diff --git a/.github/workflows/python-test.yml b/.github/workflows/python-test.yml
index 7fa5e69..0685656 100644
--- a/.github/workflows/python-test.yml
+++ b/.github/workflows/python-test.yml
@@ -5,7 +5,7 @@ name: Package test
 
 on:
   push:
-    branches: [ "main" ]
+    branches: [ "main", "dev"]
   pull_request:
     branches: [ "main" ]
 
@@ -28,6 +28,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         python -m pip install flake8 pytest
+        python -m pip install mypy
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
     - name: Lint with flake8
       run: |
@@ -35,7 +36,10 @@ jobs:
         flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
         # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
         flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
-    - name: Test with pytest
+    - name: Type checking
+      run: |
+        mypy
+    - name: Test with unittest
       run: |
         bash run_tests.sh
   build: