diff --git a/packages/server/src/api/routes/tests/datasource.spec.ts b/packages/server/src/api/routes/tests/datasource.spec.ts
index 5019073db4..3c1d7839e8 100644
--- a/packages/server/src/api/routes/tests/datasource.spec.ts
+++ b/packages/server/src/api/routes/tests/datasource.spec.ts
@@ -37,7 +37,7 @@ describe("/datasources", () => {
         .expect(200)
 
       expect(res.body.datasource.name).toEqual("Test")
-      expect(res.body.errors).toBeUndefined()
+      expect(res.body.errors).toEqual({})
       expect(events.datasource.created).toBeCalledTimes(1)
     })
   })
diff --git a/packages/server/src/integrations/microsoftSqlServer.ts b/packages/server/src/integrations/microsoftSqlServer.ts
index 113c1da878..06ffaf955d 100644
--- a/packages/server/src/integrations/microsoftSqlServer.ts
+++ b/packages/server/src/integrations/microsoftSqlServer.ts
@@ -192,8 +192,6 @@ class SqlServerIntegration extends Sql implements DatasourcePlus {
   private readonly config: MSSQLConfig
   private index: number = 0
   private client?: sqlServer.ConnectionPool
-  public tables: Record<string, ExternalTable> = {}
-  public schemaErrors: Record<string, string> = {}
 
   MASTER_TABLES = [
     "spt_fallback_db",
diff --git a/packages/server/src/integrations/oracle.ts b/packages/server/src/integrations/oracle.ts
index 97d0318954..28d8fdd84d 100644
--- a/packages/server/src/integrations/oracle.ts
+++ b/packages/server/src/integrations/oracle.ts
@@ -110,9 +110,6 @@ class OracleIntegration extends Sql implements DatasourcePlus {
   private readonly config: OracleConfig
   private index: number = 1
 
-  public tables: Record<string, ExternalTable> = {}
-  public schemaErrors: Record<string, string> = {}
-
   private readonly COLUMNS_SQL = `
     SELECT
       tabs.table_name,