Revert "simulate scheduled test failure (#2714)" (#2716)

This reverts commit 81d76487.

.github/failed_schedule_issue_template.md

 ---
 title: Scheduled workflow {{ env.WORKFLOW }}/{{ env.JOB }} failed
-labels:
- - bug
- - "module: datasets"
-assignees: pmeier, fmassa
+labels: bug, module: datasets
 ---
 
 Oh no, something went wrong in the scheduled workflow {{ env.WORKFLOW }}/{{ env.JOB }}. 

.github/workflows/tests-schedule.yml

 name: tests
 
 on:
+  pull_request:
+    - "test/test_datasets_download.py"
+    - ".github/failed_schedule_issue_template.md"
+    - ".github/workflows/tests-schedule.yml"
+
   schedule:
-    - cron: "*/30 * * * *"
+    - cron: "0 9 * * *"
 
 jobs:
   download:
     runs-on: ubuntu-latest
 
     steps:
-      - name: Checkout repository
-        uses: actions/checkout@v2
+      - name: Set up python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.6
+
+      - name: Upgrade pip
+        run: python -m pip install --upgrade pip
+
+      - name: Install PyTorch from the nightlies
+        run: |
+          pip install numpy
+          pip install --pre torch torchvision -f https://download.pytorch.org/whl/nightly/cpu/torch_nightly.html
+
+      - name: Install tests requirements
+        run: pip install pytest pytest-subtests
 
-      - name: Simulate test failure
-        run: exit 1
+      - name: Run tests
+        run: pytest test/test_datasets_download.py
 
       - uses: JasonEtco/create-an-issue@v2.4.0
         name: Create issue if download tests failed