diff --git a/src/error.rs b/src/error.rs
index c558ebbac9..12fca8b9c4 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -206,10 +206,6 @@ impl fmt::Display for Error {
             write!(f, " for url ({url})")?;
         }
 
-        if let Some(e) = &self.inner.source {
-            write!(f, ": {e}")?;
-        }
-
         Ok(())
     }
 }
diff --git a/src/into_url.rs b/src/into_url.rs
index a46ae57021..d463e04ba9 100644
--- a/src/into_url.rs
+++ b/src/into_url.rs
@@ -89,7 +89,7 @@ mod tests {
     fn into_url_file_scheme() {
         let err = "file:///etc/hosts".into_url().unwrap_err();
         assert_eq!(
-            err.to_string(),
+            err.source().unwrap().to_string(),
             "builder error for url (file:///etc/hosts): URL scheme is not allowed"
         );
     }
@@ -98,7 +98,7 @@ mod tests {
     fn into_url_blob_scheme() {
         let err = "blob:https://example.com".into_url().unwrap_err();
         assert_eq!(
-            err.to_string(),
+            err.source().unwrap().to_string(),
             "builder error for url (blob:https://example.com): URL scheme is not allowed"
         );
     }