diff --git a/.github/workflows/_integration_tests.yml b/.github/workflows/_integration_tests.yml
new file mode 100644
index 00000000..7a4bbc9a
--- /dev/null
+++ b/.github/workflows/_integration_tests.yml
@@ -0,0 +1,30 @@
+name: Integration Tests
+on: workflow_call
+jobs:
+  integration-tests:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os:
+          - ${{ vars.UBUNTU_VERSION }}
+        node-version: [14.x, 16.x]
+        es-version: [7.6.1]
+        jdk-version: [oraclejdk11]
+    steps:
+    - uses: actions/checkout@v2
+    - name: Install node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v2-beta
+      with:
+        node-version: ${{ matrix.node-version }}
+    - name: Start elasticsearch ${{ matrix.es-version }} (${{ matrix.jdk-version }})
+      env:
+        ES_VERSION: ${{ matrix.es-version }}
+        JDK_VERSION: ${{ matrix.jdk-version }}
+      run: ./scripts/setup_ci.sh
+    - name: Run integration tests
+      run: |
+        npm install -g npm
+        npm install
+        curl http://127.0.0.1:9200/
+        ./bin/create_index
+        npm run integration
diff --git a/.github/workflows/_unit_tests.yml b/.github/workflows/_unit_tests.yml
new file mode 100644
index 00000000..53d6d0e3
--- /dev/null
+++ b/.github/workflows/_unit_tests.yml
@@ -0,0 +1,21 @@
+name: Unit Tests
+on: workflow_call
+jobs:
+  unit-tests:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os:
+          - ${{ vars.UBUNTU_VERSION }}
+        node-version: [14.x, 16.x]
+    steps:
+    - uses: actions/checkout@v2
+    - name: Install node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v2-beta
+      with:
+        node-version: ${{ matrix.node-version }}
+    - name: Run unit tests
+      run: |
+        npm install -g npm
+        npm install
+        npm run test
diff --git a/.github/workflows/pull_request.yml b/.github/workflows/pull_request.yml
new file mode 100644
index 00000000..cedb5e1e
--- /dev/null
+++ b/.github/workflows/pull_request.yml
@@ -0,0 +1,11 @@
+name: Continuous Integration
+on: pull_request
+jobs:
+  unit-tests:
+    # only run this job for forks
+    if: github.event.pull_request.head.repo.full_name != github.repository
+    uses: ./.github/workflows/_unit_tests.yml
+  integration-tests:
+    # only run this job for forks
+    if: github.event.pull_request.head.repo.full_name != github.repository
+    uses: ./.github/workflows/_integration_tests.yml
diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml
index f5c046f3..cb27eaa5 100644
--- a/.github/workflows/push.yml
+++ b/.github/workflows/push.yml
@@ -5,53 +5,13 @@ on:
       - 'v[0-9]+.[0-9]+.[0-9]+'
 jobs:
   unit-tests:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-20.04]
-        node-version: [14.x, 16.x]
-    steps:
-    - uses: actions/checkout@v2
-    - name: Install node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v2-beta
-      with:
-        node-version: ${{ matrix.node-version }}
-    - name: Run unit tests
-      run: |
-        npm install -g npm
-        npm install
-        npm run test
+    uses: ./.github/workflows/_unit_tests.yml
   integration-tests:
-    needs: unit-tests
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-20.04]
-        node-version: [14.x, 16.x]
-        es-version: [7.6.1]
-        jdk-version: [oraclejdk11]
-    steps:
-    - uses: actions/checkout@v2
-    - name: Install node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v2-beta
-      with:
-        node-version: ${{ matrix.node-version }}
-    - name: Start elasticsearch ${{ matrix.es-version }} (${{ matrix.jdk-version }})
-      env:
-        ES_VERSION: ${{ matrix.es-version }}
-        JDK_VERSION: ${{ matrix.jdk-version }}
-      run: ./scripts/setup_ci.sh
-    - name: Run integration tests
-      run: |
-        npm install -g npm
-        npm install
-        curl http://127.0.0.1:9200/
-        ./bin/create_index
-        npm run integration
+    uses: ./.github/workflows/_integration_tests.yml
   npm-publish:
     needs: [unit-tests, integration-tests]
     if: github.ref == 'refs/heads/master' && github.event_name == 'push'
-    runs-on: ubuntu-20.04
+    runs-on: ${{ vars.UBUNTU_VERSION }}
     steps:
     - uses: actions/checkout@v2
     - name: Install Node.js
@@ -69,7 +29,7 @@ jobs:
     # note: github actions won't run a job if you don't call one of the status check functions, so `always()` is called since it evalutes to `true`
     if: ${{ always() && needs.unit-tests.result == 'success' && (needs.npm-publish.result == 'success' || needs.npm-publish.result == 'skipped') }}
     needs: [unit-tests, integration-tests, npm-publish]
-    runs-on: ubuntu-20.04
+    runs-on: ${{ vars.UBUNTU_VERSION }}
     steps:
       - uses: actions/checkout@v2
       - name: Build Docker images