diff --git a/tests/stm32/src/bin/gpio.rs b/tests/stm32/src/bin/gpio.rs
index f276ce7f4..51ede6cea 100644
--- a/tests/stm32/src/bin/gpio.rs
+++ b/tests/stm32/src/bin/gpio.rs
@@ -11,7 +11,7 @@ use embassy_stm32::Peripherals;
 use embedded_hal::digital::v2::{InputPin, OutputPin};
 use example_common::*;
 
-#[embassy::main]
+#[embassy::main(config = "config()")]
 async fn main(_spawner: Spawner, p: Peripherals) {
     info!("Hello World!");
 
@@ -34,12 +34,12 @@ async fn main(_spawner: Spawner, p: Peripherals) {
 
         {
             let _a = Output::new(&mut a, Level::Low, Speed::Low);
-            cortex_m::asm::delay(1000);
+            delay();
             assert!(b.is_low().unwrap());
         }
         {
             let _a = Output::new(&mut a, Level::High, Speed::Low);
-            cortex_m::asm::delay(1000);
+            delay();
             assert!(b.is_high().unwrap());
         }
     }
@@ -50,41 +50,48 @@ async fn main(_spawner: Spawner, p: Peripherals) {
         // no pull, the status is undefined
 
         let mut a = Output::new(&mut a, Level::Low, Speed::Low);
-        cortex_m::asm::delay(1000);
+        delay();
         assert!(b.is_low().unwrap());
         a.set_high().unwrap();
-        cortex_m::asm::delay(1000);
+        delay();
         assert!(b.is_high().unwrap());
     }
 
     // Test input pulldown
     {
         let b = Input::new(&mut b, Pull::Down);
-        cortex_m::asm::delay(1000);
+        delay();
         assert!(b.is_low().unwrap());
 
         let mut a = Output::new(&mut a, Level::Low, Speed::Low);
-        cortex_m::asm::delay(1000);
+        delay();
         assert!(b.is_low().unwrap());
         a.set_high().unwrap();
-        cortex_m::asm::delay(1000);
+        delay();
         assert!(b.is_high().unwrap());
     }
 
     // Test input pullup
     {
         let b = Input::new(&mut b, Pull::Up);
-        cortex_m::asm::delay(1000);
+        delay();
         assert!(b.is_high().unwrap());
 
         let mut a = Output::new(&mut a, Level::Low, Speed::Low);
-        cortex_m::asm::delay(1000);
+        delay();
         assert!(b.is_low().unwrap());
         a.set_high().unwrap();
-        cortex_m::asm::delay(1000);
+        delay();
         assert!(b.is_high().unwrap());
     }
 
     info!("Test OK");
     cortex_m::asm::bkpt();
 }
+
+fn delay() {
+    #[cfg(feature = "stm32h755zi")]
+    cortex_m::asm::delay(10000);
+    #[cfg(not(feature = "stm32h755zi"))]
+    cortex_m::asm::delay(1000);
+}
diff --git a/tests/stm32/src/bin/spi.rs b/tests/stm32/src/bin/spi.rs
new file mode 100644
index 000000000..043505c7b
--- /dev/null
+++ b/tests/stm32/src/bin/spi.rs
@@ -0,0 +1,46 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+#[path = "../example_common.rs"]
+mod example_common;
+use defmt::assert_eq;
+use embassy::executor::Spawner;
+use embassy_stm32::dma::NoDma;
+use embassy_stm32::spi::{self, Spi};
+use embassy_stm32::time::Hertz;
+use embassy_stm32::Peripherals;
+use embedded_hal::blocking::spi::Transfer;
+use example_common::*;
+
+#[embassy::main(config = "config()")]
+async fn main(_spawner: Spawner, p: Peripherals) {
+    info!("Hello World!");
+
+    #[cfg(not(feature = "stm32h755zi"))]
+    let (sck, mosi, miso) = (p.PA5, p.PA7, p.PA6);
+    #[cfg(feature = "stm32h755zi")]
+    let (sck, mosi, miso) = (p.PA5, p.PB5, p.PA6);
+
+    let mut spi = Spi::new(
+        p.SPI1,
+        sck,  // Arduino D13
+        mosi, // Arduino D11
+        miso, // Arduino D12
+        NoDma,
+        NoDma,
+        Hertz(1_000_000),
+        spi::Config::default(),
+    );
+
+    let data: [u8; 9] = [0x00, 0xFF, 0xAA, 0x55, 0xC0, 0xFF, 0xEE, 0xC0, 0xDE];
+
+    // Arduino pins D11 and D12 (MOSI-MISO) are connected together with a 1K resistor.
+    // so we should get the data we sent back.
+    let mut buf = data;
+    spi.transfer(&mut buf).unwrap();
+    assert_eq!(buf, data);
+
+    info!("Test OK");
+    cortex_m::asm::bkpt();
+}
diff --git a/tests/stm32/src/bin/timer.rs b/tests/stm32/src/bin/timer.rs
index de19a22e3..002a8a4d3 100644
--- a/tests/stm32/src/bin/timer.rs
+++ b/tests/stm32/src/bin/timer.rs
@@ -10,7 +10,7 @@ use embassy::time::{Duration, Instant, Timer};
 use embassy_stm32::Peripherals;
 use example_common::*;
 
-#[embassy::main]
+#[embassy::main(config = "config()")]
 async fn main(_spawner: Spawner, _p: Peripherals) {
     info!("Hello World!");
 
diff --git a/tests/stm32/src/example_common.rs b/tests/stm32/src/example_common.rs
index 54d633837..11b11d685 100644
--- a/tests/stm32/src/example_common.rs
+++ b/tests/stm32/src/example_common.rs
@@ -1,6 +1,9 @@
 #![macro_use]
 
-use defmt_rtt as _; // global logger
+use defmt_rtt as _;
+#[allow(unused)]
+use embassy_stm32::time::Hertz;
+use embassy_stm32::Config;
 use panic_probe as _;
 
 pub use defmt::*;
@@ -15,3 +18,16 @@ defmt::timestamp! {"{=u64}", {
         n as u64
     }
 }
+
+pub fn config() -> Config {
+    #[allow(unused_mut)]
+    let mut config = Config::default();
+
+    #[cfg(feature = "stm32h755zi")]
+    {
+        config.rcc.sys_ck = Some(Hertz(400_000_000));
+        config.rcc.pll1.q_ck = Some(Hertz(100_000_000));
+    }
+
+    config
+}