explicit

Author: Massimiliano Pippi

Diff for: .github/workflows/test.yaml

@@ -7,7 +7,7 @@ jobs:
 
     strategy:
       matrix:
-        operating-system: [ubuntu-latest, windows-latest]
+        operating-system: [ubuntu-18.04, windows-2019]
 
     runs-on: ${{ matrix.operating-system }}
 
@@ -48,8 +48,8 @@ jobs:
         run: task test-unit
 
       - name: Run unit tests on the legacy package
+        if: matrix.os != 'windows-2019'
         run: task test-legacy
-        if: matrix.os != 'windows-latest'
 
       - name: Install Python
         uses: actions/setup-python@v1