diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e24cc87..a6b630e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -50,12 +50,12 @@ jobs:
 
       # Install test dependencies
       - uses: awalsh128/cache-apt-pkgs-action@v1
-        runs-on: ubuntu-latest
+        if: matrix.os == 'ubuntu-latest'
         with:
           packages: expect
           version: 1.0
 
-      - runs-on: macOS-latest
+      - if: matrix.os == 'macOS-latest'
         run: brew install expect
 
       # Install Julia