diff --git a/packages/mysql/test-d/index.test-d.ts b/packages/mysql/test-d/index.test-d.ts
index ff88e10f..bbff2a8f 100644
--- a/packages/mysql/test-d/index.test-d.ts
+++ b/packages/mysql/test-d/index.test-d.ts
@@ -16,10 +16,10 @@ const connectionMySQL: captureMySQL.PatchedConnection = mysql.createConnection(c
 const poolMySQL: captureMySQL.PatchedPool = mysql.createPool(config);
 const poolClusterMySQL: captureMySQL.PatchedPoolCluster = mysql.createPoolCluster(config);
 
-const queryCallback: MySQL.queryCallback = function (err: MySQL.MysqlError | null, rows: any) {
+const queryCallbackMySQL: MySQL.queryCallback = function (err: MySQL.MysqlError | null, rows: any) {
 };
 
-const getConnectionCallback = function (err: MySQL.MysqlError, conn: captureMySQL.PatchedConnection) {
+const getConnectionCallbackMySQL = function (err: MySQL.MysqlError, conn: captureMySQL.PatchedConnection) {
 };
 
 const connectionMySQL2: captureMySQL.PatchedMySQL2Connection = mysql2.createConnection(config);
@@ -28,16 +28,16 @@ const poolClusterMySQL2: captureMySQL.PatchedMySQL2PoolCluster = mysql2.createPo
 
 const queryCallbackMySQL2: captureMySQL.MySQL2QueryCallback | undefined = function () { };
 
-expectType<MySQL.Query>(connectionMySQL.query('SELECT * FROM cats', queryCallback));
-expectType<MySQL.Query>(connectionMySQL.query('SELECT * FROM cats', queryCallback, segment));
+expectType<MySQL.Query>(connectionMySQL.query('SELECT * FROM cats', queryCallbackMySQL));
+expectType<MySQL.Query>(connectionMySQL.query('SELECT * FROM cats', queryCallbackMySQL, segment));
 
-expectType<MySQL.Query>(poolMySQL.query('SELECT * FROM cats', queryCallback));
-expectType<MySQL.Query>(poolMySQL.query('SELECT * FROM cats', queryCallback, segment));
-expectType<void>(poolMySQL.getConnection(getConnectionCallback));
+expectType<MySQL.Query>(poolMySQL.query('SELECT * FROM cats', queryCallbackMySQL));
+expectType<MySQL.Query>(poolMySQL.query('SELECT * FROM cats', queryCallbackMySQL, segment));
+expectType<void>(poolMySQL.getConnection(getConnectionCallbackMySQL));
 
-expectType<void>(poolClusterMySQL.getConnection(getConnectionCallback));
-expectType<void>(poolClusterMySQL.getConnection('pattern', getConnectionCallback));
-expectType<void>(poolClusterMySQL.getConnection('pattern', 'selector', getConnectionCallback));
+expectType<void>(poolClusterMySQL.getConnection(getConnectionCallbackMySQL));
+expectType<void>(poolClusterMySQL.getConnection('pattern', getConnectionCallbackMySQL));
+expectType<void>(poolClusterMySQL.getConnection('pattern', 'selector', getConnectionCallbackMySQL));
 
 expectType<captureMySQL.PatchedPool>(poolClusterMySQL.of('pattern'));
 expectType<captureMySQL.PatchedPool>(poolClusterMySQL.of('pattern', 'selector'));