!("Error: {}\n", info);
+    exit_qemu(QemuExitCode::Failed);
+
+    loop {}
+}
+
+/// entry point for `cargo test`
+#[cfg(test)]
+#[unsafe(no_mangle)]
+pub extern "C" fn _start() -> ! {
+    test_main();
+    
+    loop {}
+}
+
+#[cfg(test)]
+#[panic_handler]
+fn panic(info: &PanicInfo) -> ! {
+    test_panic_handler(info)
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+#[repr(u32)]
+pub enum QemuExitCode {
+    Success = 0x10,
+    Failed = 0x11,
+}
+
+pub fn exit_qemu(exit_code: QemuExitCode) {
+    use x86_64::instructions::port::Port;
+
+    unsafe {
+        let mut port = Port::new(0xF4);
+        port.write(exit_code as u32);
+    }
+}
+
diff --git a/src/main.rs b/src/main.rs
index 3a03d35..579ad9c 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,47 +1,15 @@
 #![no_std] // dont link the standard library
 #![no_main] // disable all rust-level entry points
 #![feature(custom_test_frameworks)]
-#![test_runner(crate::test_runner)]
+#![test_runner(totos::test_runner)]
 #![reexport_test_harness_main = "test_main"]
 
 use core::panic::PanicInfo;
+use totos::println;
 
-mod vga_buffer;
-mod serial;
-
-pub trait Testable {
-    fn run(&self) -> ();
-}
-
-impl<T> Testable for T
-where
-    T: Fn(),
-{
-    fn run(&self) -> () {
-        serial_print!("{}...\t", core::any::type_name::<T>());
-        self();
-        serial_println!("[ok]");
-    }
-}
-
+// this is here because i dont want to remove it :>
 static HELLO: &[u8] = b"Hello toto :3";
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-#[repr(u32)]
-pub enum QemuExitCode {
-    Success = 0x10,
-    Failed = 0x11,
-}
-
-pub fn exit_qemu(exit_code: QemuExitCode) {
-    use x86_64::instructions::port::Port;
-
-    unsafe {
-        let mut port = Port::new(0xF4);
-        port.write(exit_code as u32);
-    }
-}
-
 // this function is the entry point since the linker
 // looks for a function named `_start` by default
 #[unsafe(no_mangle)]
@@ -54,7 +22,7 @@ pub extern "C" fn _start() -> ! {
     loop {}
 }
 
-// panic handler
+/// this function is called on panic
 #[cfg(not(test))]
 #[panic_handler]
 fn panic(info: &PanicInfo) -> ! {
@@ -63,26 +31,10 @@ fn panic(info: &PanicInfo) -> ! {
     loop {}
 }
 
-// panic handler in test mode
 #[cfg(test)]
 #[panic_handler]
 fn panic(info: &PanicInfo) -> ! {
-    serial_println!("[failed]\n");
-    serial_println!("Error: {}\n", info);
-    exit_qemu(QemuExitCode::Failed);
-
-    loop {}
-}
-
-#[cfg(test)]
-pub fn test_runner(tests: &[&dyn Testable]) {
-    serial_println!("Running {} tests", tests.len());
-
-    for test in tests {
-        test.run();
-    }
-
-    exit_qemu(QemuExitCode::Success);
+    totos::test_panic_handler(info)
 }
 
 #[test_case]
diff --git a/tests/basic_boot.rs b/tests/basic_boot.rs
new file mode 100644
index 0000000..79ce882
--- /dev/null
+++ b/tests/basic_boot.rs
@@ -0,0 +1,25 @@
+#![no_std]
+#![no_main]
+#![feature(custom_test_frameworks)]
+#![test_runner(totos::test_runner)]
+#![reexport_test_harness_main = "test_main"]
+
+use core::panic::PanicInfo;
+use totos::println;
+
+#[unsafe(no_mangle)]
+pub extern "C" fn _start() -> ! {
+    test_main();
+
+    loop {}
+}
+
+#[panic_handler]
+fn panic(info: &PanicInfo) -> ! {
+    totos::test_panic_handler(info)
+}
+
+#[test_case]
+fn test_println() {
+    println!("test_println_output");
+}