diff --git a/xmpp-parsers/src/carbons.rs b/xmpp-parsers/src/carbons.rs
index 43047c2..caf8635 100644
--- a/xmpp-parsers/src/carbons.rs
+++ b/xmpp-parsers/src/carbons.rs
@@ -124,4 +124,14 @@ mod tests {
         let sent = Sent::try_from(elem).unwrap();
         assert!(sent.forwarded.stanza.is_some());
     }
+
+    #[test]
+    fn test_serialize_received() {
+        assert!(false);
+    }
+
+    #[test]
+    fn test_serialize_sent() {
+        assert!(false);
+    }
 }
diff --git a/xmpp-parsers/src/cert_management.rs b/xmpp-parsers/src/cert_management.rs
index 106b160..9478b02 100644
--- a/xmpp-parsers/src/cert_management.rs
+++ b/xmpp-parsers/src/cert_management.rs
@@ -227,4 +227,24 @@ mod tests {
         assert!(elem.is("name", ns::SASL_CERT));
         assert_eq!(elem.text(), "Mobile Client");
     }
+
+    #[test]
+    fn test_serialize_item() {
+        assert!(false);
+    }
+
+    #[test]
+    fn test_serialize_append() {
+        assert!(false);
+    }
+
+    #[test]
+    fn test_serialize_disable() {
+        assert!(false);
+    }
+
+    #[test]
+    fn test_serialize_revoke() {
+        assert!(false);
+    }
 }
diff --git a/xmpp-parsers/src/forwarding.rs b/xmpp-parsers/src/forwarding.rs
index 6517d22..f51c6bb 100644
--- a/xmpp-parsers/src/forwarding.rs
+++ b/xmpp-parsers/src/forwarding.rs
@@ -71,4 +71,9 @@ mod tests {
         let elem2 = forwarded.into();
         assert_eq!(elem, elem2);
     }
+
+    #[test]
+    fn test_serialize_with_delay_and_stanza() {
+        assert!(false);
+    }
 }
diff --git a/xmpp-parsers/src/jingle_ice_udp.rs b/xmpp-parsers/src/jingle_ice_udp.rs
index 1f5dada..72a18c7 100644
--- a/xmpp-parsers/src/jingle_ice_udp.rs
+++ b/xmpp-parsers/src/jingle_ice_udp.rs
@@ -192,4 +192,9 @@ mod tests {
             ]
         );
     }
+
+    #[test]
+    fn test_serialize_transport() {
+        assert!(false);
+    }
 }
diff --git a/xmpp-parsers/src/mam.rs b/xmpp-parsers/src/mam.rs
index a644cef..7799dea 100644
--- a/xmpp-parsers/src/mam.rs
+++ b/xmpp-parsers/src/mam.rs
@@ -421,4 +421,14 @@ mod tests {
         let serialized: Element = foo.into();
         assert_eq!(serialized, reference);
     }
+
+    #[test]
+    fn test_serialize_result() {
+        assert!(false);
+    }
+
+    #[test]
+    fn test_serialize_fin() {
+        assert!(false);
+    }
 }
diff --git a/xmpp-parsers/src/muc/muc.rs b/xmpp-parsers/src/muc/muc.rs
index ef5186d..02e849c 100644
--- a/xmpp-parsers/src/muc/muc.rs
+++ b/xmpp-parsers/src/muc/muc.rs
@@ -191,4 +191,9 @@ mod tests {
             DateTime::from_str("1970-01-01T00:00:00+00:00").unwrap()
         );
     }
+
+    #[test]
+    fn test_serialize_muc_history() {
+        assert!(false);
+    }
 }
diff --git a/xmpp-parsers/src/muc/user.rs b/xmpp-parsers/src/muc/user.rs
index bcb997e..35cd126 100644
--- a/xmpp-parsers/src/muc/user.rs
+++ b/xmpp-parsers/src/muc/user.rs
@@ -687,4 +687,9 @@ mod tests {
             Item { reason, .. } => assert_eq!(reason, Some(Reason("foobar".to_owned()))),
         }
     }
+
+    #[test]
+    fn test_serialize_item() {
+        assert!(false);
+    }
 }
diff --git a/xmpp-parsers/src/openpgp.rs b/xmpp-parsers/src/openpgp.rs
index f0cb892..6ee88cc 100644
--- a/xmpp-parsers/src/openpgp.rs
+++ b/xmpp-parsers/src/openpgp.rs
@@ -98,4 +98,9 @@ mod tests {
         };
         println!("Foo2: {:?}", pubsub);
     }
+
+    #[test]
+    fn test_serialize_pubkey() {
+        assert!(false);
+    }
 }
diff --git a/xmpp-parsers/src/pubsub/pubsub.rs b/xmpp-parsers/src/pubsub/pubsub.rs
index 13184f6..c62ed94 100644
--- a/xmpp-parsers/src/pubsub/pubsub.rs
+++ b/xmpp-parsers/src/pubsub/pubsub.rs
@@ -689,4 +689,24 @@ mod tests {
         let subscribe_options2 = SubscribeOptions::try_from(elem2).unwrap();
         assert_eq!(subscribe_options2.required, true);
     }
+
+    #[test]
+    fn test_serialize_configure() {
+        assert!(false);
+    }
+
+    #[test]
+    fn test_serialize_options() {
+        assert!(false);
+    }
+
+    #[test]
+    fn test_serialize_publish_options() {
+        assert!(false);
+    }
+
+    #[test]
+    fn test_serialize_subscriptions() {
+        assert!(false);
+    }
 }
diff --git a/xmpp-parsers/src/sm.rs b/xmpp-parsers/src/sm.rs
index a78320f..d84b188 100644
--- a/xmpp-parsers/src/sm.rs
+++ b/xmpp-parsers/src/sm.rs
@@ -224,4 +224,9 @@ mod tests {
         assert_eq!(resumed.h, 5);
         assert_eq!(resumed.previd, previd);
     }
+
+    #[test]
+    fn test_serialize_failed() {
+        assert!(false);
+    }
 }