diff --git a/.circleci/config.yml b/.circleci/config.yml
index b0a3238fb6..237612150c 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -4,9 +4,35 @@ orbs:
   python: circleci/python@1.5.0
 
 jobs:
-  core-integration-tests:
+  style_and_unit_tests:
+    parameters:
+      python_version:
+        type: string
+    docker:
+      - image: cimg/python:<< parameters.python_version >>
+    resource_class: small
+    steps:
+      - checkout
+      - run:
+          name: Install OpenJDK
+          command: sudo apt-get update && sudo apt-get install default-jdk
+      - run:
+          name: Install dependencies
+          command: make install-dev
+      - run:
+          name: Run liners and code style checks
+          command: make style
+      - run:
+          name: Run unit tests
+          command: make unit-test
+      - run:
+          name: Run doc tests
+          command: make doc-test
+
+  core_integration_tests:
     docker:
       - image: cimg/python:3.7
+    resource_class: small
     steps:
       - checkout
       - run:
@@ -16,10 +42,11 @@ jobs:
           name: Run Core integration tests
           command: make core-it-test
 
-  airflow-integration-tests:
+  airflow_integration_tests:
     machine:
       image: ubuntu-2204:2022.10.2
       docker_layer_caching: true
+    resource_class: large
     steps:
       - checkout
       - run:
@@ -39,7 +66,11 @@ jobs:
           path: /tmp/airflow_logs
 
 workflows:
-  main-pr-integration-tests:
+  main_pr:
     jobs:
-      - core-integration-tests
-      - airflow-integration-tests
+      - style_and_unit_tests:
+          matrix:
+            parameters:
+              python_version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+      - core_integration_tests
+      - airflow_integration_tests
diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
deleted file mode 100644
index 6bd7c19f34..0000000000
--- a/.github/workflows/main.yaml
+++ /dev/null
@@ -1,29 +0,0 @@
-name: SQLMesh Main
-
-on:
-  pull_request:
-    branches: [ main ]
-jobs:
-  style-and-unit-tests:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
-    steps:
-    - uses: actions/checkout@v3
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v4
-      with:
-        python-version: ${{ matrix.python-version }}
-    - name: Install dependencies
-      run: |
-        make install-dev
-    - name: Run linters and code style checks
-      run: |
-        make style
-    - name: Run unit tests
-      run: |
-        make unit-test
-    - name: Run doc tests
-      run: |
-        make doc-test