diff --git a/.appveyor.yml b/.appveyor.yml
index c586473b..23538d63 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -2,7 +2,6 @@ branches:
   only:
     - staging
     - trying
-    - master
     - /post-.*/
 
 build: false
diff --git a/.travis.yml b/.travis.yml
index 22f1dd0b..cab13b7b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,8 +6,6 @@ branches:
     - staging
     # This is where pull requests from "bors try" are built.
     - trying
-    # Build pull requests.
-    - master
     # Build post braches
     - /^post-.*$/
 
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 50b69815..d37b53d2 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -8,8 +8,6 @@ trigger:
     - staging
     # This is where pull requests from "bors try" are built.
     - trying
-    # Build pull requests.
-    - master
     # Build post braches
     - post-*