diff --git a/.azure-pipelines/SDKAutomation.yml b/.azure-pipelines/SDKAutomation.yml
index 521308755773..bc1d551b0d9c 100644
--- a/.azure-pipelines/SDKAutomation.yml
+++ b/.azure-pipelines/SDKAutomation.yml
@@ -2,7 +2,10 @@ trigger:
   batch: false
   branches:
     include:
-      - "*"
+      - master
+
+pr:
+  autoCancel: false
 
 jobs:
 - job: "SDKAutomation"
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 68da20933d61..99db62225099 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -5,6 +5,9 @@ trigger:
     include:
       - master
 
+pr:
+  autoCancel: false
+
 variables:
   TRAVIS: 'true'
   TRAVIS_BRANCH: $(System.PullRequest.TargetBranch)
diff --git a/preproduction-azure-pipelines.yml b/preproduction-azure-pipelines.yml
index d2b59829aad7..acfd68e91a4f 100644
--- a/preproduction-azure-pipelines.yml
+++ b/preproduction-azure-pipelines.yml
@@ -2,6 +2,9 @@ name: "Preproduction CI for Azure Rest API specifications"
 
 trigger: none
 
+pr:
+  autoCancel: false
+
 variables:
   TRAVIS: 'true'
   TRAVIS_BRANCH: $(System.PullRequest.TargetBranch)