diff --git a/.github/workflows/build_arduino.yml b/.github/workflows/build_arduino.yml
index f885bbb..4d80e18 100644
--- a/.github/workflows/build_arduino.yml
+++ b/.github/workflows/build_arduino.yml
@@ -58,7 +58,6 @@ jobs:
       matrix:
         fqbn:
           - "arduino:avr:yun"
-          - "arduino:avr:uno"
           - "arduino:avr:diecimila"
           - "arduino:avr:mega"
           - "arduino:avr:megaADK"
@@ -102,9 +101,9 @@ jobs:
         # Generate size deltas data for this board
         include:
           - fqbn: arduino:avr:nano
-            enable-deltas-report: true
+            enable-deltas-report: ${{ github.event_name == 'pull_request' }}
           - fqbn: arduino:samd:mkrzero
-            enable-deltas-report: true
+            enable-deltas-report: ${{ github.event_name == 'pull_request' }}
 
   # When using a matrix to compile for multiple boards, it's necessary to use a separate job for the deltas report
   report: