diff --git a/.github/workflows/codestyle.yml b/.github/workflows/codestyle.yml
index 4ef58979477..bf5ada7cd94 100644
--- a/.github/workflows/codestyle.yml
+++ b/.github/workflows/codestyle.yml
@@ -9,14 +9,14 @@ on:
     branches:
       - "*"
 
-  pull_request:
-    branches:
-      - "*"
-
   pull_request_target:
     branches:
       - master
 
+defaults:
+  run:
+    shell: bash -l {0}
+
 jobs:
   black:
     runs-on: ubuntu-latest