diff --git a/.github/actions/install-modules/action.yml b/.github/actions/install-modules/action.yml
index 2767ac53f7..73e6826b46 100644
--- a/.github/actions/install-modules/action.yml
+++ b/.github/actions/install-modules/action.yml
@@ -1,12 +1,7 @@
 name: 'Install modules'
-description: 'Run yarn install and add global modules'
-inputs:
-  globalPackages:
-    description: 'Global packages to install'
+description: 'Install yarn dependencies'
 runs:
   using: 'composite'
   steps:
     - run: $GITHUB_ACTION_PATH/script.sh
-      env:
-        GLOBAL_PACKAGES: ${{ inputs.globalPackages }}
       shell: bash
diff --git a/.github/actions/install-modules/script.sh b/.github/actions/install-modules/script.sh
index 4f66899c59..f4a3806144 100755
--- a/.github/actions/install-modules/script.sh
+++ b/.github/actions/install-modules/script.sh
@@ -1,8 +1,2 @@
-# install global packages if set
-if [[ -n "$GLOBAL_PACKAGES" ]]; then
-  yarn global add "$GLOBAL_PACKAGES"
-  yarn global bin >>$GITHUB_PATH
-fi
-
 # run yarn
 yarn
diff --git a/.github/workflows/db/postgres/init.sql b/.github/workflows/db/postgres/init.sql
new file mode 100644
index 0000000000..138887e817
--- /dev/null
+++ b/.github/workflows/db/postgres/init.sql
@@ -0,0 +1 @@
+CREATE SCHEMA myschema;
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 82b5a50644..0ab790d4a1 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -34,8 +34,6 @@ jobs:
     name: 'unit_back (node: ${{ matrix.node }})'
     needs: [lint]
     runs-on: ubuntu-latest
-    env:
-      CODECOV_TOKEN: ${{ secrets.codecov }}
     strategy:
       matrix:
         node: [14, 16, 18]
@@ -46,17 +44,19 @@ jobs:
           node-version: ${{ matrix.node }}
           cache: yarn
       - uses: ./.github/actions/install-modules
-        with:
-          globalPackages: codecov
       - name: Run tests
-        run: yarn run -s test:unit --coverage && codecov -C -F unit
+        run: yarn run -s test:unit --coverage
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v3
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          directory: ./coverage
+          flags: back,unit_back
 
   unit_front:
     name: 'unit_front (node: ${{ matrix.node }})'
     needs: [lint]
     runs-on: ubuntu-latest
-    env:
-      CODECOV_TOKEN: ${{ secrets.codecov }}
     strategy:
       matrix:
         node: [14, 16, 18]
@@ -67,12 +67,16 @@ jobs:
           node-version: ${{ matrix.node }}
           cache: yarn
       - uses: ./.github/actions/install-modules
-        with:
-          globalPackages: codecov
       - name: Build
         run: yarn build
       - name: Run test
-        run: yarn run -s test:front --coverage && codecov -C -F front
+        run: yarn run -s test:front --coverage
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v3
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          directory: ./coverage
+          flags: front,unit_front
 
   api_ce_pg:
     runs-on: ubuntu-latest
@@ -96,6 +100,7 @@ jobs:
           --health-interval 10s
           --health-timeout 5s
           --health-retries 5
+          -v /__w/.github/workflows/db/postgres:/docker-entrypoint-initdb.d
         ports:
           # Maps tcp port 5432 on service container to the host
           - 5432:5432
@@ -226,6 +231,7 @@ jobs:
           --health-interval 10s
           --health-timeout 5s
           --health-retries 5
+          -v /__w/.github/workflows/db/postgres:/docker-entrypoint-initdb.d
         ports:
           # Maps tcp port 5432 on service container to the host
           - 5432:5432
diff --git a/.gitignore b/.gitignore
index b9472f751b..06d74047d7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -68,6 +68,7 @@ $RECYCLE.BIN/
 .tmp
 *.log
 *.sql
+!.github/workflows/db/**/*.sql
 *.sqlite
 
 
diff --git a/jest.config.js b/jest.config.js
index 7c265e8ca7..85b9798b19 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -1,5 +1,6 @@
 'use strict';
 
 module.exports = {
+  coverageDirectory: '<rootDir>/coverage',
   projects: ['<rootDir>/packages/**/jest.config.js', '<rootDir>/.github'],
 };
diff --git a/packages/core/admin/jest.config.front.js b/packages/core/admin/jest.config.front.js
index 3c3bd59d20..7e4e322bb7 100644
--- a/packages/core/admin/jest.config.front.js
+++ b/packages/core/admin/jest.config.front.js
@@ -8,5 +8,4 @@ module.exports = {
   displayName: (pkg.strapi && pkg.strapi.name) || pkg.name,
   roots: [__dirname],
   collectCoverageFrom: ['<rootDir>/packages/core/admin/admin/**/*.js'],
-  coverageDirectory: '<rootDir>/packages/core/admin/coverage',
 };
diff --git a/packages/core/database/lib/entity-manager/regular-relations.js b/packages/core/database/lib/entity-manager/regular-relations.js
index 7b1e69ce04..0174cae83b 100644
--- a/packages/core/database/lib/entity-manager/regular-relations.js
+++ b/packages/core/database/lib/entity-manager/regular-relations.js
@@ -10,6 +10,7 @@ const {
   hasInverseOrderColumn,
 } = require('../metadata/relations');
 const { createQueryBuilder } = require('../query');
+const { addSchema } = require('../utils/knex');
 
 /**
  * If some relations currently exist for this oneToX relation, on the one side, this function removes them and update the inverse order if needed.
@@ -241,7 +242,8 @@ const cleanOrderColumns = async ({ id, attribute, db, inverseRelIds, transaction
         )
         .transacting(trx);
       break;
-    default:
+    default: {
+      const joinTableName = addSchema(joinTable.name);
       await db.connection
         .raw(
           `UPDATE ?? as a
@@ -252,9 +254,10 @@ const cleanOrderColumns = async ({ id, attribute, db, inverseRelIds, transaction
                 WHERE ${where.join(' OR ')}
               ) AS b
               WHERE b.id = a.id`,
-          [joinTable.name, ...updateBinding, ...selectBinding, joinTable.name, ...whereBinding]
+          [joinTableName, ...updateBinding, ...selectBinding, joinTableName, ...whereBinding]
         )
         .transacting(trx);
+    }
     /*
       `UPDATE :joinTable: as a
         SET :orderColumn: = b.src_order, :inverseOrderColumn: = b.inv_order
diff --git a/packages/core/database/lib/utils/knex.js b/packages/core/database/lib/utils/knex.js
index 9e437d71c5..3306b37672 100644
--- a/packages/core/database/lib/utils/knex.js
+++ b/packages/core/database/lib/utils/knex.js
@@ -7,6 +7,16 @@ const isKnexQuery = (value) => {
   return value instanceof KnexBuilder || value instanceof KnexRaw;
 };
 
+/**
+ * Adds the name of the schema to the table name if the schema was defined by the user.
+ * Users can set the db schema only for Postgres in strapi database config.
+ */
+const addSchema = (tableName) => {
+  const schemaName = strapi.db.connection.getSchemaName();
+  return schemaName ? `${schemaName}.${tableName}` : tableName;
+};
+
 module.exports = {
   isKnexQuery,
+  addSchema,
 };
diff --git a/packages/core/helper-plugin/jest.config.front.js b/packages/core/helper-plugin/jest.config.front.js
index a2fb1019e7..e0c3ffe921 100644
--- a/packages/core/helper-plugin/jest.config.front.js
+++ b/packages/core/helper-plugin/jest.config.front.js
@@ -6,5 +6,4 @@ module.exports = {
   displayName: (pkg.strapi && pkg.strapi.name) || pkg.name,
   roots: [__dirname],
   collectCoverageFrom: ['<rootDir>/packages/core/helper-plugin/lib/src/**/*.js'],
-  coverageDirectory: '<rootDir>/packages/core/helper-plugin/coverage',
 };
diff --git a/packages/core/upload/server/controllers/admin-folder-file.js b/packages/core/upload/server/controllers/admin-folder-file.js
index c17a7ba739..d3597e88bc 100644
--- a/packages/core/upload/server/controllers/admin-folder-file.js
+++ b/packages/core/upload/server/controllers/admin-folder-file.js
@@ -154,7 +154,7 @@ module.exports = {
 
           // update path for folders themselves & folders below
           totalFolderNumber = await strapi.db
-            .connection(folderTable)
+            .getConnection(folderTable)
             .transacting(trx)
             .where(pathColName, existingFolder.path)
             .orWhere(pathColName, 'like', `${existingFolder.path}/%`)
@@ -169,7 +169,7 @@ module.exports = {
 
           // update path of files below
           totalFileNumber = await strapi.db
-            .connection(fileTable)
+            .getConnection(fileTable)
             .transacting(trx)
             .where(folderPathColName, existingFolder.path)
             .orWhere(folderPathColName, 'like', `${existingFolder.path}/%`)
@@ -209,7 +209,7 @@ module.exports = {
 
         // update files main fields (path + updatedBy)
         await strapi.db
-          .connection(fileTable)
+          .getConnection(fileTable)
           .transacting(trx)
           .whereIn('id', fileIds)
           .update(folderPathColName, destinationFolderPath);
diff --git a/packages/core/upload/server/services/__tests__/metrics.js b/packages/core/upload/server/services/__tests__/metrics.js
index 7fafdd80cf..956e86648d 100644
--- a/packages/core/upload/server/services/__tests__/metrics.js
+++ b/packages/core/upload/server/services/__tests__/metrics.js
@@ -41,7 +41,7 @@ describe('metrics', () => {
           metadata: {
             get: () => ({ attributes: { path: { columnName: 'path' } } }),
           },
-          connection() {
+          getConnection() {
             return {
               select() {
                 return {
@@ -53,7 +53,7 @@ describe('metrics', () => {
           },
         },
       };
-      strapi.db.connection.raw = raw;
+      strapi.db.connection = { raw };
 
       const { computeMetrics } = metricsService({ strapi });
 
diff --git a/packages/core/upload/server/services/folder.js b/packages/core/upload/server/services/folder.js
index e6741f9b39..cf31d95485 100644
--- a/packages/core/upload/server/services/folder.js
+++ b/packages/core/upload/server/services/folder.js
@@ -147,7 +147,7 @@ const update = async (id, { name, parent }, { user }) => {
 
       // update folders below
       await strapi.db
-        .connection(folderTable)
+        .getConnection(folderTable)
         .transacting(trx)
         .where(pathColumnName, existingFolder.path)
         .orWhere(pathColumnName, 'like', `${existingFolder.path}/%`)
@@ -162,7 +162,7 @@ const update = async (id, { name, parent }, { user }) => {
 
       // update files below
       await strapi.db
-        .connection(fileTable)
+        .getConnection(fileTable)
         .transacting(trx)
         .where(folderPathColumnName, existingFolder.path)
         .orWhere(folderPathColumnName, 'like', `${existingFolder.path}/%`)
diff --git a/packages/core/upload/server/services/metrics.js b/packages/core/upload/server/services/metrics.js
index 2b9e2a13c4..c20ca46165 100644
--- a/packages/core/upload/server/services/metrics.js
+++ b/packages/core/upload/server/services/metrics.js
@@ -27,8 +27,6 @@ module.exports = ({ strapi }) => ({
       queryParams.push(String(i), '');
     }
 
-    const knex = strapi.db.connection;
-
     /*
       The following query goal is to count the number of folders with depth 1, depth 2 etc.
       The query returns :
@@ -49,9 +47,10 @@ module.exports = ({ strapi }) => ({
     */
 
     const folderLevelsArray = (
-      await knex(folderTable)
+      await strapi.db
+        .getConnection(folderTable)
         .select(
-          knex.raw(
+          strapi.db.connection.raw(
             `LENGTH(${keepOnlySlashesSQLString}) AS depth, COUNT(*) AS occurence`,
             queryParams
           )
diff --git a/packages/plugins/i18n/server/migrations/field/migrate-for-bookshelf.js b/packages/plugins/i18n/server/migrations/field/migrate-for-bookshelf.js
index fbe7385a70..fc4c4dd2ea 100644
--- a/packages/plugins/i18n/server/migrations/field/migrate-for-bookshelf.js
+++ b/packages/plugins/i18n/server/migrations/field/migrate-for-bookshelf.js
@@ -18,6 +18,7 @@ const batchInsertInTmpTable = async ({ updatesInfo }, { transacting: trx }) => {
 const updateFromTmpTable = async ({ model, attributesToMigrate }, { transacting: trx }) => {
   const { collectionName } = model;
   if (model.client === 'pg') {
+    // IMPORTANT TODO: use postgres schema
     const substitutes = attributesToMigrate.map(() => '?? = ??.??').join(',');
     const bindings = [collectionName];
     attributesToMigrate.forEach((attr) => bindings.push(attr, TMP_TABLE_NAME, attr));
diff --git a/test/api.js b/test/api.js
index 572e8e0df8..e3341236e7 100644
--- a/test/api.js
+++ b/test/api.js
@@ -20,6 +20,7 @@ const databases = {
       database: 'strapi_test',
       username: 'strapi',
       password: 'strapi',
+      schema: 'myschema',
     },
   },
   mysql: {
diff --git a/test/create-test-app.js b/test/create-test-app.js
index 9df9bd9cec..ebd5b09ead 100644
--- a/test/create-test-app.js
+++ b/test/create-test-app.js
@@ -16,6 +16,7 @@ const databases = {
       database: 'strapi_test',
       username: 'strapi',
       password: 'strapi',
+      schema: 'myschema',
     },
   },
   mysql: {