diff --git a/src/icm20689.rs b/src/icm20689.rs
index d3eace0c9..96dda56a3 100644
--- a/src/icm20689.rs
+++ b/src/icm20689.rs
@@ -125,7 +125,7 @@ mod tests {
     fn test_icm20689_pi_4() {
         let mut imu = Icm20689Device::builder()
             .build()
-            .expect("Failed to build ICM20689: {error:?}");
+            .expect("Failed to build ICM20689");
         for _ in 0..10 {
             println!("ICM20689 gyroscope: {:?}", imu.read_angular_velocity());
             println!("ICM20689 accelerometers: {:?}", imu.read_acceleration());
diff --git a/src/leak.rs b/src/leak.rs
index 3fb8e2290..1969f3f1c 100644
--- a/src/leak.rs
+++ b/src/leak.rs
@@ -84,7 +84,7 @@ mod tests {
     fn test_leak_pi_4() {
         let leak = LeakDetector::builder()
             .build()
-            .expect("Failed to build leak detector: {error:?}");
+            .expect("Failed to build leak detector");
         for _ in 0..10 {
             println!("Leak detector: {}", leak.is_leak_detected().unwrap());
             sleep(Duration::from_millis(1000));
diff --git a/src/pca9685.rs b/src/pca9685.rs
index 846eac117..0a67cc2d5 100644
--- a/src/pca9685.rs
+++ b/src/pca9685.rs
@@ -210,7 +210,7 @@ mod tests {
             for channel in 0..16 {
                 println!("PCA9685: Channel {channel} value {duty_cycle:.1}");
                 pwm.set_duty_cycle(channel, duty_cycle)
-                    .expect("Error in setting duty cycle: {error:?}");
+                    .expect("Error in setting duty cycle");
                 sleep(Duration::from_millis(100));
             }
         }