diff --git a/.github/workflows/build-wheels.yml b/.github/workflows/build-wheels.yml
index 4816482d..bd352863 100644
--- a/.github/workflows/build-wheels.yml
+++ b/.github/workflows/build-wheels.yml
@@ -1,6 +1,12 @@
 name: Build source and wheel packages
 
-on: push
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
 
 jobs:
   build:
@@ -16,6 +22,14 @@ jobs:
         if: startsWith(matrix.os, 'ubuntu-')
         run: sudo echo RESET grub-efi/install_devices | sudo debconf-communicate grub-pc
 
+      - name: Cache dependencies
+        uses: actions/cache@v3
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-build-wheels-${{ hashFiles('setup.cfg', 'setup.py') }}
+          restore-keys: |
+            ${{ runner.os }}-build-wheels-
+
       - name: Install required system packages for macOS
         if: startsWith(matrix.os, 'macos-')
         run: |
diff --git a/.github/workflows/code-quality.yml b/.github/workflows/code-quality.yml
index 494c75e8..6576a34e 100644
--- a/.github/workflows/code-quality.yml
+++ b/.github/workflows/code-quality.yml
@@ -1,6 +1,10 @@
 name: Test code quality
 
-on: push
+on:
+  push:
+  pull_request:
+    branches:
+      - main
 
 jobs:
   code-quality:
@@ -12,6 +16,14 @@ jobs:
       - name: Workaround github issue https://github.com/actions/runner-images/issues/7192
         run: sudo echo RESET grub-efi/install_devices | sudo debconf-communicate grub-pc
 
+      - name: Cache dependencies
+        uses: actions/cache@v3
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-code-quality-${{ hashFiles('setup.cfg', 'setup.py') }}
+          restore-keys: |
+            ${{ runner.os }}-code-quality-
+
       - name: Install required system packages only for Ubuntu Linux
         run: |
           sudo apt-get update
diff --git a/.github/workflows/pytest-docker.yml b/.github/workflows/pytest-docker.yml
index 68913354..d6e0759d 100644
--- a/.github/workflows/pytest-docker.yml
+++ b/.github/workflows/pytest-docker.yml
@@ -1,6 +1,9 @@
 name: Test using Pytest in Docker
 
 on:
+  push:
+    branches:
+      - main
   pull_request:
     branches:
       - main
diff --git a/tests/unit/test_asynchronous.py b/tests/unit/test_asynchronous.py
index f70a3e16..21c92feb 100644
--- a/tests/unit/test_asynchronous.py
+++ b/tests/unit/test_asynchronous.py
@@ -32,7 +32,7 @@ async def __aexit__(self, exc_type, exc_val, exc_tb):
         @property
         def status(self):
             return 200 if self.sync else 202
-        
+
         async def raise_for_status(self):
             ...
 
diff --git a/tests/unit/test_upload.py b/tests/unit/test_upload.py
index 9812d06a..cdf52293 100644
--- a/tests/unit/test_upload.py
+++ b/tests/unit/test_upload.py
@@ -1,7 +1,7 @@
 import hashlib
 
 import pytest
-from aleph_message.models import StoreMessage
+from aleph_message.models import AlephMessage, StoreMessage
 from aleph_message.status import MessageStatus
 
 from aleph.sdk import AuthenticatedAlephHttpClient
@@ -33,7 +33,7 @@ async def test_upload_with_message():
         server_content = await client.download_file(file_hash=file_hash)
         assert server_content == content
 
-        server_message = await client.get_message(
+        server_message: AlephMessage = await client.get_message(
             item_hash=message.item_hash, message_type=StoreMessage
         )
-        assert server_message.content.item_hash == file_hash
\ No newline at end of file
+        assert server_message.content.item_hash == file_hash