diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 61595e77..ed895c6a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -17,10 +17,14 @@ jobs:
     - name: Run tests
       run: swift test -v
   test-linux:
-    runs-on: macos-latest
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        swift: [5.3]
+    container: swift:${{ matrix.swift }}
     steps:
     - uses: actions/checkout@v2
     - name: Build
-      run: swift build -v
+      run: swift build -v --enable-test-discovery
     - name: Run tests
       run: swift test -v --enable-test-discovery