diff --git a/.travis.yml b/.travis.yml
index a7f5fd074..b7bd768d9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -90,5 +90,10 @@ script:
             (tar xf curl-99.98.97.tar.gz && mkdir build && cd build && ../curl-99.98.97/configure && make && make TFLAGS=1 test)
         fi
 
+# whitelist branches to avoid testing feature branches twice (as branch and as pull request)
+branches:
+    only:
+        - master
+
 notifications:
   email: false
diff --git a/appveyor.yml b/appveyor.yml
index b9d5a7f2f..8e55009da 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -63,3 +63,8 @@ build_script:
     - cd build.%BDIR%
     - cmake .. -G"%PRJ_GEN%" -DCMAKE_USE_OPENSSL=%OPENSSL% -DCURL_STATICLIB=%STATICLIB% -DBUILD_TESTING=%TESTING%
     - cmake --build . --config %PRJ_CFG% --clean-first
+
+# whitelist branches to avoid testing feature branches twice (as branch and as pull request)
+branches:
+    only:
+        - master