diff --git a/.semaphore/semaphore.yml b/.semaphore/semaphore.yml
index 50849292..414503ae 100644
--- a/.semaphore/semaphore.yml
+++ b/.semaphore/semaphore.yml
@@ -32,7 +32,7 @@ blocks:
     dependencies: []
     run:
       # don't run the tests on non-functional changes...
-      when: "change_in('/', {exclude: ['/.deployed-versions/', '.github/']})"
+      when: "change_in('/', {exclude: ['/.deployed-versions/', '.github/'], default_branch: 'master'})"
     task:
       jobs:
         - name: Test