diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
index e11aded..4cfde62 100644
--- a/.github/workflows/pytest.yml
+++ b/.github/workflows/pytest.yml
@@ -3,7 +3,7 @@ name: pytest
 on:
   push:
     branches:
-      - main
+      - master
   pull_request:
   schedule:
     - cron: '0 8 * * *'
@@ -16,9 +16,14 @@ jobs:
       matrix:
         python-version: ["3.10", "3.9", "3.8", "3.7"]
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+    - name: 'fetch master'
+      run: |
+        git fetch origin master
     - name: 'Set up Python ${{ matrix.python-version }}'
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v2
       with:
         python-version: '${{ matrix.python-version }}'
 
@@ -29,7 +34,7 @@ jobs:
 
     - name: 'Install package'
       run: |
-        make install-poetry
+        pip3 install poetry
         make install
 
     - name: 'List installed packages'