diff --git a/src/hack.rs b/src/hack.rs
deleted file mode 100644
index 21a3427..0000000
--- a/src/hack.rs
+++ /dev/null
@@ -1,20 +0,0 @@
-#[no_mangle]
-extern "C" fn fmod(x: f64, _y: f64) -> f64 { unimplemented!(); }
-
-#[no_mangle]
-extern "C" fn fmodf(x: f32, _y: f32) -> f32 { unimplemented!(); }
-
-#[no_mangle]
-extern "C" fn fmin(x: f64, _y: f64) -> f64 { unimplemented!(); }
-
-#[no_mangle]
-extern "C" fn fminf(x: f32, _y: f32) -> f32 { unimplemented!(); }
-
-#[no_mangle]
-extern "C" fn fmax(x: f64, _y: f64) -> f64 { unimplemented!(); }
-
-#[no_mangle]
-extern "C" fn fmaxf(x: f32, _y: f32) -> f32 { unimplemented!(); }
-
-#[no_mangle]
-extern "C" fn __truncdfsf2(x: f64) -> f32 { unimplemented!(); }
diff --git a/src/lib.rs b/src/lib.rs
index cfc99e0..09387a8 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -30,11 +30,13 @@ use core::panic::PanicInfo;
 use bootloader::BootInfo;
 
 pub fn init(boot_info: &'static BootInfo) {
+    println!("XeOS booting");
     gdt::init();
     interrupts::init_idt();
     unsafe { interrupts::PICS.lock().initialize() };
     x86_64::instructions::interrupts::enable();
     allocator::init(&boot_info);
+    println!("XeOS booted");
 }
 
 pub fn hlt_loop() -> ! {
diff --git a/src/main.rs b/src/main.rs
index 1633f97..56675c3 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -5,18 +5,16 @@
 #![reexport_test_harness_main = "test_main"]
 
 extern crate alloc;
-mod hack;
 
 use bootloader::{entry_point, BootInfo};
 use core::panic::PanicInfo;
-use xe_os::{print, println};
+use xe_os::println;
 
 entry_point!(kernel_main);
 
 fn kernel_main(boot_info: &'static BootInfo) -> ! {
     println!("booted");
     xe_os::init(&boot_info);
-    println!("Hello World{}", "!");
 
     #[cfg(test)]
     test_main();
diff --git a/src/wasm/hack.rs b/src/wasm/hack.rs
new file mode 100644
index 0000000..1c1cc2b
--- /dev/null
+++ b/src/wasm/hack.rs
@@ -0,0 +1,20 @@
+#[no_mangle]
+extern "C" fn fmod(_x: f64, _y: f64) -> f64 { unimplemented!(); }
+
+#[no_mangle]
+extern "C" fn fmodf(_x: f32, _y: f32) -> f32 { unimplemented!(); }
+
+#[no_mangle]
+extern "C" fn fmin(_x: f64, _y: f64) -> f64 { unimplemented!(); }
+
+#[no_mangle]
+extern "C" fn fminf(_x: f32, _y: f32) -> f32 { unimplemented!(); }
+
+#[no_mangle]
+extern "C" fn fmax(_x: f64, _y: f64) -> f64 { unimplemented!(); }
+
+#[no_mangle]
+extern "C" fn fmaxf(_x: f32, _y: f32) -> f32 { unimplemented!(); }
+
+#[no_mangle]
+extern "C" fn __truncdfsf2(_x: f64) -> f32 { unimplemented!(); }
diff --git a/src/wasm/mod.rs b/src/wasm/mod.rs
index 36c98cd..e2a80ac 100644
--- a/src/wasm/mod.rs
+++ b/src/wasm/mod.rs
@@ -1,10 +1,15 @@
 use wasmi::{
-        Error as InterpreterError, Externals, FuncInstance, FuncRef, HostError, ImportsBuilder,
-        ModuleImportResolver, ModuleInstance, ModuleRef, RuntimeArgs, RuntimeValue, Signature, Trap,
+        Error as InterpreterError, Externals, FuncInstance, FuncRef, ImportsBuilder,
+        ModuleImportResolver, ModuleInstance, RuntimeArgs, RuntimeValue, Signature, Trap,
         ValueType,
     };
 use crate::{print, println};
 
+#[cfg(test)]
+use crate::{serial_print, serial_println};
+
+mod hack;
+
 pub fn run() {
     use alloc::vec::Vec;
 
@@ -24,6 +29,13 @@ pub fn run() {
     let _ = instance.invoke_export("h", &[], &mut H);
 }
 
+#[test_case]
+fn test_wasm() {
+    serial_print!("running h example... ");
+    run();
+    serial_println!("[ok]");
+}
+
 struct H;
 const H_FUNC: usize = 0;
 
diff --git a/tests/heap_allocation.rs b/tests/heap_allocation.rs
index 01b6fab..54fc436 100644
--- a/tests/heap_allocation.rs
+++ b/tests/heap_allocation.rs
@@ -12,10 +12,6 @@ use core::panic::PanicInfo;
 entry_point!(main);
 
 fn main(boot_info: &'static BootInfo) -> ! {
-    use xe_os::allocator;
-    use xe_os::memory::{self, BootInfoFrameAllocator};
-    use x86_64::VirtAddr;
-
     xe_os::init(boot_info);
 
     test_main();