diff --git a/.github/appveyor.yml b/.github/appveyor.yml
index 5a40005..a369e52 100644
--- a/.github/appveyor.yml
+++ b/.github/appveyor.yml
@@ -4,3 +4,20 @@
 - cmd: PCbuild\build.bat -e
 test_script:
 - cmd: PCbuild\rt.bat -q -uall -rwW --slowest --timeout=1200 -j0
+
+# Only trigger AppVeyor if actual code or its configuration changes
+only_commits:
+  files:
+    - .github/appveyor.yml
+    - .gitattributes
+    - Grammar/
+    - Include/
+    - Lib/
+    - Modules/
+    - Objects/
+    - PC/
+    - PCBuild/
+    - Parser/
+    - Programs/
+    - Python/
+    - Tools/