diff --git a/src/servers/udp/connection_cookie.rs b/src/servers/udp/connection_cookie.rs
index a389388a7..4dc9896ab 100644
--- a/src/servers/udp/connection_cookie.rs
+++ b/src/servers/udp/connection_cookie.rs
@@ -314,7 +314,7 @@ mod tests {
     }
 
     #[test]
-    #[should_panic]
+    #[should_panic = "InvalidConnectionId"]
     fn it_should_be_not_valid_after_their_last_time_extent() {
         let remote_address = SocketAddr::new(IpAddr::V4(Ipv4Addr::UNSPECIFIED), 0);
 
diff --git a/src/tracker/peer.rs b/src/tracker/peer.rs
index 76747fea2..de9bacc10 100644
--- a/src/tracker/peer.rs
+++ b/src/tracker/peer.rs
@@ -363,14 +363,14 @@ mod test {
         }
 
         #[test]
-        #[should_panic]
+        #[should_panic = "assertion `left == right` failed"]
         fn should_fail_trying_to_instantiate_from_a_byte_slice_with_less_than_20_bytes() {
             let less_than_20_bytes = [0; 19];
             let _: peer::Id = peer::Id::from_bytes(&less_than_20_bytes);
         }
 
         #[test]
-        #[should_panic]
+        #[should_panic = "assertion `left == right` failed"]
         fn should_fail_trying_to_instantiate_from_a_byte_slice_with_more_than_20_bytes() {
             let more_than_20_bytes = [0; 21];
             let _: peer::Id = peer::Id::from_bytes(&more_than_20_bytes);
@@ -418,13 +418,13 @@ mod test {
         }
 
         #[test]
-        #[should_panic]
+        #[should_panic = "NotEnoughBytes"]
         fn should_fail_trying_to_convert_from_a_byte_vector_with_less_than_20_bytes() {
             let _: peer::Id = peer::Id::try_from([0; 19].to_vec()).unwrap();
         }
 
         #[test]
-        #[should_panic]
+        #[should_panic = "TooManyBytes"]
         fn should_fail_trying_to_convert_from_a_byte_vector_with_more_than_20_bytes() {
             let _: peer::Id = peer::Id::try_from([0; 21].to_vec()).unwrap();
         }
diff --git a/tests/servers/api/v1/contract/configuration.rs b/tests/servers/api/v1/contract/configuration.rs
index e4b608607..9ed257c51 100644
--- a/tests/servers/api/v1/contract/configuration.rs
+++ b/tests/servers/api/v1/contract/configuration.rs
@@ -3,7 +3,7 @@ use torrust_tracker_test_helpers::configuration;
 use crate::servers::api::test_environment::stopped_test_environment;
 
 #[tokio::test]
-#[should_panic]
+#[should_panic = "Could not receive bind_address."]
 async fn should_fail_with_ssl_enabled_and_bad_ssl_config() {
     let mut test_env = stopped_test_environment(configuration::ephemeral());