fix workdir for tests

.github/workflows/smoketest.yml

@@ -14,7 +14,7 @@ jobs:
     - uses: actions/checkout@v4
 
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: "3.x"
 
@@ -30,9 +30,11 @@ jobs:
         nix_path: nixpkgs=channel:nixos-unstable
 
     - name: '"List and info" smoke test'
+      working-directory: tests
       run: ./smoketest_list_and_info
 
     - name: '"Install and run" smoke test'
+      working-directory: tests
       run: ./smoketest_install_and_run
 
     - name: Show output