Add retry for flaky tests, and remove 3.8 from tests

Author: AdamYoblick

azure-pipelines/pipelines.yaml

@@ -28,7 +28,7 @@ jobs:
     pool: { vmImage: "ubuntu-latest" }
 
     variables:
-      python.version: "3.8"
+      python.version: "3.9"
 
     steps:
 
@@ -57,8 +57,6 @@ jobs:
 
     strategy:
       matrix:
-        py38:
-          python.version: "3.8"
         py39:
           python.version: "3.9"
         py310:
@@ -87,8 +85,6 @@ jobs:
 
     strategy:
       matrix:
-        py38:
-          python.version: "3.8"
         py39:
           python.version: "3.9"
         py310:
@@ -117,8 +113,6 @@ jobs:
 
     strategy:
       matrix:
-        py38:
-          python.version: "3.8"
         py39:
           python.version: "3.9"
         py39_32:

tests/debugpy/test_exception.py

@@ -150,6 +150,7 @@ def raise_without_except():
     sys.platform == "darwin",
     reason="https://github.com/microsoft/ptvsd/issues/1988",
 )
+@pytest.mark.flaky(retries=2, delay=1)
 @pytest.mark.parametrize("target", targets.all_named)
 @pytest.mark.parametrize("run", runners.all)
 @pytest.mark.parametrize("raised", ["raised", ""])

tests/requirements.txt

@@ -4,6 +4,7 @@ pytest
 pytest-xdist
 pytest-cov
 pytest-timeout
+pytest-retry
 
 ## Used by test helpers: