diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 867b269154..c202dc5bbf 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -433,19 +433,15 @@ jobs:
           python-version: ${{ env.DEFAULT_PYTHON }}
           cache-key: ${{ needs.common.outputs.cache-key }}
 
-      - name: Cache platformio
-        if: github.ref == 'refs/heads/dev'
+      # Cache PlatformIO packages to speed up test builds
+      # Note: Caches are repository-scoped, PRs from forks cannot restore from the main repo cache
+      - name: Cache PlatformIO
         uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
         with:
           path: ~/.platformio
-          key: platformio-test-${{ hashFiles('platformio.ini') }}
-
-      - name: Cache platformio
-        if: github.ref != 'refs/heads/dev'
-        uses: actions/cache/restore@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
-        with:
-          path: ~/.platformio
-          key: platformio-test-${{ hashFiles('platformio.ini') }}
+          key: platformio-test-${{ runner.os }}-${{ env.DEFAULT_PYTHON }}-${{ hashFiles('platformio.ini') }}
+          restore-keys: |
+            platformio-test-${{ runner.os }}-${{ env.DEFAULT_PYTHON }}-
 
       - name: Validate and compile components with intelligent grouping
         run: |