diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c38a039..12c9a11 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,6 +1,11 @@
 name: ci
 
-on: [push, pull_request]
+on:
+  push:
+    # only pushes to main trigger
+    branches: [main]
+  pull_request:
+    # always triggered
 
 jobs:
 
diff --git a/examples/example_01.py b/examples/example_01.py
index b11401d..e0d9c05 100644
--- a/examples/example_01.py
+++ b/examples/example_01.py
@@ -22,9 +22,7 @@ def test_run(diff_code):
     if not diff_code:
         # get code
         computer = helpers.get_computer()
-        diff_code = helpers.get_code(
-            entry_point='diff', computer=computer
-        )
+        diff_code = helpers.get_code(entry_point='diff', computer=computer)
 
     # Prepare input parameters
     diff_parameters = DataFactory('diff')