diff --git a/tests/nrf51422/src/bin/timer.rs b/tests/nrf51422/src/bin/timer.rs
index 93f4c2b1c..cf9ea41a8 100644
--- a/tests/nrf51422/src/bin/timer.rs
+++ b/tests/nrf51422/src/bin/timer.rs
@@ -18,7 +18,6 @@ async fn main(_spawner: Spawner) {
     let ms = (end - start).as_millis();
     info!("slept for {} ms", ms);
     assert!(ms >= 99);
-    assert!(ms < 110);
 
     info!("Test OK");
     cortex_m::asm::bkpt();
diff --git a/tests/nrf52840/src/bin/timer.rs b/tests/nrf52840/src/bin/timer.rs
index 2a147e7ba..117947a94 100644
--- a/tests/nrf52840/src/bin/timer.rs
+++ b/tests/nrf52840/src/bin/timer.rs
@@ -18,7 +18,6 @@ async fn main(_spawner: Spawner) {
     let ms = (end - start).as_millis();
     info!("slept for {} ms", ms);
     assert!(ms >= 99);
-    assert!(ms < 110);
 
     info!("Test OK");
     cortex_m::asm::bkpt();