Change default postgres DSN for github action

.github/workflows/tests.yml

@@ -139,7 +139,7 @@ jobs:
         key: ${{ runner.os }}-go-${{ matrix.go }}-${{ hashFiles('tests/go.mod') }}
 
     - name: Tests
-      run: GORM_DIALECT=postgres GORM_DSN="user=gorm password=gorm DB.name=gorm port=9920 sslmode=disable TimeZone=Asia/Shanghai" ./tests/tests_all.sh
+      run: GORM_DIALECT=postgres GORM_DSN="user=gorm password=gorm DB.name=gorm host=localhost port=9920 sslmode=disable TimeZone=Asia/Shanghai" ./tests/tests_all.sh
 
   sqlserver:
     strategy:

tests/tests_test.go

@@ -52,7 +52,7 @@ func OpenTestConnection() (db *gorm.DB, err error) {
 	case "postgres":
 		log.Println("testing postgres...")
 		if dbDSN == "" {
-			dbDSN = "user=gorm password=gorm DB.name=gorm port=9920 sslmode=disable TimeZone=Asia/Shanghai"
+			dbDSN = "user=gorm password=gorm DB.name=gorm host=localhost port=9920 sslmode=disable TimeZone=Asia/Shanghai"
 		}
 		db, err = gorm.Open(postgres.New(postgres.Config{
 			DSN:                  dbDSN,