Added test dependencies

.github/workflows/python-package.yml

@@ -26,7 +26,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install flake8 pytest pytest-rerunfailures
+        python -m pip install -r test-requirements.txt
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
     - name: Test with pytest
       run: |

test-requirements.txt

@@ -0,0 +1,6 @@
+flake8==3.8.4
+pytest==6.2.4
+pytest-asyncio==0.14.0
+pytest-cov==2.10.1
+pytest-httpserver==1.0.0
+pytest-rerunfailures==9.1.1