diff --git a/.github/workflows/tester.yml b/.github/workflows/tester.yml
index b8fc366..d334043 100644
--- a/.github/workflows/tester.yml
+++ b/.github/workflows/tester.yml
@@ -23,11 +23,20 @@ jobs:
           key: ${{ runner.os }}-npm-cache
           restore-keys: ${{ runner.os }}-npm-cache
       - name: Install Dependencies
+        run: npm install
+      - name: Determine zstd binary version
+        shell: bash
         run: |
-          npm install
-          npm install @mongodb-js/zstd-linux-x64-musl \
-            @mongodb-js/zstd-win32-x64-msvc \
-            @mongodb-js/zstd-darwin-arm64
+          case "$RUNNER_OS" in
+            "Linux")
+                echo "PLATFORM=linux-x64-gnu" >> "$GITHUB_ENV" ;;
+            "Windows")
+                echo "PLATFORM=win32-x64-msvc" >> "$GITHUB_ENV" ;;
+            "macOS")
+                echo "PLATFORM=darwin-arm64" >> "$GITHUB_ENV" ;;
+          esac
+      - name: Install zstd binary
+        run: npm install "@mongodb-js/zstd-${PLATFORM}"
       - name: Test
         run: npm run test
         env: