diff --git a/.github/workflows/pitest.yml b/.github/workflows/pitest.yml
index 0b8ad15..45fee65 100644
--- a/.github/workflows/pitest.yml
+++ b/.github/workflows/pitest.yml
@@ -1,5 +1,8 @@
-name: Test
-on: [push]
+name: PIT test
+on:
+  push:
+    paths:
+      - 'src/**'
 
 jobs:
   test:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 556c5c1..b05ace7 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,8 +1,11 @@
 name: Test
-on: [push]
+on:
+  push:
+    paths:
+      - 'src/**'
 
 jobs:
-  test:
+  pitest:
     if: github.ref == 'refs/heads/master'
     runs-on: ubuntu-latest
     steps:
diff --git a/build.gradle b/build.gradle
index c6cc28e..c8ec459 100644
--- a/build.gradle
+++ b/build.gradle
@@ -10,7 +10,7 @@ pitest {
     junit5PluginVersion = '0.15'
     excludedClasses = ["sh.okx.rankup.Metrics*"]
     timestampedReports = false
-    threads = 3
+    threads = 2
 }
 
 group 'sh.okx'