diff --git a/.github/workflows/test-builds.yml b/.github/workflows/test-builds.yml
index 1467f1b33..fdb81fbdc 100644
--- a/.github/workflows/test-builds.yml
+++ b/.github/workflows/test-builds.yml
@@ -106,7 +106,7 @@ jobs:
 
     - name: Install PlatformIO
       run: |
-        pip install -U https://github.com/platformio/platformio-core/archive/master.zip
+        pip install -U https://github.com/platformio/platformio-core/archive/develop.zip
         platformio update
 
     - name: Check out the PR