diff --git a/src/mariadb/protocol/binary/com_stmt_close.rs b/src/mariadb/protocol/binary/com_stmt_close.rs
index a5508069..75b99605 100644
--- a/src/mariadb/protocol/binary/com_stmt_close.rs
+++ b/src/mariadb/protocol/binary/com_stmt_close.rs
@@ -31,7 +31,7 @@ mod tests {
     fn it_encodes_com_stmt_close() {
         let mut buf = Vec::new();
 
-        ComStmtClose { statement_id: 1 }.encode(&mut buf);
+        ComStmtClose { statement_id: 1 }.encode(&mut buf, Capabilities::empty());
 
         assert_eq!(&buf[..], b"\x19\x01\0\0\0");
     }
diff --git a/src/mariadb/protocol/binary/com_stmt_fetch.rs b/src/mariadb/protocol/binary/com_stmt_fetch.rs
index 1013f0f2..f63c7a30 100644
--- a/src/mariadb/protocol/binary/com_stmt_fetch.rs
+++ b/src/mariadb/protocol/binary/com_stmt_fetch.rs
@@ -39,6 +39,6 @@ mod tests {
         }
         .encode(&mut buf, Capabilities::empty());
 
-        assert_eq!(&buf[..], b"\x09\0\0\x00\x1C\x01\0\0\0\x0A\0\0\0");
+        assert_eq!(&buf[..], b"\x1C\x01\0\0\0\x0A\0\0\0");
     }
 }
diff --git a/src/mariadb/protocol/binary/com_stmt_prepare.rs b/src/mariadb/protocol/binary/com_stmt_prepare.rs
index b3e6421e..23706b5b 100644
--- a/src/mariadb/protocol/binary/com_stmt_prepare.rs
+++ b/src/mariadb/protocol/binary/com_stmt_prepare.rs
@@ -34,9 +34,6 @@ mod tests {
         }
         .encode(&mut buf, Capabilities::empty());
 
-        assert_eq!(
-            &buf[..],
-            "\x27\0\0\x00\x16SELECT * FROM users WHERE username = ?"
-        );
+        assert_eq!(&buf[..], &b"\x16SELECT * FROM users WHERE username = ?"[..]);
     }
 }
diff --git a/src/mariadb/protocol/binary/com_stmt_reset.rs b/src/mariadb/protocol/binary/com_stmt_reset.rs
index e9f1f305..376b2c8f 100644
--- a/src/mariadb/protocol/binary/com_stmt_reset.rs
+++ b/src/mariadb/protocol/binary/com_stmt_reset.rs
@@ -29,6 +29,6 @@ mod tests {
 
         ComStmtReset { statement_id: 1 }.encode(&mut buf, Capabilities::empty());
 
-        assert_eq!(&buf[..], b"\x05\0\0\x00\x1A\x01\0\0\0");
+        assert_eq!(&buf[..], b"\x1A\x01\0\0\0");
     }
 }