diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 894264c..cadbd78 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -2,7 +2,7 @@ name: CI
 
 on: 
   push:
-    branches: [ci]
+    branches: [dev]
   pull_request:
     branches: [ci]
 
@@ -18,7 +18,7 @@ jobs:
     strategy:
       matrix:
         # os: [macos-latest, ubuntu-latest]
-        os: [macos-latest]
+        os: [ubuntu-latest]
         python-version: ["3.10"]
 
     steps:
diff --git a/tests/test_integration.py b/tests/test_integration.py
index c771a39..3f8defe 100755
--- a/tests/test_integration.py
+++ b/tests/test_integration.py
@@ -6,7 +6,6 @@
 
 # import
 import os
-os.environ["KMP_DUPLICATE_LIB_OK"] = "True"
 
 import shutil