diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 3ddca01..d2f93d4 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -191,6 +191,10 @@ jobs:
     workingDirectory: example-kernels/runner
     displayName: 'Run `cargo xrun` for "runner" kernel'
 
+  - script: cargo xtest -Z doctest-xcompile
+    workingDirectory: example-kernels/runner-doctest
+    displayName: 'Run `cargo xtest -Z doctest-xcompile` for "runner-doctest" kernel'
+
   - script: cargo xtest
     workingDirectory: example-kernels/runner-test
     displayName: 'Run `cargo xtest` for "runner-test" kernel'
diff --git a/example-kernels/Cargo.lock b/example-kernels/Cargo.lock
index 8549198..c04784c 100644
--- a/example-kernels/Cargo.lock
+++ b/example-kernels/Cargo.lock
@@ -12,7 +12,7 @@ dependencies = [
 name = "basic"
 version = "0.1.0"
 dependencies = [
- "bootloader 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bootloader 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "x86_64 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -28,14 +28,13 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "bootloader"
-version = "0.5.3"
+version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "fixedvec 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "font8x8 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "llvm-tools 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "usize_conversions 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "x86_64 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "x86_64 0.7.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "xmas-elf 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -53,7 +52,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 name = "default-target-bootimage"
 version = "0.1.0"
 dependencies = [
- "bootloader 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bootloader 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "x86_64 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -61,7 +60,7 @@ dependencies = [
 name = "default-target-cargo"
 version = "0.1.0"
 dependencies = [
- "bootloader 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bootloader 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "x86_64 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -73,11 +72,6 @@ dependencies = [
  "skeptic 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "font8x8"
-version = "0.2.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "fuchsia-cprng"
 version = "0.1.1"
@@ -182,7 +176,15 @@ dependencies = [
 name = "runner"
 version = "0.1.0"
 dependencies = [
- "bootloader 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bootloader 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "x86_64 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "runner-doctest"
+version = "0.1.0"
+dependencies = [
+ "bootloader 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "x86_64 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -190,7 +192,7 @@ dependencies = [
 name = "runner-test"
 version = "0.1.0"
 dependencies = [
- "bootloader 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bootloader 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "x86_64 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -247,7 +249,7 @@ dependencies = [
 name = "testing-qemu-exit-code"
 version = "0.1.0"
 dependencies = [
- "bootloader 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bootloader 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "x86_64 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -255,7 +257,7 @@ dependencies = [
 name = "testing-serial-result"
 version = "0.1.0"
 dependencies = [
- "bootloader 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bootloader 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "spin 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "uart_16550 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -319,27 +321,26 @@ dependencies = [
 
 [[package]]
 name = "x86_64"
-version = "0.3.6"
+version = "0.5.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "array-init 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "bit_field 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "os_bootinfo 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "usize_conversions 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cast 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "raw-cpuid 6.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "ux 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "x86_64"
-version = "0.5.5"
+version = "0.7.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "array-init 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "bit_field 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "cast 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "raw-cpuid 6.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "ux 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -360,11 +361,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum array-init 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "23589ecb866b460d3a0f1278834750268c607e8e28a1b982c907219f3178cd72"
 "checksum bit_field 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ed8765909f9009617974ab6b7d332625b320b33c326b1e9321382ef1999b5d56"
 "checksum bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3d155346769a6855b86399e9bc3814ab343cd3d62c7e985113d46a0ec3c281fd"
-"checksum bootloader 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a8f7c11b70b5781deec899276f7d67611eaf296a8bd7dcc9b9d37c71a5389c52"
+"checksum bootloader 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)" = "b15e5b7b9d9a8e427cf4270894f51ce288632a3a1a2cc6f8fda669d5446f98bd"
 "checksum cast 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "926013f2860c46252efceabb19f4a6b308197505082c609025aa6706c011d427"
 "checksum cc 1.0.37 (registry+https://github.com/rust-lang/crates.io-index)" = "39f75544d7bbaf57560d2168f28fd649ff9c76153874db88bdbdfd839b1a7e7d"
 "checksum fixedvec 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "7c6c16d316ccdac21a4dd648e314e76facbbaf316e83ca137d0857a9c07419d0"
-"checksum font8x8 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)" = "44226c40489fb1d602344a1d8f1b544570c3435e396dda1eda7b5ef010d8f1be"
 "checksum fuchsia-cprng 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"
 "checksum getopts 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)" = "72327b15c228bfe31f1390f93dd5e9279587f0463836393c9df719ce62a3e450"
 "checksum lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "bc5729f27f159ddd61f4df6228e827e86643d4d3e7c32183cb30a1c08f604a14"
@@ -394,7 +394,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 "checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 "checksum x86_64 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)" = "2bd647af1614659e1febec1d681231aea4ebda4818bf55a578aff02f3e4db4b4"
-"checksum x86_64 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "f9258d7e2dd25008d69e8c9e9ee37865887a5e1e3d06a62f1cb3f6c209e6f177"
 "checksum x86_64 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)" = "bb8f09c32a991cc758ebcb9b7984f530095d32578a4e7b85db6ee1f0bbe4c9c6"
+"checksum x86_64 0.7.7 (registry+https://github.com/rust-lang/crates.io-index)" = "1f27d9168654aee1b0c1b73746caeb4aa33248f8b8c8f6e100e697fcc2a794b2"
 "checksum xmas-elf 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)" = "22678df5df766e8d1e5d609da69f0c3132d794edf6ab5e75e7abcd2270d4cf58"
 "checksum zero 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "5f1bc8a6b2005884962297587045002d8cfb8dcec9db332f4ca216ddc5de82c5"
diff --git a/example-kernels/Cargo.toml b/example-kernels/Cargo.toml
index ee84626..e2ee131 100644
--- a/example-kernels/Cargo.toml
+++ b/example-kernels/Cargo.toml
@@ -4,6 +4,7 @@ members = [
     "default-target-bootimage",
     "default-target-cargo",
     "runner",
+    "runner-doctest",
     "runner-test",
     "testing-qemu-exit-code",
     "testing-serial-result",
diff --git a/example-kernels/runner-doctest/.cargo/config b/example-kernels/runner-doctest/.cargo/config
new file mode 100644
index 0000000..3b4d89e
--- /dev/null
+++ b/example-kernels/runner-doctest/.cargo/config
@@ -0,0 +1,5 @@
+[build]
+target = "../x86_64-bootimage-example-kernels.json"
+
+[target.'cfg(target_os = "none")']
+runner = "bootimage runner"
diff --git a/example-kernels/runner-doctest/.gitignore b/example-kernels/runner-doctest/.gitignore
new file mode 100644
index 0000000..eccd7b4
--- /dev/null
+++ b/example-kernels/runner-doctest/.gitignore
@@ -0,0 +1,2 @@
+/target/
+**/*.rs.bk
diff --git a/example-kernels/runner-doctest/Cargo.toml b/example-kernels/runner-doctest/Cargo.toml
new file mode 100644
index 0000000..d3c440f
--- /dev/null
+++ b/example-kernels/runner-doctest/Cargo.toml
@@ -0,0 +1,13 @@
+[package]
+name = "runner-doctest"
+version = "0.1.0"
+authors = ["Philipp Oppermann <dev@phil-opp.com>"]
+edition = "2018"
+
+[dependencies]
+bootloader = "0.6.4"
+x86_64 = "0.5.3"
+
+[package.metadata.bootimage]
+test-success-exit-code = 33 # (0x10 << 1) | 1
+test-args = ["-device", "isa-debug-exit,iobase=0xf4,iosize=0x04", "-display", "none"]
diff --git a/example-kernels/runner-doctest/src/lib.rs b/example-kernels/runner-doctest/src/lib.rs
new file mode 100644
index 0000000..df474a2
--- /dev/null
+++ b/example-kernels/runner-doctest/src/lib.rs
@@ -0,0 +1,84 @@
+#![no_std]
+#![cfg_attr(test, no_main)]
+
+#![feature(custom_test_frameworks)]
+#![test_runner(crate::test_runner)]
+#![reexport_test_harness_main = "test_main"]
+
+/// add two numbers
+///
+/// ```
+/// #![no_std]
+/// #![no_main]
+/// use runner_doctest::{add, exit_qemu, ExitCode};
+/// #[export_name = "_start"]
+/// extern "C" fn main() {
+///     assert_eq!(add(1, 2), 3);
+///     unsafe { exit_qemu(ExitCode::Success); }
+/// }
+/// ```
+pub fn add(a: u32, b: u32) -> u32 {
+    a + b
+}
+
+/// multiply two numbers
+///
+/// ```
+/// #![no_std]
+/// #![no_main]
+/// use runner_doctest::{mul, exit_qemu, ExitCode};
+/// #[export_name = "_start"]
+/// extern "C" fn main() {
+///     assert_eq!(mul(2, 3), 6);
+///     unsafe { exit_qemu(ExitCode::Success); }
+/// }
+/// ```
+pub fn mul(a: u32, b: u32) -> u32 {
+    a * b
+}
+
+fn test_runner(tests: &[&dyn Fn()]) {
+    for test in tests.iter() {
+        test();
+    }
+
+    unsafe { exit_qemu(ExitCode::Success); }
+}
+
+pub enum ExitCode {
+    Success,
+    Failed
+}
+
+impl ExitCode {
+    fn code(&self) -> u32 {
+        match self {
+            ExitCode::Success => 0x10,
+            ExitCode::Failed => 0x11,
+        }
+    }
+}
+
+/// exit QEMU (see https://os.phil-opp.com/integration-tests/#shutting-down-qemu)
+pub unsafe fn exit_qemu(exit_code: ExitCode) {
+    use x86_64::instructions::port::Port;
+
+    let mut port = Port::<u32>::new(0xf4);
+    port.write(exit_code.code());
+}
+
+#[cfg(test)]
+#[no_mangle]
+pub extern "C" fn _start() -> ! {
+    test_main();
+
+    unsafe { exit_qemu(ExitCode::Failed); }
+
+    loop {}
+}
+
+#[panic_handler]
+fn panic(_info: &core::panic::PanicInfo) -> ! {
+    unsafe { exit_qemu(ExitCode::Failed); }
+    loop {}
+}