diff --git a/src/eh0/error.rs b/src/eh0/error.rs
index 43f2e0b..9a7b82d 100644
--- a/src/eh0/error.rs
+++ b/src/eh0/error.rs
@@ -3,6 +3,9 @@ use std::{error::Error as StdError, fmt, io};
 /// Errors that may occur during mocking.
 #[derive(PartialEq, Eq, Clone, Debug)]
 pub enum MockError {
+    /// An error occurred without any details.
+    NoDetails,
+
     /// An I/O-Error occurred
     Io(io::ErrorKind),
 }
@@ -16,6 +19,7 @@ impl From<io::Error> for MockError {
 impl fmt::Display for MockError {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         match self {
+            MockError::NoDetails => write!(f, "An error occurred without any details"),
             MockError::Io(kind) => write!(f, "I/O error: {:?}", kind),
         }
     }
diff --git a/src/eh1/error.rs b/src/eh1/error.rs
index c14d2f2..873c6a8 100644
--- a/src/eh1/error.rs
+++ b/src/eh1/error.rs
@@ -6,6 +6,9 @@ use embedded_hal::digital::ErrorKind::{self, Other};
 /// Errors that may occur during mocking.
 #[derive(PartialEq, Eq, Clone, Debug)]
 pub enum MockError {
+    /// An error occurred without any details.
+    NoDetails,
+
     /// An I/O-Error occurred
     Io(io::ErrorKind),
 }
@@ -25,6 +28,7 @@ impl From<io::Error> for MockError {
 impl fmt::Display for MockError {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         match self {
+            MockError::NoDetails => write!(f, "An error occurred without any details"),
             MockError::Io(kind) => write!(f, "I/O error: {:?}", kind),
         }
     }