diff --git a/.github/workflows/ci-postgres-mysql.yml b/.github/workflows/ci-postgres-mysql.yml
index fbf9cb92d1..862230f04b 100644
--- a/.github/workflows/ci-postgres-mysql.yml
+++ b/.github/workflows/ci-postgres-mysql.yml
@@ -62,7 +62,7 @@ jobs:
     timeout-minutes: 20
     env:
       DB_MYSQLDB_PASSWORD: password
-      DB_MYSQLDB_POOL_SIZE: 20
+      DB_MYSQLDB_POOL_SIZE: 1
       DB_MYSQLDB_CONNECTION_TIMEOUT: 120000
       DB_MYSQLDB_ACQUIRE_TIMEOUT: 120000
       DB_MYSQLDB_TIMEOUT: 120000
@@ -91,7 +91,7 @@ jobs:
     timeout-minutes: 20
     env:
       DB_MYSQLDB_PASSWORD: password
-      DB_MYSQLDB_POOL_SIZE: 30
+      DB_MYSQLDB_POOL_SIZE: 1
       DB_MYSQLDB_CONNECTION_TIMEOUT: 120000
       DB_MYSQLDB_ACQUIRE_TIMEOUT: 120000
       DB_MYSQLDB_TIMEOUT: 120000