diff --git a/eng/pipelines/coreclr/ci.yml b/eng/pipelines/coreclr/ci.yml
index 25a6b9f2607d67..f0c8b95e033a6d 100644
--- a/eng/pipelines/coreclr/ci.yml
+++ b/eng/pipelines/coreclr/ci.yml
@@ -1,5 +1,25 @@
 trigger:
-- master
+  branches:
+    include:
+    - master
+  paths:
+    include:
+    - '*'
+    - src/libraries/System.Private.CoreLib/*
+    exclude:
+    - docs/*
+    - CODE-OF-CONDUCT.md
+    - CONTRIBUTING.md
+    - LICENSE.TXT
+    - PATENTS.TXT
+    - README.md
+    - SECURITY.md
+    - THIRD-PARTY-NOTICES.TXT
+    - src/installer/*
+    - src/libraries/*
+    - eng/pipelines/installer/*
+    - eng/pipelines/libraries/*
+
 
 pr: none
 
diff --git a/eng/pipelines/coreclr/perf.yml b/eng/pipelines/coreclr/perf.yml
index 8da485bec6fc0f..37ac1eed90ec88 100644
--- a/eng/pipelines/coreclr/perf.yml
+++ b/eng/pipelines/coreclr/perf.yml
@@ -3,6 +3,24 @@ trigger:
   branches:
     include:
     - master
+  paths:
+    include:
+    - '*'
+    - src/libraries/System.Private.CoreLib/*
+    exclude:
+    - docs/*
+    - CODE-OF-CONDUCT.md
+    - CONTRIBUTING.md
+    - LICENSE.TXT
+    - PATENTS.TXT
+    - README.md
+    - SECURITY.md
+    - THIRD-PARTY-NOTICES.TXT
+    - src/installer/*
+    - src/libraries/*
+    - eng/pipelines/installer/*
+    - eng/pipelines/libraries/*
+
 
 pr: none
 
diff --git a/eng/pipelines/coreclr/pr.yml b/eng/pipelines/coreclr/pr.yml
index daf990a0274af1..c4a7bb4fa7ee31 100644
--- a/eng/pipelines/coreclr/pr.yml
+++ b/eng/pipelines/coreclr/pr.yml
@@ -1,11 +1,27 @@
 trigger: none
 
 pr:
-- master
-- release/2.1
-- release/2.2
-- release/3.0
-- release/3.1
+  branches:
+    include:
+    - master
+    - release/*.*
+  paths:
+    include:
+    - '*'
+    - src/libraries/System.Private.CoreLib/*
+    exclude:
+    - docs/*
+    - CODE-OF-CONDUCT.md
+    - CONTRIBUTING.md
+    - LICENSE.TXT
+    - PATENTS.TXT
+    - README.md
+    - SECURITY.md
+    - THIRD-PARTY-NOTICES.TXT
+    - src/installer/*
+    - src/libraries/*
+    - eng/pipelines/installer/*
+    - eng/pipelines/libraries/*
 
 jobs:
 #